Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a6240916386d35a…

MALICIOUS

PDF

74.0 KB Created: 2021-02-13 11:19:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 04f531b350212b0d0db4246354924b86 SHA-1: 56809c7fecae4baca5dde13fea0cb0e4246d94d0 SHA-256: 0a6240916386d35a8aa8123b135826e882d3d1a7f95ea4449716a8bc614050f8
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/wb?keyword=undead%20mage%20leveling%20guide%20classic%20wow PDF link annotation
    • https://buxomajuse.weebly.com/uploads/1/3/4/5/134588570/3b5bafeffb12.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454306/normal_60030bae490e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465015/normal_5ff384a3dc70b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368235/normal_5feea63243040.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421474/normal_5fe74b65742f0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494433/normal_6005c26ff280a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410414/normal_5fe0e64221404.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419410/normal_5fe00b9ee734b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492278/normal_5fd649169b68f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412899/normal_5fd3388c17e32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453100/normal_601912c0bef4c.pdfIn PDF document text
    • http://masexuzijavigap.iblogger.org/computer_certificate_template_psd.pdfIn PDF document text
    • https://mulodetudujidof.weebly.com/uploads/1/3/5/3/135325190/244845.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388608/normal_600319d442efd.pdfIn PDF document text
    • https://xejuxomezul.weebly.com/uploads/1/3/1/6/131637030/gizikilivuku.pdfIn PDF document text
    • https://navemozozaju.weebly.com/uploads/1/3/1/1/131164567/bikepeb_jajoweraje.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nitusul.rf.gd/browser_javascript_engine_performance_comparison.pdfIn PDF document text
    • http://japorununatoj.epizy.com/67999858243.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_off0000e2f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F7 5304 bytes
SHA-256: 41e4f1bda474710e0801b3509646057f5c656b28558279185854fad3b18b25ae
font_01_sfnt_off0000f50b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50B 11172 bytes
SHA-256: 5a545ef4f199a02615e46338e637d6b8ba7d063aa064961e86fa10c04a7ec82a

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