Malicious PDF — malware analysis report

Static analysis result for SHA-256 089b14d6d12f5486…

MALICIOUS

PDF

73.0 KB Created: 2020-11-16 21:07:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f38eaaee7bc1f4938b986c708e1edce3 SHA-1: d2d5e9d381323b1d37b074c35c20366556564412 SHA-256: 089b14d6d12f54865eba4242d7e0e1c604629cab9f4cddf1baf7818ab160a5bb
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 0.9997

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://trafficel.ru/strik?utm_term=paperboy+strategy+guide PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393183/normal_5fae47b6e0fc8.pdfIn PDF document text
    • https://suzokixuvajix.weebly.com/uploads/1/3/0/7/130776208/ropabisefiporo_susisuxusu_fijode.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f8a15cb2e474.pdfIn PDF document text
    • https://rubisese.weebly.com/uploads/1/3/4/5/134589844/pepawagaja.pdfIn PDF document text
    • https://lulitetuxopibol.weebly.com/uploads/1/3/1/1/131164377/bac6b15f061a8b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4406782/normal_5f9412b7bd2f8.pdfIn PDF document text
    • https://rimesozarabef.weebly.com/uploads/1/3/1/6/131607712/wuloxogujot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419847/normal_5f9e19480d0f8.pdfIn PDF document text
    • https://suludizivot.weebly.com/uploads/1/3/1/3/131383823/1239403.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367311/normal_5f8f5dc085233.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465555/normal_5fa89bc7bdbf1.pdfIn PDF document text
    • https://xigokujote.weebly.com/uploads/1/3/4/6/134649591/c54c2d96444c852.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375894/normal_5f92768798f18.pdfIn PDF document text
    • https://tuxibefogeja.weebly.com/uploads/1/3/4/3/134359070/4234186.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393033/normal_5f9a0a1ce910a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461250/normal_5faf51d7be0a1.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/01ff5900-a3c4-407b-b39a-6d74c866862e/13822223781.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_off0000e145.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE145 5340 bytes
SHA-256: 73323c65b854281bae64ca55a63f1a96bb50f46a7316700b524a17b853963ebc
font_01_sfnt_off0000f37c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF37C 10624 bytes
SHA-256: 9f3fd3e5df5ebce0a075521f9c6de0f6ea94ad07b5591c0fd367e7f48b42f2be

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