Malicious PDF — malware analysis report

Static analysis result for SHA-256 76151a68cf727073…

MALICIOUS

PDF

68.0 KB Created: 2020-12-03 20:35:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 46ffd981aba3ff38a98db7ff2c0b977c SHA-1: 2e468819ad8b145e786b59bcbf0efcb009f390de SHA-256: 76151a68cf7270737eb685df10521d8ac2f2cfe197d74b7bcbcd0be4080a0358
156 Risk Score

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/strik?utm_term=dyson+dc39+manual PDF link annotation
    • https://moxitasa.weebly.com/uploads/1/3/1/4/131454719/c385a54d925d.pdfIn PDF document text
    • https://mejodedasebedo.weebly.com/uploads/1/3/4/7/134725949/werumuzupanitimuwiw.pdfIn PDF document text
    • https://vamugibamapiju.weebly.com/uploads/1/3/4/5/134588186/pujaxefol.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://static1.squarespace.com/static/5fbfe7e212facd59cea75dab/t/5fc22b6ca97599144e403b79/1606560621008/95769231181.pdfIn PDF document text
    • https://s3.amazonaws.com/mukut/kings_fund_population_health_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zunewidimem/55590033162.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdef429d793648405372bd/1606283075183/38115097825.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc32a51cd1e280355e2ea57/t/5fc523403570fb44d1a7a036/1606755136515/atkins_physical_chemistry_10th_edition.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d8d024b06a7eb3fedc56/t/5fc2f75a1972c46e3c005ca5/1606612827494/elize_du_toit_rafe_spall.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d70dc14dfd36fef128e0/t/5fc1ce6b145a8629dcf35fee/1606536812392/25039016742.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d52e3dfdd95b60d4bb65/t/5fc0f1a23570fb44d1251d86/1606480293922/92649385580.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_off0000bf5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF5E 5044 bytes
SHA-256: ec7360c53574a2137ae13d477ef5c6d830db205a7fee0fdfe31e08aa231d76df
font_01_sfnt_off0000d05e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD05E 10784 bytes
SHA-256: 9e8fb8265caf36dfddca00c4347e2003beb8df22d696a1324e6a40f8ceeba82c
font_02_sfnt_off0000f531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF531 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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