Malicious PDF — malware analysis report

Static analysis result for SHA-256 b69905d04c52e9a4…

MALICIOUS

PDF

179.9 KB Created: 2021-03-23 12:37:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: a5964068ed5513896d033d07d0844e4e SHA-1: 68d151ee50ff8fde5cbd4282cca0ec9adb205269 SHA-256: b69905d04c52e9a434c38227a84d52453c90d58fb8c66e30bad3e1d79eafafd2
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous external URIs and is described as a link farm on disposable hosting, with one notable URL being https://botokaw.ru/wix?keyword=the+answer+42. The presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious sites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8972

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://botokaw.ru/wix?keyword=the+answer+42 PDF link annotation
    • http://nyvelsets.online/77570921740ibrhw.pdfIn PDF document text
    • https://cdn.sqhk.co/xororasomig/bN4M1PS/88472513691.pdfIn PDF document text
    • http://delinapod.mypressonline.com/fepekuvamiz.pdfIn PDF document text
    • http://idealica-co.site/covid_19_pandemic_essay_tagalog8jgxm.pdfIn PDF document text
    • https://cdn.sqhk.co/tufuboloruj/jhhe3je/janijojud.pdfIn PDF document text
    • http://meroxisawifagu.mygamesonline.org/archinteriors_40.pdfIn PDF document text
    • http://keepqifi.site/lifevomotiremezuig2iv.pdfIn PDF document text
    • http://bodyita.space/booty_farm_imagesf6950.pdfIn PDF document text
    • http://sosiwawivijomo.scienceontheweb.net/83711204558.pdfIn PDF document text
    • http://miwewumexurigan.sportsontheweb.net/what_does_a_limit_switch_do_on_a_furnace.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://smc.org.in)MeeraRegularMeera2016SMC7.0.0+20171102HussainIn PDF document text
    • http://smc.org.inhttp://smc.org.inIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://f2fffe36-c7b4-4b88-9608-518dc6c14750.filesusr.com/ugd/950b2a_943de9860f11484a934c5c1a67f68072.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ganubatebedoxez/moto_ce0168_hard_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67622f54-3bfa-4aaf-a4c2-31895a9dcc2c/dexexewunirezowomasukerok.pdfIn PDF document text
    • https://e8677ced-6330-435e-8237-200fb10408a4.filesusr.com/ugd/a4c1fa_5ed10959eb8541cebb7446e619ee9301.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/a95e8f00-a2e2-44ce-8db0-c2a68dd0aa61/dugoje.pdfIn PDF document text
    • https://0eb00d84-361a-45dc-b346-1af5c8eb785c.filesusr.com/ugd/d79848_c914c89dd24548c08d043e162273e307.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c2e8667-d6c7-4bf7-a1df-a019f8f4c597/vajajinilokuvufijore.pdfIn PDF document text
    • https://s3.amazonaws.com/vovopafubipu/26450329213.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29e1d65f-ab8f-4e9c-9c45-8b3019961316/35523024955.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn PDF document text
    • http://sinhala.sourceforge.net/In PDF document text
    • http://sinhala.cvs.sourceforge.net/viewvc/*checkout*/sinhala/sinhala/fonts/CREDITSIn PDF document text
    • http://www.gnu.org/licenses/gpl-2.0.htmlIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 12

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off00021412.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x21412 3204 bytes
SHA-256: 004255bd3bd10f7fb9deef8c074156735f1d4b95e2564b931e6059fb921459a6
font_00_sfnt_off0001c01f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C01F 6744 bytes
SHA-256: 0e099439fad9d82cab7fe652aa00060dd1135bc3bc3a9cb372ccb0b68d5d5473
font_01_sfnt_off0001d7aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D7AA 5000 bytes
SHA-256: 643a8f84937af1e64291f5c98db13c697e07607b1b21e0f3227dadf8d6948cb0
font_02_sfnt_off0001e8b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1E8B5 3792 bytes
SHA-256: 1fd464739946460e833ade7eb0aa23b85dc4b12a492f056daa29606439ddb77d
font_03_sfnt_off0001f69f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F69F 4892 bytes
SHA-256: e0079f09db5e3adb03f9f87f95add1711d4539799d988c8fe3aa7ab3b51b0831
font_04_sfnt_off00020675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20675 3600 bytes
SHA-256: 71b71b3c95c396df86b74eda9d675472dd4ded91f59021c0ba2dd788bd645a1e
font_06_sfnt_off000220f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x220F6 5612 bytes
SHA-256: 3d802cc5995d55f536a17739b8feb7207f58781f341115108218652133911458
font_07_sfnt_off0002343d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2343D 2812 bytes
SHA-256: 696cd7a76e16d9663ebac5964e2ac97592af2debc62c60b4c02a8bfd9aa268b8
font_08_sfnt_off0002408f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2408F 6476 bytes
SHA-256: 71f0ea6b182f67b27e6afd052ef602895c4138dd0e70c0f98b4e68aa9f7baf72
font_09_sfnt_off000251cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x251CC 21652 bytes
SHA-256: a577c981566f1f1ede88dbb02b5d345e684478c6ae08935c495ea878effcfc2e
font_10_sfnt_off00028ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28EC3 19624 bytes
SHA-256: 6365b43302e291d227da14c9d8128ea03622ea724bfc602f41ca20a9369371b0
font_11_sfnt_off0002afea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AFEA 3284 bytes
SHA-256: dfca31268cb36367e44c29d80ac6d57124a4a863b1deb62a7c217727ab33a636