Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a184287ea58e573…

MALICIOUS

PDF

75.0 KB Created: 2021-01-03 03:11:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d295fceaa3298792bf40e22e87009b75 SHA-1: 7994a476efd4ea4daf6873e479e3c13ec47161cd SHA-256: 5a184287ea58e5739e1ef3809b630c8e1debf3cfcba135de8feb4adb10924262
214 Risk Score

Malware Insights

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

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a redirector and a link farm. It contains numerous embedded URLs designed to lead users to external sites, with at least one URL pointing to known malicious infrastructure. The document body, though heavily obfuscated, appears to contain keywords related to marketing and subscriptions, suggesting a phishing or scam lure.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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=amazon+prime+-+direct+marketing+-+continuity%252Fsubscription+merchants In PDF document text
    • https://cdn.sqhk.co/ruxuvedije/tjgicSv/neuroshima_hex_3._0_the_year_of_moloch.pdfIn PDF document text
    • https://gebulofafilo.weebly.com/uploads/1/3/4/7/134717894/televoxoku_xosegotorugavow_ribilakoma_topomadimu.pdfIn PDF document text
    • https://degegoza.weebly.com/uploads/1/3/0/8/130873855/8430561.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366982/normal_5fc51ce556de5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370097/normal_5f92584cb97cc.pdfIn PDF document text
    • https://cdn.sqhk.co/munemuzabuk/jeBghgf/64084790681.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472208/normal_5fd3a17b251d6.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvidomanale/b9ih91A/primary_color_wheel_hair_coloring.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4444378/normal_5fc66435238a3.pdfIn PDF document text
    • https://cdn.sqhk.co/kurotevu/fgdAhd2/nudokaxizi.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/rutufokedizon/mowufo.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_off0000e390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE390 5868 bytes
SHA-256: 6378c9ecf6ce7bfd7e2ff06122b2df050e78da9a63e7d7d5833a8985ae3c6615
font_01_sfnt_off0000f77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77C 11632 bytes
SHA-256: d9cac2034b52479bbe370cf063bb6c32a352cc05f03507dfa625bd5c6824c2ae

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