Malicious PDF — malware analysis report

Static analysis result for SHA-256 06e950edfc29710f…

MALICIOUS

PDF

88.7 KB Created: 2021-05-15 12:19:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: cd7361c8950dfec70b55db2acd369f22 SHA-1: 455b517685850a68dfb7b8028cd813ee46065268 SHA-256: 06e950edfc29710ffa50709a545f200b81286de5925fb22f49e7031061d84959
184 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. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. One of the primary URLs identified is https://pelibifir.ru/strik?utm_term=don%2527t+know+where+i+am+going+quotes, which is likely used to redirect users to malicious content. The document body is heavily obfuscated and contains metadata indicating it was generated by wkhtmltopdf.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7054

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 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
  • 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://pelibifir.ru/strik?utm_term=don%2527t+know+where+i+am+going+quotes PDF link annotation
    • https://jizufuvarax.weebly.com/uploads/1/3/1/1/131164460/jemurufitumekutawazu.pdfIn PDF document text
    • https://putukaxuke.weebly.com/uploads/1/3/1/4/131437363/jumari.pdfIn PDF document text
    • http://pafexomasig.iblogger.org/aspect_studios.pdfIn PDF document text
    • http://mangalvpodarok.ru/analytic_projective_geometrywznad.pdfIn PDF document text
    • http://vofovadero.22web.org/kosolofodugesemanupag.pdfIn PDF document text
    • https://lirefabagobaxi.weebly.com/uploads/1/3/4/0/134012393/wovanifopi.pdfIn PDF document text
    • https://waxovabuwemox.weebly.com/uploads/1/3/4/5/134585519/pafog_jugibuwuti_gurigigudira.pdfIn PDF document text
    • http://xonibiz.22web.org/migos_songs_baseshare.pdfIn PDF document text
    • http://christmas-gift.ru/my_boy_gba_emulator_full_freegno7w.pdfIn PDF document text
    • http://remont-kvartir-otzyvy.moscow/simple_crossword_puzzles_printable_uk86po3.pdfIn PDF document text
    • http://hd-cam-mirror-up1.club/31574477877b3k2l.pdfIn PDF document text
    • http://ligalirulal.22web.org/pofufivifirojasode.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://18574fdc-dbe8-4f24-a3f7-ab3d6ff540e7.filesusr.com/ugd/d45bfa_256502e79ec64cb7a5a0523c099e8f69.pdf?index=trueIn PDF document text
    • https://b73db3ac-2e3c-475a-83ab-7f4668f00a8f.filesusr.com/ugd/80e8fa_27049b0e60574cfbb4910fcce773e6cb.pdf?index=trueIn PDF document text
    • https://02687da8-bf2b-436b-a8ca-82c6e04513a5.filesusr.com/ugd/e48f8a_ffacbfa41975434a9de10f8228c30a61.pdf?index=trueIn PDF document text
    • http://vuxifonodine.epizy.com/xunel.pdfIn PDF document text
    • https://35b1a599-9f45-4897-82ce-59a931fc5495.filesusr.com/ugd/daca0d_9a99e74ec29b429e8db4be771eb2df25.pdf?index=trueIn PDF document text
    • https://e082cb0d-9c22-4a21-acb7-e2c6127a51d3.filesusr.com/ugd/ff0c06_37415478b40c4b9a94ed855ab3ab5ae7.pdf?index=trueIn PDF document text
    • https://945c5b1a-9feb-4a08-b72d-c905ca1b1520.filesusr.com/ugd/27135d_f7d60fa8f2014045a7368b69e8bd8905.pdf?index=trueIn PDF document text
    • http://xuxamasisovuku.epizy.com/abstract_iq_test_questions_with_answers.pdfIn PDF document text
    • http://gesesasogibigaw.rf.gd/hit_guidelines_ash.pdfIn PDF document text
    • http://jujimewukekupur.epizy.com/twilight_midnight_sun_trailer_2019.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001538c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1538C 5264 bytes
SHA-256: 0271ccfa075464d63c4fdcbb677dda05c60d6c742b02df19999413fe898ca526

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