Malicious PDF — malware analysis report

Static analysis result for SHA-256 920e3860440e5a3c…

MALICIOUS

PDF

118.8 KB Created: 2021-03-09 10:02:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 28928a266cfbd9fd5e5f441893723a74 SHA-1: e15b69a7aab9b553641da547bf44cb084710e91a SHA-256: 920e3860440e5a3c3f32555ebe09fcebe71e05ec57cda3dfdb637a807c89e850
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9733

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://jumiwimov.ru/wix?keyword=hypodense+lesion+meaning+in+malayalam PDF link annotation
    • https://cdn.sqhk.co/fazituku/iaejjEG/71108344234.pdfIn PDF document text
    • http://astrology-personal.online/dream_yuga_price_in_rajkot5kj0h.pdfIn PDF document text
    • https://cdn.sqhk.co/patagarinixa/eJpjgij/30862247289.pdfIn PDF document text
    • https://cdn.sqhk.co/bosejadukifo/djcHhhT/ftd_disease_genetic.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476127/normal_5fd04d6fb86b5.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/a7ThjvV/glory_road_paintball_reviews.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495265/normal_5fddf99ca3c55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464313/normal_602e6ac51c9c5.pdfIn PDF document text
    • http://ch-data-2a8fv9s.pw/types_of_energy_lockout_tagoutlio90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422912/normal_6039ff3ab28e1.pdfIn PDF document text
    • http://kaxiwemusemoj.mypressonline.com/aeschylus_oresteia_themes.pdfIn PDF document text
    • http://xomunuxeju.sportsontheweb.net/dobasosaxuxet.pdfIn PDF document text
    • http://jadogaxarabu.mygamesonline.org/32697216495.pdfIn PDF document text
    • http://vir-tus.com/encyclopedia_of_life_support_systems_freefhwr7.pdfIn PDF document text
    • http://swiss-gear-top.xyz/nozegezafumimogupirusoilvpg.pdfIn PDF document text
    • http://zivozariwusa.22web.org/71271761546.pdfIn 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.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://fe426b01-1dd0-498a-b08e-7ec37e320b94.filesusr.com/ugd/6b45f0_9a582b9c05254ff9b8cef7cb91856bd2.pdf?index=trueIn PDF document text
    • https://83d12552-0bc1-4415-b221-1da25caacb9b.filesusr.com/ugd/1e11d0_610494d69d88474e9739bc4a06a07458.pdf?index=trueIn PDF document text
    • https://5b949be5-44ef-49af-96c7-0ebaa8fe632e.filesusr.com/ugd/3402b1_e8d61a3aa2484d9395982edcee1adce2.pdf?index=trueIn PDF document text
    • http://kasanuvuwa.epizy.com/naming_aldehydes_worksheet.pdfIn PDF document text
    • https://3f740848-0e57-4b51-8596-564812021bec.filesusr.com/ugd/cbe17c_02587dac8cc44286aebd0203c6dcbcfc.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
    • https://gitlab.com/smc/meera/blob/master/COPYINGIn 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 10

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off000129f1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x129F1 11888 bytes
SHA-256: 6cf358d3e108beae9507721309ea084fdef571a96b5211a167918ffbe6f7d2e4
stream_011_off0001a026.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x1A026 18176 bytes
SHA-256: 9a53eb0f5d899206140142024e1329928d04523b9b037af6ea44b3d64dff0b7c
font_00_sfnt_off0000f998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF998 5588 bytes
SHA-256: b044f7aea9bd4da09f60dbfa6c607eb09ad2994fa39cfb6d63ff774511ceb15f
font_01_sfnt_off00010d27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D27 5248 bytes
SHA-256: 7ba251344f33bd2e2e97bf500bd9e9bde5d815a00dd1c0d018aab65daaabe40e
font_02_sfnt_off00011ef4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EF4 2656 bytes
SHA-256: dbaab8dcf32bfe64cb008f34eb54f5316f62236e8dffe3de49b44225404383a5
font_04_sfnt_off000150c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150C2 2328 bytes
SHA-256: 864cbe2c6973b44d2b71e19ffbffb2328dcb3759b07ceb43c11d5a372fc4956d
font_05_sfnt_off00015b78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B78 2108 bytes
SHA-256: d117309382da938f7dffedc42f90dd4217b4d540d75629b80669d975ecbc171e
font_06_sfnt_off00016543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16543 6640 bytes
SHA-256: 538512be6c526ea957b587fa229624d829dca4873b622d187784a60d2c877fcd
font_07_sfnt_off000176e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176E1 12228 bytes
SHA-256: ce3b06b8dc3473490b0aa5caa6c6dacab0a8691764b364b67e5e3a58f2c38282
font_09_sfnt_off0001bcfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BCFB 3276 bytes
SHA-256: c12c670e310cd2dd0f4b1ea6ea0d01ef35e1284caa1cfc967b978b02bd897c09

Open this report in the interactive analyzer, or submit your own file for analysis.