Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8e467e3591d647a…

MALICIOUS

PDF

72.4 KB Created: 2021-02-16 17:41:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 5dbd150e2b10d7f5539866cdfb22b955 SHA-1: 053645a394fb3d5a86622d59bce77f0f7212270a SHA-256: b8e467e3591d647a74f4daff8b6f0e3b98925f10c9024cb311cd0c976b9f61ba
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=electron+configuration+worksheet+with+answers+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4467004/normal_601f1c5517f56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467912/normal_600fa4fc95ec8.pdfIn PDF document text
    • https://cdn.sqhk.co/kitijorawul/4wR32hh/mewofawurovizu.pdfIn PDF document text
    • https://cdn.sqhk.co/totimujid/fjbWdhh/regulowikedazox.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468274/normal_5fe90a6011c90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369653/normal_6021f236ae700.pdfIn PDF document text
    • https://bozuluxowefag.weebly.com/uploads/1/3/5/3/135349757/gepurolinumagulexuko.pdfIn PDF document text
    • https://cdn.sqhk.co/figakeves/jcSAghe/best_pocket_knives_with_clip.pdfIn PDF document text
    • https://nitafigiwulizo.weebly.com/uploads/1/3/1/4/131406945/buvilinokidawop.pdfIn PDF document text
    • https://donurufeto.weebly.com/uploads/1/3/4/8/134898164/zisemurunigog_lapuxugige_nuzoka_zixufe.pdfIn PDF document text
    • https://cdn.sqhk.co/munuluxel/rr2ogfM/wiwipovewuxadifedabe.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/wixatax/adam_4000_utility_software_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/15716600437.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/pigabuwebeganepup.pdfIn PDF document text
    • https://s3.amazonaws.com/gulapore/xabukelejuwatezixapigo.pdfIn PDF document text
    • https://s3.amazonaws.com/dufekifaral/65931067927.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/swat_and_zombies_defense_battle_mod_apk.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_off0000de6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE6E 5532 bytes
SHA-256: 46039e53ccada24784a422bd514cf036aa790579f7cea3cf18f065c30de757fb
font_01_sfnt_off0000f154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF154 10156 bytes
SHA-256: adf43d36956db935fba71c53e93d1ad181f69ec22de1a52b45b20cdc70319823