Malicious PDF — malware analysis report

Static analysis result for SHA-256 13100e2744235790…

MALICIOUS

PDF

69.0 KB Created: 2020-11-23 11:33:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9d782877ad894dc7f69ef32103729c37 SHA-1: 19c44630044bca092287e1baa83f6fc4c5467ff1 SHA-256: 13100e27442357904062f0943b49dabbf2782043971512aa07cfc95f7bca898e
156 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 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=autometer+oil+pressure+gauge+line+kit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4443371/normal_5fa8cb8cdcf12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367952/normal_5fa78f271deb2.pdfIn PDF document text
    • https://nategenuniko.weebly.com/uploads/1/3/4/7/134749174/waturikene.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449622/normal_5fa87fa397b02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419415/normal_5f963e2460e55.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379217/normal_5f94f7a6bf5dd.pdfIn PDF document text
    • https://wukonoru.weebly.com/uploads/1/3/4/4/134441013/noxuxevinebilug.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500669/normal_5fb717586025a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451567/normal_5f9f9cf1645f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463262/normal_5fac10422d765.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393759/normal_5f906ee5bd375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391899/normal_5f964ab5a56e8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/words_that_start_with_ron.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_off0000d179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD179 5192 bytes
SHA-256: 785521708aab4bfeee65cae1a7d567cf8f022020fc8c715ee01f61b602ad4003
font_01_sfnt_off0000e310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE310 10588 bytes
SHA-256: 00c2afe1700d384ca8421907560af5da02b83fc9553b21ac231816a90c85e2a2

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