Malicious PDF — malware analysis report

Static analysis result for SHA-256 250fc024194b6a57…

MALICIOUS

PDF

83.9 KB Created: 2021-05-18 01:39:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: c1eb723546a616212373ddb563f1c408 SHA-1: ad23a4124c9715f9f8ce98e674a8f1f338f303e5 SHA-256: 250fc024194b6a579c9c881c5a3ee64a3fa8f3cbf9e219c39955ebaf905bcead
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file contains numerous external links, identified as a link farm, and is flagged by ML classifiers and ClamAV as malicious. The document body, though heavily obfuscated, suggests a lure related to game codes, likely intended to direct users to malicious sites for phishing or malware downloads. The presence of external URIs and the link farm heuristic indicate an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://kuzutuzo.ru/strik?utm_term=roblox+woodcutting+simulator+codes+2018 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367287/normal_605d762ea6e96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381759/normal_60602a3f79156.pdfIn PDF document text
    • https://xifugewelude.weebly.com/uploads/1/3/4/3/134353264/608628.pdfIn PDF document text
    • https://lulofaki.weebly.com/uploads/1/3/1/4/131453598/kanekedajenuku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490524/normal_60414e38d2621.pdfIn PDF document text
    • https://bativazuwa.weebly.com/uploads/1/3/0/9/130969541/59e5710bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411245/normal_600ff293db9d1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480588/normal_6068da098d67d.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/edfb1aeb-b0a7-4c74-a909-6cad86f13a25/foxit_editor_serial_number.pdfIn PDF document text
    • https://s3.amazonaws.com/rorives/cradle_to_cradle_design_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12907f8e-6dcf-4951-badc-0a625b17513e/gifegumaxiwefugo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/376bfb71-7f57-4597-be66-169c9b3de69c/fanosunusakaselubi.pdfIn PDF document text
    • https://s3.amazonaws.com/dalava/wegiwetokamone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65094f72-79e4-4f07-b3ee-7bf6e5d92e87/xolozuremerabanolaje.pdfIn PDF document text
    • https://s3.amazonaws.com/vuliwisuwig/wow_destruction_warlock_arena_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xozeb/fipajaridosip.pdfIn PDF document text
    • https://s3.amazonaws.com/buwosevax/diwipanezifej.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010695.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10695 6084 bytes
SHA-256: 4fe8558a2ca35861270dedfffcb7fe700f113d49833398b75975f30928e467f0
font_01_sfnt_off00011b4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B4B 11428 bytes
SHA-256: 7f46ca23ff95f5b67b7dd07d6a94aa6da3dc41d1ec4f03d696e80b22c6235085

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