Malicious PDF — malware analysis report

Static analysis result for SHA-256 864fe2b96c0da553…

MALICIOUS

PDF

62.8 KB Created: 2020-12-11 18:06:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: a93906cc4759528572b5c355fa15f2c8 SHA-1: 9ae1e246f55c493897e6028c1872ece2120ef9db SHA-256: 864fe2b96c0da55386ef666e5af76e1753f026246fcbaf99ac09243c0ebf535f
164 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. It uses an urgency-based lure. 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 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffnew.ru/strik?utm_term=first+coast+cpr+fernandina+beach+fl PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404112/normal_5f92a98d459e6.pdfIn PDF document text
    • https://gebapawuvafiv.weebly.com/uploads/1/3/4/5/134519736/dd5582e18e.pdfIn PDF document text
    • https://pupazugosabi.weebly.com/uploads/1/3/4/8/134868946/maxivifazezij-poked.pdfIn PDF document text
    • https://furutivox.weebly.com/uploads/1/3/4/3/134360368/mezetilelagomenixa.pdfIn PDF document text
    • https://komamopiragi.weebly.com/uploads/1/3/4/4/134444029/fizedivovidag-lijowu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc512c9bf71053ccb2aa307/t/5fc55d0008845d09243db9f2/1606769920771/netira.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4baa7dc-468c-40c0-ac0e-e675a53f1ec9/35073114134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac30d258-8142-44b2-869a-8bdc522d861c/xudotulasipuwabuvulanij.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc5d3e7a87939686429f1a7/t/5fc61a7ff8cdb769c6b42b1a/1606818432037/exorbitant_antonym_deutsch.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47e333b6-b269-488d-bb41-35bef1d99439/13644044395.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/101a9cc2-5f30-453c-a6e2-8f09bd297341/sojuxofobaduwagonezogise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/001866d6-9722-4eb1-ac58-fb186bd566cf/42167576344.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_off0000b78b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB78B 5340 bytes
SHA-256: 25bb02a514982f22c882523e1f4dc2b3ece7108d3e47fb39eaa509410ffe31cc
font_01_sfnt_off0000c9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A9 10912 bytes
SHA-256: ae64b08d8ea548265ae7edfec2cf1e40979418cfd847a182bd2b4c5c2178e862

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