Malicious PDF — malware analysis report

Static analysis result for SHA-256 93c68c492576f321…

MALICIOUS

PDF

82.6 KB Created: 2021-01-14 03:22:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 6fd7866e6ab6c5bdc3995ec432951b95 SHA-1: ee48d5351d58f2130c9652f5601695c9c605f71c SHA-256: 93c68c492576f32114aa2480e720a35ef2ec9a73b0880405858a7c368850a40b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains numerous embedded URLs, suggesting it functions as a link farm to distribute phishing content or malware. The presence of many distinct hosts and disposable hosting services further supports this assessment.

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 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://traffset.ru/wb?keyword=formula%201%20race%202019%20abu%20dhabi PDF link annotation
    • https://site-1176136.mozfiles.com/files/1176136/gina_guidelines_2019_ppt.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456122/normal_5ff6d196a096b.pdfIn PDF document text
    • https://site-1203881.mozfiles.com/files/1203881/58963741880.pdfIn PDF document text
    • https://cdn.sqhk.co/xuxiropuwomo/1Ciejcb/56391449569.pdfIn PDF document text
    • https://site-1172834.mozfiles.com/files/1172834/79840974260.pdfIn PDF document text
    • https://site-1225090.mozfiles.com/files/1225090/44993984945.pdfIn PDF document text
    • https://cdn.sqhk.co/kokedipemi/gCSS4ie/65543506503.pdfIn PDF document text
    • https://dabituge.weebly.com/uploads/1/3/4/3/134344098/8412748.pdfIn PDF document text
    • https://fibuwuvonej.weebly.com/uploads/1/3/4/2/134265895/larapusugutasiza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409107/normal_5ff0bba39464a.pdfIn PDF document text
    • https://site-1172440.mozfiles.com/files/1172440/joxekemisuwiremebusejivi.pdfIn PDF document text
    • https://xafixefar.weebly.com/uploads/1/3/4/7/134714422/4299332.pdfIn PDF document text
    • https://site-1177585.mozfiles.com/files/1177585/zirevowoxevasagefa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/xokebore/34219748291.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF925 5272 bytes
SHA-256: 7e243128a14d0c8a53386ac5ee62b4a8683b379859156f01e0dd3af8b99305ae
font_01_sfnt_off00010aff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AFF 10664 bytes
SHA-256: 61a72d5911ce6d64afe64322e25982ea52e4a5ad259ec870ca4bdcc99579aacb
font_02_sfnt_off00012f46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F46 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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