Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd6d27e33122c03…

MALICIOUS

PDF

75.4 KB Created: 2020-12-27 16:02:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 4a5137057c4584a7d940cdff722b71e2 SHA-1: b799cd75c71851ec8eb31c8bd4376105547d4bf3 SHA-256: ddd6d27e33122c03bfd132a3caec6b886075d1ea9a2970f3b11831d61229caf5
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggest the document's primary purpose is to redirect users to potentially malicious or unwanted websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=root+board+game+faction+combinations PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4385012/normal_5f8c59c3c20c4.pdfIn PDF document text
    • https://siroxejuvumuku.weebly.com/uploads/1/3/4/6/134657252/6974478.pdfIn PDF document text
    • https://ledijonag.weebly.com/uploads/1/3/4/6/134689342/100d0a396bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488855/normal_5fc37be670a63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383689/normal_5f9e12e26ac18.pdfIn PDF document text
    • https://ruregojuze.weebly.com/uploads/1/3/2/8/132814589/9352908.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369310/normal_5faa72686e2ed.pdfIn PDF document text
    • https://sojutobifedurex.weebly.com/uploads/1/3/4/5/134588439/4aeaac4734057a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445531/normal_5fba64358c9f3.pdfIn PDF document text
    • https://kekisadubivef.weebly.com/uploads/1/3/3/9/133986731/356613.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468836/normal_5fe5d00004a23.pdfIn PDF document text
    • https://vodexekuteb.weebly.com/uploads/1/3/0/7/130776001/pilukane_vegezefuromi_pawonurat_puxopudofifa.pdfIn PDF document text
    • https://palukenibimel.weebly.com/uploads/1/3/4/4/134401756/9002694.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/minaxigevani/red_black_tree_algorithm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a10d36e-e02b-43db-a059-75faf8f706fa/keliwokagasuwum.pdfIn PDF document text
    • https://s3.amazonaws.com/vatosolikijike/osrs_murder_mystery_bob.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_off0000e9f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F0 5456 bytes
SHA-256: c932ae3c440c9b795bffff64f14d349bfee537d0b1d01d2f374246f16713e2f0
font_01_sfnt_off0000fc6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6F 10552 bytes
SHA-256: 4c5c426009e5b7c505a7d562a0e99e816e1f6d4494e1c1970631034bea5d8ebe

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