Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7b81c7c5e99529b…

MALICIOUS

PDF

69.1 KB Created: 2020-11-17 18:58:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9e2bcb5a9a745c502ab3a2ed1325bada SHA-1: c020d356f6b267dbd9cff22e6d87c309d35a1ed8 SHA-256: a7b81c7c5e99529b4d802c94f21802c4b8b4441ac1276c9cfde12e53e2fdba5e
244 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to disposable hosting or redirector services. The primary malicious URL identified is 'https://traffmen.ru/123?utm_term=victoria+secret+body+lotion+and+mist+set', which is flagged as a known malicious redirector. The document's structure and link farm behavior suggest it is designed to funnel users to malicious sites, likely for phishing or malware distribution, rather than providing legitimate content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=victoria+secret+body+lotion+and+mist+set In PDF document text
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/bodepoxuzuzuwoliw.pdfIn PDF document text
    • https://fujimerikav.weebly.com/uploads/1/3/4/3/134307110/c3e95a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426960/normal_5fb2ecd9c1ad2.pdfIn PDF document text
    • https://tibijipobarak.weebly.com/uploads/1/3/4/4/134493900/jutajoletegevil-nijoxura-zexus-rinufegim.pdfIn PDF document text
    • https://pixijitawe.weebly.com/uploads/1/3/4/5/134593468/munalakopego-mubozipidugep.pdfIn PDF document text
    • https://mufedagejex.weebly.com/uploads/1/3/4/7/134726032/vimimijidife.pdfIn PDF document text
    • https://pakovabe.weebly.com/uploads/1/3/4/4/134442852/fokujonasuv-benederulose-fitalo.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/81f52f36-1d72-4e0c-8cdf-8ffc32741ff7/84712298426.pdfIn PDF document text
    • https://s3.amazonaws.com/rixevozajixezos/49603529873.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c56570cf-486c-4fe4-a713-9a55d37fc2b9/goromexeniriwujedanumud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5a2ed20-613a-429a-9750-02353cd94ccb/24911103233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fdecfcdd-0176-4e42-82e6-207ce7dadf0e/lizaravisifenoresedax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/344cf64a-037c-41d2-86fb-c629116edcb2/41120404510.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bbbf683-21f1-4535-baff-b78cdc5cdf80/bigewi.pdfIn PDF document text
    • https://s3.amazonaws.com/bokofapig/15546815456.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_off0000d2f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F2 5292 bytes
SHA-256: 7eeec7aa4bf41cbacae5534c66895fbc18584f7e4968466d4307a5b049f14381
font_01_sfnt_off0000e4e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E1 10060 bytes
SHA-256: 05981ec1b5d0cbe99b63dc442349956392a9abfb3f148bc17483d57495c01d0f

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