Malicious PDF — malware analysis report

Static analysis result for SHA-256 d084e2964ecc358b…

MALICIOUS

PDF

78.4 KB Created: 2021-04-17 02:14:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 22a0f6d927850031806fcf713fac9433 SHA-1: 06b004378339fb875054cc8f40c06768f004f321 SHA-256: d084e2964ecc358ba66dd14de25e658b4eecf60c4fbae50bccff22195ba207ed
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://lozipotod.ru/strik?utm_term=can+i+freeze+light+cream PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4407314/normal_5fe2856a2fc34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486971/normal_6040a41e99098.pdfIn PDF document text
    • https://cdn.sqhk.co/buganisazobu/HjeShfi/cruising_guide_publications.pdfIn PDF document text
    • https://mabelemaje.weebly.com/uploads/1/3/4/7/134705401/8398507.pdfIn PDF document text
    • https://mibugekokedepi.weebly.com/uploads/1/3/2/6/132682655/d9f7ecccd.pdfIn PDF document text
    • https://cdn.sqhk.co/sejujona/gdZpjjb/bimijiwexezidisareraze.pdfIn PDF document text
    • https://sedawuxel.weebly.com/uploads/1/3/5/3/135326539/tasumokokezose-mupesero-pesuzu.pdfIn PDF document text
    • https://gumakamatiz.weebly.com/uploads/1/3/4/6/134600955/rigobobafosefus.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409093/normal_6043272deba25.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://1c019786-7048-4615-837a-ae53f087c4ae.filesusr.com/ugd/8b4172_c54a3ec85bed4b22b7c541159705c355.pdf?index=trueIn PDF document text
    • https://0296ecfc-28ae-4fa5-925c-67a25994cace.filesusr.com/ugd/c88839_21c638b7bbd54e408a957f0b73eea8a4.pdf?index=trueIn PDF document text
    • https://a62e46b8-d933-4087-892c-e5439cec6991.filesusr.com/ugd/e9cba9_ea31425ec9ab426d9ab40a524f4394e9.pdf?index=trueIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_992d49aa7752493d8c2eeb28581d9840.pdf?index=trueIn PDF document text
    • https://8a833fea-7c9a-4d2e-a5a7-d3590f42a3e5.filesusr.com/ugd/9aab09_52b836a49959456ebb0008a9e579237e.pdf?index=trueIn PDF document text
    • https://85d2c5a2-fc31-4f76-86b4-4ebe2abe2bf4.filesusr.com/ugd/a8cc01_a69cc030a3a2476e8f042e64d5589fed.pdf?index=trueIn PDF document text
    • https://eb40363d-1d1f-4170-a897-f23f0f433116.filesusr.com/ugd/2a1429_7afa4c4139514b58a1a2ac8e8c4137cc.pdf?index=trueIn PDF document text
    • https://893c8be9-d140-4a04-8a3e-66bd54b472cd.filesusr.com/ugd/efd7ea_3f1bb87023da402e9875ae2cc7a7da96.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_off0000f59e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF59E 5072 bytes
SHA-256: eefffc964d4c5d9e21edf336d867e31630ee0bdf6cf3640cf01a71497743dda8
font_01_sfnt_off000106c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106C0 11256 bytes
SHA-256: 93e9b7590f3fccd1a509c79332b5a6882b2609bc2dadffc6a56a85378d336e39

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