Malicious PDF — malware analysis report

Static analysis result for SHA-256 7aa6a40e5f7a8d98…

MALICIOUS

PDF

82.1 KB Created: 2021-03-20 15:38:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 39b296388c4f8d6467068e14e1d18fce SHA-1: 959b3c6860c944733778e898c6e314faabde56b1 SHA-256: 7aa6a40e5f7a8d9877b070c4188466d281f300110b8d03382887826d08a41449
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links to external websites, a common tactic for phishing or malware distribution. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of these links, suggesting an attempt to create a link farm for SEO manipulation or to host malicious content. The primary URL, 'https://maypoin.ru/wix?keyword=true+skate+mod+apk+5play', suggests a lure related to modded applications, likely to entice users into downloading further malicious payloads or providing sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=true+skate+mod+apk+5play
    • https://dedelazixuni.weebly.com/uploads/1/3/4/5/134596723/9593909.pdf
    • https://xegoguvaposa.weebly.com/uploads/1/3/4/6/134677344/a287f602aaf16.pdf
    • http://fawetugamuxix.66ghz.com/how_many_points_do_you_have_on_a_sc_drivers_license.pdf
    • https://cdn-cms.f-static.net/uploads/4404987/normal_603c0cbf2f90f.pdf
    • https://wepebajaka.weebly.com/uploads/1/3/4/5/134588919/zifetiru.pdf
    • https://vulabomanuxuw.weebly.com/uploads/1/3/4/8/134857085/wukazaviwikore.pdf
    • https://cdn-cms.f-static.net/uploads/4463034/normal_603975f313a12.pdf
    • https://dudafenerow.weebly.com/uploads/1/3/4/9/134900552/b737e.pdf
    • https://vavuwujaxozu.weebly.com/uploads/1/3/1/0/131070334/bavowonakapixomub.pdf
    • https://cdn-cms.f-static.net/uploads/4446507/normal_60372b40005a1.pdf
    • https://static.s123-cdn-static.com/uploads/4488329/normal_5fe3a56b2d326.pdf
    • https://lalojitewimagix.weebly.com/uploads/1/3/5/3/135304200/e76ad86c8175d.pdf
    • https://cdn-cms.f-static.net/uploads/4481053/normal_60385cc289a48.pdf
    • https://gefivepuli.weebly.com/uploads/1/3/4/6/134620723/zomirad-posatodilep-lugubibolob-wugix.pdf
    • https://lolijigi.weebly.com/uploads/1/3/4/7/134700793/bezetu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mobotifiriw.epizy.com/83971964935.pdf
    • https://2ea3657d-1c4c-40dd-8491-58aeeb8dc933.filesusr.com/ugd/18a85a_98a1a0beeb654746bc6f8ce9ddb864a7.pdf?index=true
    • https://s3.amazonaws.com/nefomojuwet/resistance_training_exercises_for_beginners.pdf
    • http://renunuxuxalebav.epizy.com/jac_10th_result_2016.pdf
    • http://terudobikemep.rf.gd/is_maschine_worth_it.pdf
    • https://945b3f91-9c76-4178-be32-f0dab3cfe2c6.filesusr.com/ugd/8d5d69_4ecb62f009e04753ae942074de156cfc.pdf?index=true
    • https://11fe2947-f393-4df3-905d-f9f3730e834a.filesusr.com/ugd/b1b16e_40d082a1e8e843598a715f2a27750c51.pdf?index=true
    • https://s3.amazonaws.com/kovezodepugov/xirufoboniwenuvot.pdf
    • https://s3.amazonaws.com/fonazuzixagizir/91524852753.pdf
    • https://s3.amazonaws.com/jenisozazewubo/adobe_audition_cc_2017_32_bit.pdf
    • https://99470c7d-c692-4648-a7b8-36ea19db2883.filesusr.com/ugd/ab059d_6a7f442fc6734f269f7f2c7c7a4d035d.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001022d.bin
e1c848e522a77f61b2269ed38522e918bade353259d14ae53bb928d176a9cb4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1022D 5344 bytes
font_01_sfnt_off00011451.bin
9ebaac794b90eed11a67c0bed8b90fe1c63bc26b76f152dc58c0237bfc985b4c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11451 11288 bytes

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