Malicious PDF — malware analysis report

Static analysis result for SHA-256 14d4874440c95238…

MALICIOUS

PDF

65.9 KB Created: 2020-11-17 06:39:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dd9021bb346ada78234a890c1937e541 SHA-1: d0c6414ce4be250c8f2b774f7c1ef5b7cd91e7f6 SHA-256: 14d4874440c95238c3f0b547db4b8c03586f1a2f88bc6d36095b946bf2321f21
156 Risk Score

Malware Insights

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

The PDF document was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and an ML classifier indicating maliciousness. It contains a large number of external links, suggesting a link farm or a distribution point for further malicious content. While no scripts were explicitly extracted, the presence of embedded URLs and the overall detection profile strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=minecraft+village+church+blueprint
    • https://donodofi.weebly.com/uploads/1/3/1/8/131856097/9069355.pdf
    • https://molireju.weebly.com/uploads/1/3/4/6/134630509/7646461.pdf
    • https://beluloxepivizor.weebly.com/uploads/1/3/4/1/134131295/8279717f35298.pdf
    • https://bimidupixujeg.weebly.com/uploads/1/3/4/3/134319160/dezekipasijigosaz.pdf
    • https://xorusisu.weebly.com/uploads/1/3/4/3/134314808/0e98bc.pdf
    • https://nirafagasebop.weebly.com/uploads/1/3/4/5/134588809/540573.pdf
    • https://zuforupixonop.weebly.com/uploads/1/3/4/3/134394080/dobirepupoxoma.pdf
    • https://tijikazi.weebly.com/uploads/1/3/4/3/134373218/pimale.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bbd2e2aa-5262-4c53-9146-bd46e8c0dba6/supegoz.pdf
    • https://uploads.strikinglycdn.com/files/17fd6c10-62fb-43d8-9d43-a83c010dc88d/kijilopa.pdf
    • https://uploads.strikinglycdn.com/files/3bf04a2e-282b-4a51-9d75-0de8d5426b82/pippi_longstocking_free_download.pdf
    • https://uploads.strikinglycdn.com/files/506c0169-786d-40cd-b6e9-8d53614026ed/gebogijaw.pdf
    • https://uploads.strikinglycdn.com/files/6951b1e9-b595-45b5-b4d4-09e2a6a0c8ee/ghostbusters_pc_game_free_download.pdf
    • https://uploads.strikinglycdn.com/files/21c95e67-3814-4ffd-895d-df0ed974aa3b/52008669055.pdf
    • https://uploads.strikinglycdn.com/files/640ef7c3-1d5f-40bc-b121-1b5ec2e8b22a/refetiwejimigu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c63e.bin
3f2ce9b150441f75bc0c65ba9047e79effcf2e430e6c4be9442834669a3bc8f2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC63E 5304 bytes
font_01_sfnt_off0000d85b.bin
b247d561bfb0741e0ce3c7ec51bd6a2b5aafd29183357ff90172d5abbf6f56d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD85B 9908 bytes

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