Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde288a643d5be89…

MALICIOUS

PDF

68.9 KB Created: 2021-03-11 17:28:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 4b564ffe8fd7c6c0dc2c5113af4583ea SHA-1: a8d8dfe25b6b7789f6d8eb611f2ab321cdcf2aa7 SHA-256: dde288a643d5be8985b664bf6fbe3505be6d95453b520e08ddf1dd9282453a33
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://vilenefex.ru/award?keyword=bluebook+20th+edition+pdf+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4401505/normal_5fe8f446b757a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382621/normal_5fd62b1d4d8fc.pdfIn PDF document text
    • https://gosalojuwik.weebly.com/uploads/1/3/6/0/136050429/91781c9fc.pdfIn PDF document text
    • https://xarojitoma.weebly.com/uploads/1/3/5/3/135305856/6039960.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369522/normal_60025c9571c44.pdfIn PDF document text
    • https://wexopusipomela.weebly.com/uploads/1/3/5/3/135313487/5890152.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426942/normal_603c2d7c14fc6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387410/normal_6011518aa8919.pdfIn PDF document text
    • https://lawukexudemodu.weebly.com/uploads/1/3/4/0/134041757/bae9de.pdfIn PDF document text
    • https://buwigare.weebly.com/uploads/1/3/5/3/135308802/mijisu_lowejunikaja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419846/normal_600e3749b3964.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477139/normal_5fe2bae441fd3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386334/normal_5fda78ae194a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451551/normal_5fe0c33cc179b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://3e021c9a-284a-4c54-9ba1-f6d43d4d2ba5.filesusr.com/ugd/a619af_b96c76de6a7d43f3bb5e63393590269a.pdf?index=trueIn PDF document text
    • https://e1eccfe9-8888-4f52-a155-e9c8e84e0752.filesusr.com/ugd/4fb05f_5486f57447c14d34be33b99fe05a25d3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/28356e0c-39e5-41ba-9ccf-b79a2a518329/53878972903.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/54310026138.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e59d1cc9-12f1-4bdf-b3cc-12ab6dc7eeaa/29275255784.pdfIn PDF document text
    • https://s3.amazonaws.com/muvazi/5258711041.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/72984310967.pdfIn PDF document text
    • https://7afcd0b8-98df-42a4-afe0-9544d44c9539.filesusr.com/ugd/74e9cf_476f40cb64164c82bcef07a70bc81845.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/rowubunak/baldur_s_gate_enhanced_edition_walkthrough.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_off0000d009.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD009 5268 bytes
SHA-256: 2d0dde00bb8771b56d7463930c23f351f7389b7dbf0b4475f929e92575c66e69
font_01_sfnt_off0000e1f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F5 10656 bytes
SHA-256: df8b82e0e69e950d89b2a401a539a7fcd242e3aa62e6422893e0ad1290e5c34f

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