Malicious PDF — malware analysis report

Static analysis result for SHA-256 6eeeef7934e75908…

MALICIOUS

PDF

117.7 KB Created: 2021-03-28 10:36:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 619279fe44d1157ae42b63d0e8a49bf2 SHA-1: 4783c767a729c54d0d2e8d5d3b0a4cfe5aa4eccb SHA-256: 6eeeef7934e7590879999567da3a3d77f17172620dc2561355747f5653ec6a0e
126 Risk Score

Malware Insights

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

The sample is a PDF document that exhibits characteristics of a phishing or malware distribution lure, as indicated by the high ML score and ClamAV detection. It contains numerous embedded URLs pointing to potentially malicious or disposable domains, suggesting an attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata related to PDF generation and a keyword that might be used in a phishing context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 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://xezojetit.ru/award?keyword=define+self+esteem+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4482418/normal_60103983f11ee.pdfIn PDF document text
    • https://cdn.sqhk.co/jipazebej/gjbhelg/sup_multiplayer_racing_apk_cheat.pdfIn PDF document text
    • http://dodemul.mygamesonline.org/biology_mcq_free_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392877/normal_5fc7793df2795.pdfIn PDF document text
    • https://momaduse.weebly.com/uploads/1/3/4/8/134895420/tifuketavepipidevade.pdfIn PDF document text
    • https://cdn.sqhk.co/sidogorego/fghDCZ7/99119881385.pdfIn PDF document text
    • https://jibukosixej.weebly.com/uploads/1/3/4/0/134018053/0e4441f45cf86.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/glghUjf/6186488290.pdfIn PDF document text
    • https://cdn.sqhk.co/libuzewis/cpURlgF/87457710412.pdfIn PDF document text
    • http://nowukusox.mypressonline.com/what_is_your_unique_student_identifier.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383444/normal_604e1c6716715.pdfIn PDF document text
    • http://vumexovuvelafe.medianewsonline.com/are_chocolate_dapple_dachshunds_rare.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475570/normal_5fe4f1a1a67ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368978/normal_5fe9827b3eac4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zogadawedalifap.onlinewebshop.net/59680870707.pdfIn PDF document text
    • https://275320ff-96dd-455a-9699-a0fdc58b27a5.filesusr.com/ugd/943725_a4f4ece74beb4305a6f06b72a0fc2b57.pdf?index=trueIn PDF document text
    • http://rufapapufogap.onlinewebshop.net/kusunudiwetolupara.pdfIn PDF document text
    • https://8d928d4c-4e32-4dc6-8093-d383c90b3cca.filesusr.com/ugd/b5d49c_3bf3e761cf3e4750945286837be5d2c6.pdf?index=trueIn PDF document text
    • https://5b4dac29-bb7d-48a4-8b57-1120036b5257.filesusr.com/ugd/2d1648_9129d79f347f4d1586825979ce1665e0.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
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018f6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18F6B 4880 bytes
SHA-256: 3662ac0963f8d8550050c93b2a9a3c359690cc1e36c0723289d4435a645326dd
font_01_sfnt_off0001a001.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A001 12324 bytes
SHA-256: 8c6f5efc6c5e2a6b05fd95e13be96f2c3cf36bffec03b7cf111b33b541136c8f

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