Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1680b881218c8ad…

MALICIOUS

PDF

75.3 KB Created: 2021-01-02 00:29:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 545b8217c8ec0f3a13f4d145535a6552 SHA-1: e80e1d708b1a1cf2f8a6ff5197ffe441b171cec2 SHA-256: f1680b881218c8ad7fa79c326ce2c2d6b56310210900691ac8f2e69c2a67f383
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, many of which point to other PDFs, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://traffine.ru/123?utm_term=granulocytes+and+agranulocytes+function PDF link annotation
    • https://pagafamowadaf.weebly.com/uploads/1/3/4/8/134878907/1813070.pdfIn PDF document text
    • https://duparumiwope.weebly.com/uploads/1/3/4/7/134707207/jefikiviwazixuja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495839/normal_5fbdf94d834a1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393370/normal_5f948f6c1f149.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454670/normal_5fa234e727d83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367919/normal_5f897a69f1de7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378170/normal_5f8c95c9eae7b.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/0fdef3ee-d569-4b4f-bab9-7f8f570c4cfb/super_mario_crossover_2_newstudyhall.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/138a7f54-6635-4fc6-97cf-1eb79fa13957/74142393403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f57f4de8-459d-4fed-b4f4-30d0131bd2dd/gun_sounds_download_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12c5c917-831e-4215-b604-645617a3f1b3/2384466769.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/099ac1ac-dd45-44ac-9fd1-9419657c8a64/polanifolur.pdfIn PDF document text
    • https://s3.amazonaws.com/sitok/vigesazeb.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_off0000ed96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED96 5320 bytes
SHA-256: 72c84ee62947ed8bd7e7ad125f3dd30f7692132d068161fe06a1851b8bd9db6c
font_01_sfnt_off0000ffcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCC 9560 bytes
SHA-256: 632fb65e4127d95b503d26911c9f867bf91678757d24c916123638b90df838cf

Open this report in the interactive analyzer, or submit your own file for analysis.