Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6af387ad4832ddc…

MALICIOUS

PDF

116.5 KB Created: 2021-03-19 08:32:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: c85503008eca6bfc7392fcffa316cbf4 SHA-1: b2f15789e97ebe6a590946893a1fee6643a77841 SHA-256: e6af387ad4832ddc67a8277b0bd5ea86541da7132086054318fa2c766b477fc7
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external links, with one specifically pointing to 'https://xezojetit.ru/wb?keyword=what%20does%20patriotism%20mean%20in%20english', suggesting a lure for SEO manipulation or phishing. The PDF structure and link farm characteristics further support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://xezojetit.ru/wb?keyword=what%20does%20patriotism%20mean%20in%20english PDF link annotation
    • http://gk-kuban.ru/xanexeminarefibi77ndo.pdfIn PDF document text
    • http://aydym.club/steam_achievement_manager_vac_banrmzd3.pdfIn PDF document text
    • https://cdn.sqhk.co/nivodoruw/iajeifh/kajimexab.pdfIn PDF document text
    • https://cdn.sqhk.co/sifujubagis/BD9ggjb/vutawuribudaz.pdfIn PDF document text
    • http://sifulodidikit.22web.org/dorivoridelizo.pdfIn PDF document text
    • https://kelulove.weebly.com/uploads/1/3/0/7/130775366/946a14e2ae125c.pdfIn PDF document text
    • https://fiwujewi.weebly.com/uploads/1/3/0/9/130969997/dujakofegenuti_jukegupewusabe_gaxudokog_lumunuledefube.pdfIn PDF document text
    • http://osmosiotzs.fun/how_do_i_factory_reset_my_fitbit_charge_hrldnf5.pdfIn PDF document text
    • https://cdn.sqhk.co/wunokebewoz/fggkhhG/food_wars_anime_season_2_episodes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://d7b50aa0-fea3-4edc-ba9e-4ed0094b0c60.filesusr.com/ugd/7f614e_940127b35330467cbfaed0853d757aeb.pdf?index=trueIn PDF document text
    • https://b6de9e3f-c562-4e05-b5ee-70895c8060ae.filesusr.com/ugd/3801ff_c353f20591da4f198285055fea835355.pdf?index=trueIn PDF document text
    • https://30f21d72-2b41-4965-a7bc-2abb02bf1ded.filesusr.com/ugd/47e66e_09f3b66cdc014f7381dbfc778edeee80.pdf?index=trueIn PDF document text
    • http://zeluwaboder.rf.gd/61697750601.pdfIn PDF document text
    • https://c4647614-9ff8-4b00-b819-08dc938bd166.filesusr.com/ugd/5d3f24_c653ad7037dd4a0a8e086c4affe1b8a5.pdf?index=trueIn PDF document text
    • https://2a07c75e-e898-48ba-b326-4cccc82d0599.filesusr.com/ugd/ff154e_72e277475e44410fb392d1b0bf271c05.pdf?index=trueIn PDF document text
    • https://a44a9d9e-3ce9-422e-9b5d-83ef2d4925cb.filesusr.com/ugd/3234e9_a74771f4cc6f4c7b97131c272fe20644.pdf?index=trueIn PDF document text
    • https://d78d2789-9aef-4bfd-88be-9093bec910ef.filesusr.com/ugd/87a178_5ebd3bdcd52f4968a12a7b4e9a21686e.pdf?index=trueIn PDF document text
    • https://9305c775-266c-4126-9ef9-90a5cffee957.filesusr.com/ugd/c3f88d_4417bd6e46ef4fa5a06423eb9707af13.pdf?index=trueIn 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_010_off0001936c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1936C 18928 bytes
SHA-256: cf0c72fefa0725ba456bb16606fca5397b4d6d422b4c6d38f78d599fb8ec6c83
font_00_sfnt_off0000f69b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF69B 8064 bytes
SHA-256: 17a0a031f2fcec8c33ec97665352a94af13c64a9fa64d3eb7eb9d81b06615a1d
font_01_sfnt_off00011210.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11210 5384 bytes
SHA-256: dff708710598180c2e9f46a62f2c4e15a1db0b89737808efb2455875bd5c3285
font_02_sfnt_off0001243e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1243E 3676 bytes
SHA-256: 0f44e947001fc0ad1d16a4f275f16ba17fdcd678f4128552e19fe0e4cdd0b4a7
font_03_sfnt_off000131d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131D7 2328 bytes
SHA-256: 864cbe2c6973b44d2b71e19ffbffb2328dcb3759b07ceb43c11d5a372fc4956d
font_04_sfnt_off00013c8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C8D 2108 bytes
SHA-256: d117309382da938f7dffedc42f90dd4217b4d540d75629b80669d975ecbc171e
font_05_sfnt_off00014658.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14658 6640 bytes
SHA-256: 538512be6c526ea957b587fa229624d829dca4873b622d187784a60d2c877fcd
font_06_sfnt_off000157f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157F6 20404 bytes
SHA-256: 96be2ab9bf6a98ff8c9e093d8a6464aae299ae1fd7abf9898d1bfe69a5bafc64
font_08_sfnt_off0001b2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B2CF 3312 bytes
SHA-256: 3aba69024353a35aaf3245bc1c8bbebd77997dd8451b828295fb0f8ac2b88867

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