Malicious PDF — malware analysis report

Static analysis result for SHA-256 fff92f35b5224869…

MALICIOUS

PDF

66.8 KB Created: 2021-02-25 20:50:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 1333aaed0b5f76885058e80b4618d547 SHA-1: 396be7a7677569b5c98bef8bcee82b8dee7697c1 SHA-256: fff92f35b52248698f1bde2dfe68611b03a552b9cc171ad8638110b81d5c309d
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://baarspo.ru/123?utm_term=how+to+rout+demons+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4365576/normal_5fd99574d9989.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/70012470667.pdfIn PDF document text
    • https://cdn.sqhk.co/bamikalagov/hcCiaRs/usa_dating_site_app.pdfIn PDF document text
    • https://cdn.sqhk.co/dojoxuwote/chaX6jd/designer_rose_gold_heart_ring.pdfIn PDF document text
    • https://ripukalogud.weebly.com/uploads/1/3/4/3/134391837/sotorikodirazapagilu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368235/normal_6003b16e3c044.pdfIn PDF document text
    • https://cdn.sqhk.co/lagazowasobo/Thgnnid/risimimosatudim.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491723/normal_5fe93f5a9f7de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504788/normal_6029286f60c80.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/hijdgiZ/super_car_racing_2021_highway_speed_racing_games.pdfIn PDF document text
    • https://cdn.sqhk.co/zidodovare/RhchdAg/flower_garden_layout_planner_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414502/normal_5fc8e0f397b93.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/gcji5Ee/dragon_raja_puppeteer_build.pdfIn PDF document text
    • http://jiwapadenejeza.getenjoyment.net/acurite_rain_gauge_setup.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuvarijes.atwebpages.com/pefeviwiwozavodakajopi.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_off0000c985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC985 4996 bytes
SHA-256: 87d234a4a78f776b09e4ea0f76de7be498c26e304254b40ff609cb7536b808ae
font_01_sfnt_off0000da7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA7F 11084 bytes
SHA-256: c2142bfa72e92ecf1996a4ce426735e6b8ab37e78822b0a457b4d87ff36fc895