Malicious PDF — malware analysis report

Static analysis result for SHA-256 d55e27837d4936fe…

MALICIOUS

PDF

70.3 KB Created: 2021-01-01 21:34:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2022-06-20
MD5: 93f48d35d5b78533f6909733ba60d4ca SHA-1: b5551ccb0fa6e603b661d8ba675b041334c5ea61 SHA-256: d55e27837d4936fe032046026a8e32add23008f3955f5ae9e34bdb33b841b027
196 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://traffnew.ru/shook?utm_term=road+bike+wheel+size+explained PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374518/normal_5feb23a8f03b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414848/normal_5fd386e41e89c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369626/normal_5f9104ee1566a.pdfIn PDF document text
    • https://fozafilamo.weebly.com/uploads/1/3/4/3/134314768/rasogubobaxemuga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370987/normal_5fdbfe5c590e4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402519/normal_5fde07e5a8cd3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481990/normal_5fc83d99e0ae2.pdfIn PDF document text
    • https://sibujoxosuzeru.weebly.com/uploads/1/3/4/4/134499285/672c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367646/normal_5f9e3eae72ff6.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/safenalavojuwu/infant_high_flow_nasal_cannula_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/dell_poweredge_r710_service_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/black_magic_spells_that_work.pdfIn PDF document text
    • https://s3.amazonaws.com/zugutixe/health_information_technology_powerpoint_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/140af061-9fa1-438a-a98d-50f86dd792c0/61521301777.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/biotecnologia_industrial_volume_2_schmidell.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_off0000d766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD766 5372 bytes
SHA-256: 6495ed7e88c32460d86f471365ae74bb50ce637567a933c8ae0073b78b3c71dd
font_01_sfnt_off0000e9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C7 10288 bytes
SHA-256: 7a20aee4335e2f40cc13b8d37696832741b9eb5bc4c8b8612557463475fcf727

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