Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2a1222c7f020c25…

MALICIOUS

PDF

70.1 KB Created: 2020-12-17 05:53:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: a754b70b76b013c27f62c998b3eb4f5e SHA-1: 31b3f82546cebf3cf3f63a291523045d47692d54 SHA-256: f2a1222c7f020c25e0b0eba7c1097e95b54d99fe5d2b6d0f7f4cda19f58a39b7
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://trafffi.ru/strik?utm_term=sanskrit+learning+books+in+bengali PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479674/normal_5faeff95cd66e.pdfIn PDF document text
    • https://ganokupojedozo.weebly.com/uploads/1/3/4/8/134890080/ae17e31.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/levovod/27739826278.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc567426b97992eb579db2d/t/5fd149a14f86bf06815f3d6b/1607551394229/kijep.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/64308716277.pdfIn PDF document text
    • https://s3.amazonaws.com/safenalavojuwu/odia_dj_song_website.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/zujamu.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/biostatistics_in_public_health.pdfIn PDF document text
    • https://s3.amazonaws.com/padadutiseni/33285945248.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/4023917812.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/wirira.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c80f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC80F 4948 bytes
SHA-256: 83eab08c88695c6c8633a3db3ae3c2633888cfbf70e5701b848a37a2c0f33d9e
font_01_sfnt_off0000d8e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E0 11088 bytes
SHA-256: 1253ffe1f5ffd5f9a4f53ecf940ef2179efcbb0b7d76a7f56c6982f7bfa89299
font_02_sfnt_off0000fdba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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