Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9e569e1aec2e81a…

MALICIOUS

PDF

75.1 KB Created: 2020-12-31 02:59:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6bed93dc088d6f8e15b895de0d29f583 SHA-1: e80388efc5915f25aa903d7db68b8d1436feb6a7 SHA-256: b9e569e1aec2e81a770911153acdfca4b420ab4bcfb97d692e23da2b78edf7c3
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, many pointing to Weebly-hosted PDFs, suggesting a link farm or SEO manipulation tactic. While no scripts were explicitly extracted, the PDF structure and the presence of external links indicate an attempt to redirect users to potentially malicious content, possibly for phishing or malware distribution.

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://trafftec.ru/123?utm_term=144+oz+to+gallons PDF link annotation
    • https://vewenaloviriwu.weebly.com/uploads/1/3/2/8/132816087/xogoja.pdfIn PDF document text
    • https://jumolemema.weebly.com/uploads/1/3/4/8/134853288/julakanuduvazer-magolidewelus-kifep-fulufebawaso.pdfIn PDF document text
    • https://bisatabezuniv.weebly.com/uploads/1/3/1/3/131398333/kozaz.pdfIn PDF document text
    • https://lifalaril.weebly.com/uploads/1/3/4/8/134883644/demowewu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413697/normal_5fd260ec01643.pdfIn PDF document text
    • https://bexatumabe.weebly.com/uploads/1/3/4/8/134852132/80b251b2.pdfIn PDF document text
    • https://cdn.sqhk.co/womibakok/ghiinUH/67385122983.pdfIn PDF document text
    • https://nakalefa.weebly.com/uploads/1/3/4/5/134522788/3b5b0186b499fb.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/wenobagupexekap/lokuf.pdfIn PDF document text
    • https://s3.amazonaws.com/zazelujeju/fill_in_the_missing_number_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/falevi/nemeduxafuzewidoziril.pdfIn PDF document text
    • https://s3.amazonaws.com/zevutebulaworel/cebuano_mass_songs_lyrics_and_chords.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d3dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3DC 4852 bytes
SHA-256: 2e6bf61e1868568c9a2c36f02099149a19e03952f2602abd4311a551873f9a89
font_01_sfnt_off0000e487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE487 11072 bytes
SHA-256: 39e86ee7fa5941fa51b1d64545a7a5cf410ce2c37246903fcf21330439111f64
font_02_sfnt_off00010a95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A95 16216 bytes
SHA-256: 70f40d70559aacc935f14be6aa78542955531c8ec73b35d0bb8c03e7c63a2f02

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