Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2786fb1d50d938e…

MALICIOUS

PDF

76.1 KB Created: 2021-03-07 19:28:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c3a2dfb24e65f7678a06fba5718bbc05 SHA-1: 3867c73de81921ea23563741d4e1fe85696f0dc8 SHA-256: d2786fb1d50d938e460e92fb4a9971bd3b212df5d9798d58ba160225a359bcd7
184 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm designed to distribute traffic to potentially malicious sites. ClamAV detection and ML classification confirm its malicious nature, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is the attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9739

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://botokaw.ru/award?keyword=cal+osha+fume+hood+face+velocity PDF link annotation
    • https://pobanuti.weebly.com/uploads/1/3/1/4/131437932/e107d4e.pdfIn PDF document text
    • http://saudiautoinsurance.com/install_android_studio_linux_debiancsdwp.pdfIn PDF document text
    • http://vizit.store/savarez_classical_guitar_strings_normal_tensionefxdz.pdfIn PDF document text
    • https://cdn.sqhk.co/wisisatofife/Hje0DyK/skylanders_ring_of_heroes_reboot.pdfIn PDF document text
    • https://zupavuzinopaz.weebly.com/uploads/1/3/4/2/134265708/felovelamowoba-tejufiviw-letisuvivip.pdfIn PDF document text
    • http://centerverifybadge.com/bob_omb_battlefield_alto_sax_sheet_music1lfxe.pdfIn PDF document text
    • http://prostotit.site/110146344752y9h9.pdfIn PDF document text
    • https://cdn.sqhk.co/gituxogud/shdjhif/guide_beach_racing_buggy_2020_updates.pdfIn PDF document text
    • https://bizotimugir.weebly.com/uploads/1/3/1/1/131164076/d9226129dc7.pdfIn PDF document text
    • http://oneitshop.info/canllarda_beslenme_ekilleri_10_snf2u4ye.pdfIn PDF document text
    • http://vnds-v.website/beat_maker_apk60ojg.pdfIn PDF document text
    • http://lnstagramcopyrightmanagement.com/didalaxobedotigonodatuper8z57f.pdfIn PDF document text
    • https://guxipalun.weebly.com/uploads/1/3/1/8/131857363/51426cd2d9b.pdfIn PDF document text
    • https://cdn.sqhk.co/rarukaboz/hiJgiVN/polynesia_adventure_game_deer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccf5fd82-e23e-4379-a5a6-8d5ddaadd827/reloading_kit_for_beginners_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13251922-fce2-486a-add6-4f13400a1eeb/craftsman_drill_press_chuck_removal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/144f8b24-f357-4867-a9ff-85c05a532223/digosozusidizaxut.pdfIn PDF document text
    • https://27420876-d215-4860-9a72-f48db0d0c320.filesusr.com/ugd/4062c2_e5ae971a1dc64c6e99f5bdc86acd5c40.pdf?index=trueIn PDF document text
    • https://201a0bc5-0eb3-4135-8969-828875a6b07d.filesusr.com/ugd/607883_6d83a79758e24653af22b4a576621133.pdf?index=trueIn PDF document text
    • https://070488ba-e3d9-4c74-834b-445551f5513c.filesusr.com/ugd/fb83f1_b5e640bf3a4041ceaebbe231c0670184.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0c12a44-dcbe-45a0-8d19-eeb464158c96/bejekusewidafazi.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_off0001046a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046A 5232 bytes
SHA-256: 9101da0f535c9c12617f9ec881bcb05f168317a41e277c7ff4790ab03f9fa543

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