Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf90c2bcb38b0081…

MALICIOUS

PDF

73.6 KB Created: 2021-02-25 13:52:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: a396950c9c45f825d27b56eedd97bf3b SHA-1: 7e8370b91e339410cdca49ce133bb1f6ecc21660 SHA-256: cf90c2bcb38b00816968c165bd0571f06165eff5098638f64627850eebc1e182
186 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.
  • 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://baarspo.ru/award?keyword=how+to+become+a+food+safety+inspector PDF link annotation
    • http://sevowina.medianewsonline.com/71580269855.pdfIn PDF document text
    • https://rakevuxex.weebly.com/uploads/1/3/4/0/134040666/7440706.pdfIn PDF document text
    • http://help-copyrightviolationhelpcenter.com/5876152512708a4l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424400/normal_601e28be21f2f.pdfIn PDF document text
    • https://sogifeni.weebly.com/uploads/1/3/2/7/132712483/3601372.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/computer_motherboard_repair_guide_in.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376380/normal_5ffe9e9e6e861.pdfIn PDF document text
    • https://suzitarux.weebly.com/uploads/1/3/4/6/134683800/rafaxuxebigerix-pakazatiwije.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380380/normal_5ff9cf8662d56.pdfIn PDF document text
    • http://idealica-italiaoficial.site/john_deere_6410_repair_manual9636r.pdfIn PDF document text
    • https://fikugutadopoxas.weebly.com/uploads/1/3/4/3/134340330/3300179.pdfIn PDF document text
    • https://wemuxafav.weebly.com/uploads/1/3/4/8/134860001/4135748.pdfIn PDF document text
    • http://raftgjgr.space/how_much_does_an_interior_designer_make_in_texas4227g.pdfIn PDF document text
    • http://thrivewebs.com/understanding_the_bouguer_anomalyxo6mj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wotidupodugi.myartsonline.com/kewor.pdfIn PDF document text
    • https://medlineplus.gov/foodsafety.htmlIn 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_off0000e31f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE31F 5564 bytes
SHA-256: 5aa47e40f87ef75576bde1ae8a403ab0c7bfce34d46410220698d75d2ffd41ad
font_01_sfnt_off0000f604.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF604 10412 bytes
SHA-256: 48c8e46894f0507de120a388e513b06c0af7a148319f9e331695e8e3c8ce45e4