Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d6038ce67500156…

MALICIOUS

PDF

65.8 KB Created: 2020-12-04 10:52:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 44ad048bbb7e3c782482d3fb6a13f5e4 SHA-1: eddb5f791b103aac42106dbb7b2c2b9ce5da868a SHA-256: 0d6038ce67500156093a9239776c62bc51e1e0352913dbfbed4ed20a8a295858
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate an attempt to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/aws?utm_term=avery+design+and+print+uk PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422638/normal_5f9c2c529a34f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373749/normal_5f9080f2abf9d.pdfIn PDF document text
    • https://fabapetabi.weebly.com/uploads/1/3/4/6/134687037/tusuzagetax.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/tojabixefova/8327936748.pdfIn PDF document text
    • https://s3.amazonaws.com/vapite/html_online_quiz_with_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/stoker_hd_movie.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50480ec917750a3f21de4/t/5fc63d2b3485235c869b45bc/1606827309431/pallant_spss_survival_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9dba987a-576f-487c-97a1-80fbb5891f36/gajewagenegezofuxiba.pdfIn PDF document text
    • https://s3.amazonaws.com/xonobijikivo/29644312199.pdfIn PDF document text
    • https://s3.amazonaws.com/felasorarabipis/doruxoxabobajetogo.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/zekifu.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_off0000c53f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC53F 5308 bytes
SHA-256: 5332ad18ec35c33ad9c98ada7ad6cdf477c980b8bdcf4b1fbd2e5f450ad8d4df
font_01_sfnt_off0000d776.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD776 10176 bytes
SHA-256: 3c372ac0234cfc3f0bf9343d8584d8c8a862039de1a55349c950237330beb88f

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