Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9e3476ce60d142f…

MALICIOUS

PDF

63.7 KB Created: 2021-03-28 21:18:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 5159d16a9b08d068367f267824e02e7a SHA-1: 3235d0bcf4b51b91042cb21d7513536bf8111ad1 SHA-256: b9e3476ce60d142ffff98ac865eb6a7255ab5ba4113a51bb4910cfae03c1cbcd
184 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating it is likely a phishing or trojan delivery mechanism. The document contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. While no scripts were directly extracted, the PDF structure and embedded URIs strongly suggest an attempt to exploit users through deceptive content and external redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7291

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://soxebez.ru/award?keyword=sixth+grade+grammar+worksheets+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4503987/normal_5fef67df267c4.pdfIn PDF document text
    • https://zofoneparadi.weebly.com/uploads/1/3/5/3/135341866/numawese.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389601/normal_6007de1d0bc45.pdfIn PDF document text
    • http://svoylend.xyz/bamofumekobokadojx3pwk.pdfIn PDF document text
    • http://xuxogez.22web.org/project_management_made_fun_and_easy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416659/normal_6059dc7585381.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474206/normal_604b785463c61.pdfIn PDF document text
    • http://copyrightnotice-ig.com/samsung_smart_care_vrt_plus_washer_wont_turn_onpsijb.pdfIn PDF document text
    • http://ig-soft-team.com/halloween_printable_worksheets_for_kindergarteno873m.pdfIn PDF document text
    • http://tozimapowox.iblogger.org/fisad.pdfIn PDF document text
    • https://betetudiju.weebly.com/uploads/1/3/5/3/135348010/jebowinemaf_naperurif.pdfIn PDF document text
    • https://rudumareta.weebly.com/uploads/1/3/1/8/131871695/retutadubotabibisit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421050/normal_6046862227904.pdfIn PDF document text
    • http://shop-you.xyz/harmony_booster_seat_with_backumjm7.pdfIn PDF document text
    • http://nesobaka3.xyz/badet235um.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388038/normal_605002501882a.pdfIn PDF document text
    • https://bileravufal.weebly.com/uploads/1/3/4/7/134749654/8e8e17e16a314bf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409248/normal_5fd344acc61f1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407299/normal_5fcd8e9a6f1b2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://buzuxujov.epizy.com/93198951865.pdfIn PDF document text
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_0c35de595dd44ace90760861eca4822f.pdf?index=trueIn PDF document text
    • https://189c2d36-84ff-4b81-9465-96c33c1d3b91.filesusr.com/ugd/35ddae_88fa401bf3014bf1a01b52bebe53cf54.pdf?index=trueIn PDF document text
    • https://43081b45-6e48-4b43-b724-9328fda377ae.filesusr.com/ugd/26481d_42179f3708bc4d2f83f11c06cb4ef5d8.pdf?index=trueIn PDF document text
    • https://7ef5d8b8-74ac-4e0a-b0a0-fa61ca6462a8.filesusr.com/ugd/23e9be_ae96a6c031bf45df8416bd3c1f7d408f.pdf?index=trueIn PDF document text
    • https://89d37d93-eaf9-4fc7-8d5e-07438b8f18e7.filesusr.com/ugd/e80f4c_b29d2ab01a5149a39e907ef42a12287d.pdf?index=trueIn 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_off0000e8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C2 5752 bytes
SHA-256: 2dd5601d1a19b8969c86d6c69ab5108daa0406d0976584294abd4d463ef6e82b

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