Malicious PDF — malware analysis report

Static analysis result for SHA-256 49fc3faa2c6db8a5…

MALICIOUS

PDF

71.4 KB Created: 2021-02-28 02:57:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: d7355736f159807ed6de37b9fc4d2906 SHA-1: 63e79bf6dec73e9184b2704bb01dffda05c5d52a SHA-256: 49fc3faa2c6db8a5c47f728afec7c524664a8b261c674cd9c5065c6ee7a826ee
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/award?keyword=memento+mori+ring+poison PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470537/normal_5feb8b7d30260.pdfIn PDF document text
    • http://lupelisizi.medianewsonline.com/how_much_does_periodontal_gum_surgery_cost.pdfIn PDF document text
    • https://bolukuja.weebly.com/uploads/1/3/0/7/130739437/ranirapuxetepupupepi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465905/normal_6023da00ed059.pdfIn PDF document text
    • http://rowexusaje.mypressonline.com/juxavago.pdfIn PDF document text
    • https://dezubawutojowi.weebly.com/uploads/1/3/1/3/131398539/8462210.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367650/normal_60011be6c125c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376849/normal_601f7f9f936c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373782/normal_5ff97f81d677d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446491/normal_5fcee8cb74ab8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404290/normal_5fe7a196374be.pdfIn PDF document text
    • https://lavidibiw.weebly.com/uploads/1/3/4/5/134582964/f8e5a.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/fevobelijogal/xinakugiwonulakexatovin.pdfIn PDF document text
    • https://s3.amazonaws.com/jadudusujuje/panexezudi.pdfIn PDF document text
    • http://vejegaba.atwebpages.com/xedop.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_off0000da59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA59 4900 bytes
SHA-256: dcad8327eabc254f5f02133bb4a32cb107cfa75b1bef5bce2965972885768147
font_01_sfnt_off0000eb05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB05 11152 bytes
SHA-256: 38b4be0203645107727c9b180b1b837d75968a4d8eda02b73eb23b5cfe8a63eb