Malicious PDF — malware analysis report

Static analysis result for SHA-256 94017996c8db088a…

MALICIOUS

PDF

76.8 KB Created: 2021-01-25 14:39:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3c336738411449a65af0619aa79ceff2 SHA-1: 9a54b59cc7604fffdeadd842db51f977cbfb6104 SHA-256: 94017996c8db088ac9ae4435a328edc7abe055946cb000b34130ac14aed42455
156 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, indicating a phishing or trojan threat. It contains a large number of external links, suggesting it functions as a link farm to direct users to potentially harmful websites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly support this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://leonvi.ru/123?utm_term=elevate+lompoc+instagram PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4420776/normal_5fd0399c8b6e4.pdfIn PDF document text
    • https://zoxuzuxebexot.weebly.com/uploads/1/3/0/9/130969059/f7da43.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485443/normal_5ff3e76ee98ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424025/normal_5ff60977384ef.pdfIn PDF document text
    • https://kogababofaf.weebly.com/uploads/1/3/0/9/130969162/kanubuv.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387925/normal_5fdca9799e1ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413225/normal_600a9ad8cdb5d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404122/normal_5fde9db3d9a9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504791/normal_5fdc63d9ac611.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421050/normal_600b652d4f473.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414336/normal_5ff7611ba02ee.pdfIn PDF document text
    • https://jowovodepavilim.weebly.com/uploads/1/3/4/6/134651336/lapar.pdfIn PDF document text
    • https://tijesefufejeje.weebly.com/uploads/1/3/4/8/134858706/19084bb9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/fejatepudopito/45501365927.pdfIn PDF document text
    • https://s3.amazonaws.com/wurivuve/62266144448.pdfIn PDF document text
    • https://s3.amazonaws.com/xumakomowi/android_10_gncellemesi_alacak_telefonlar_huawei.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/aquatic_life_preservation.pdfIn PDF document text
    • https://s3.amazonaws.com/rijaliwiguvex/euphemism_worksheets_for_grade_6.pdfIn PDF document text
    • https://s3.amazonaws.com/fodose/openstack_pike_installation_guide.pdfIn 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_off0000eeca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEECA 5268 bytes
SHA-256: 711a7560ba48c0f12c6b125b8f937c8389cb35824a52be4d53bef01e73d6f62d
font_01_sfnt_off000100ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100AE 10964 bytes
SHA-256: f9b8d7db39b5b999374236880f8f445490399ffad91de14f1ed34684850ddbb4

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