Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8c29e0d7a237cc6…

MALICIOUS

PDF

69.0 KB Created: 2020-11-25 12:23:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 8cde617531fc63d7ae641a5e92781179 SHA-1: 09cfdd82a24a6c7372697840156fcd81a2a1a350 SHA-256: a8c29e0d7a237cc67eeb4c7980c8e79f7bfe323bf67c682e4f8afb20aef07187
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 of which point to SEO-optimized PDF documents, suggesting a link farm or phishing campaign. The primary external URL identified is https://trafftec.ru/strik?utm_term=rowenta+pro+iron+steam+station+dg5030+manual, which is likely used to redirect users to malicious content. No scripts were extracted, but the overall structure and URL patterns are indicative of a phishing or malware distribution attempt.

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/strik?utm_term=rowenta+pro+iron+steam+station+dg5030+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416791/normal_5fa50ee604947.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366376/normal_5faa3744f3e9d.pdfIn PDF document text
    • https://bogadisosupotaj.weebly.com/uploads/1/3/0/7/130776541/3170359.pdfIn PDF document text
    • https://zabapekiji.weebly.com/uploads/1/3/4/4/134470890/1e7aa27b.pdfIn PDF document text
    • https://niwejeru.weebly.com/uploads/1/3/4/3/134308800/siwejutifub.pdfIn PDF document text
    • https://sisaseno.weebly.com/uploads/1/3/0/7/130776680/vepolekiwa.pdfIn PDF document text
    • https://bimidupixujeg.weebly.com/uploads/1/3/4/3/134319160/e9a66.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/9417afad-190f-4077-926e-0ffb4b1676e1/monster_hunter_world_aqua_sack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d9ee60e-86aa-4e86-be9c-de4115e836e4/dome_or_helix_fossil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcbb0b0b-49de-487a-a269-9792e6738ad9/64365341321.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7be8d4de-7a16-4e59-a802-28e9922b8830/60431216038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/393a8b6d-168d-4949-9490-ae65bbf79b86/62197370337.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/034e9a19-56a2-4eaf-acb4-98c1e18983b1/biochemistry_textbook.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_off0000ce20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE20 5808 bytes
SHA-256: 95d6c41a818f2a7040c97f6335b72a5351bd78691edb791e345459cad8599e23
font_01_sfnt_off0000e1ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1EC 10588 bytes
SHA-256: 176f3d7fd2cb526ab5e2ca6ea1bfa96fafc8f226dad7cf2440105696d3b63e10

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