Malicious PDF — malware analysis report

Static analysis result for SHA-256 72281bf65682c57f…

MALICIOUS

PDF

65.8 KB Created: 2021-01-02 16:42:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 554211a8ee3ac0706b888d51553c5a80 SHA-1: 71ad7ae0564f51e79e7f89aa57a16c2588f439fe SHA-256: 72281bf65682c57f74bb0f87256f9f72d61de33ad59e62fe7d3546dfb2419119
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://traffset.ru/wb?keyword=how%20to%20draw%20cartoons%20for%20beginners%20youtube PDF link annotation
    • https://lonexuganaj.weebly.com/uploads/1/3/1/8/131856054/9c688.pdfIn PDF document text
    • https://jileninaniwepuz.weebly.com/uploads/1/3/4/7/134771173/nisenup_paxosaxapovamen_sedol_gazuxugawexonef.pdfIn PDF document text
    • https://lurexiji.weebly.com/uploads/1/3/4/5/134594132/pefexiwaxivavo.pdfIn PDF document text
    • https://wukelefitifaka.weebly.com/uploads/1/3/4/8/134882985/buzavojapo_tufijomasunoko_jemideli.pdfIn PDF document text
    • https://guboriratuji.weebly.com/uploads/1/3/4/2/134235556/xugodapobaribado.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405895/normal_5fb0420a6e55a.pdfIn PDF document text
    • https://sagoxanoku.weebly.com/uploads/1/3/4/3/134350044/lejajifotinowu.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/vinivuxo/34870559354.pdfIn PDF document text
    • https://s3.amazonaws.com/saxefi/lafajeg.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/nobofo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68e86900-6f45-483f-a472-1ae592a494a8/86882499047.pdfIn PDF document text
    • https://s3.amazonaws.com/sorapobuk/96534567925.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/99269991068.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2186aeb-8912-4813-8809-e5a57e57c49f/jizowemo.pdfIn PDF document text
    • https://s3.amazonaws.com/zoluwivebiro/11798302115.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_off0000c5b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5B3 5452 bytes
SHA-256: a7da0585a4aecde60da3e354056a0e61364e4abbed8e652c0c9c16d8b13fc1a3
font_01_sfnt_off0000d861.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD861 9860 bytes
SHA-256: 3a0f01ab5c5f2464b213ff90d9e8c5144e25b082596b2bc1724910b07c309c54