Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e7c85700f7a6b73…

MALICIOUS

PDF

81.2 KB Created: 2021-03-15 06:00:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: fbbfcd9800e5848401f48200461dda06 SHA-1: 10b66d5b95a1642a64fe8baf050ddde438d6d867 SHA-256: 2e7c85700f7a6b73d71caa306c23e904485660c8d56c6f775cd5b0d90b337eea
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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
  • 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://crophysi.ru/123?utm_term=cyclist+body+transformation PDF link annotation
    • https://moninedowilex.weebly.com/uploads/1/3/1/4/131436981/wedumowiluvotag.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384159/normal_5ff946a1d30b5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452169/normal_5ff0d0d236d0e.pdfIn PDF document text
    • https://ledajesaler.weebly.com/uploads/1/3/4/0/134041179/8128732c706.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426408/normal_5feed6d0e41b4.pdfIn PDF document text
    • https://zujuwedidikaf.weebly.com/uploads/1/3/4/3/134375258/979143dcaf.pdfIn PDF document text
    • https://xasatodifugo.weebly.com/uploads/1/3/4/4/134439571/3955683.pdfIn PDF document text
    • https://jabudebixeref.weebly.com/uploads/1/3/4/3/134398441/xuxejapuguled.pdfIn PDF document text
    • https://butapakenora.weebly.com/uploads/1/3/1/8/131871909/9553317.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494452/normal_5fedda2d98566.pdfIn PDF document text
    • https://beluxavin.weebly.com/uploads/1/3/4/5/134507718/zudagusomotuma-ludilopom.pdfIn PDF document text
    • https://pisaloxonuk.weebly.com/uploads/1/3/4/3/134391291/5081614.pdfIn PDF document text
    • http://lovechat24.club/peavey_vypyr_75_amp_settingse2zg7.pdfIn PDF document text
    • https://nazawerud.weebly.com/uploads/1/3/4/3/134353719/2660868.pdfIn PDF document text
    • http://barberking.best/zewuviwobibaveramuno5wdjv.pdfIn PDF document text
    • https://zuxomizo.weebly.com/uploads/1/3/2/7/132710603/8054962.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/a39f3529-5a0d-487e-9737-88332929123e/ilive_sound_bar_wont_turn_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4546599d-6fd8-4516-b38f-ed66bd38b736/line_6_pocket_pod.pdfIn PDF document text
    • https://6762652a-e869-40f3-960d-1446d4066230.filesusr.com/ugd/55e6b1_6396e00a4de44ffda63861adac6b54b5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1cfe33f0-3125-4755-b466-d9699c447794/max_brooks_zombie_survival_guide_hrbuch.pdfIn PDF document text
    • https://c09438b0-f1cf-4ade-afa2-d322e048c450.filesusr.com/ugd/313cc6_865178d7bcb845109c533bec3173fe44.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_off0000ff7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7A 5312 bytes
SHA-256: 4b6abf1210d1022f881e497994e7a28190b2972b11158a58aee522fa72711ea1
font_01_sfnt_off0001117b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1117B 11120 bytes
SHA-256: 6533fa8bedbe8476b25ee29eabbad8ddcbf9bf67bcf84eb9bf29003d0cee8731

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