Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ece57bb614c9d82…

MALICIOUS

PDF

81.0 KB Created: 2021-02-11 12:56:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 0fef45961cb0d95fa91540dd4c7d1c76 SHA-1: 1adec8437f638d3abf06cf0169f882db32555e64 SHA-256: 4ece57bb614c9d8258c900d574f7a8dbd88fd99beb18f8323dc5bf0f13872309
262 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://yafferge.ru/aws?utm_term=voot+colors+tv+kannada In PDF document text
    • https://static.s123-cdn-static.com/uploads/4465559/normal_5fce920e451d1.pdfIn PDF document text
    • http://indital.fun/79074337107lssl6.pdfIn PDF document text
    • https://cdn.sqhk.co/nujodusuwud/ghjjjLp/wd_my_cloud_2tb_wdbctl0020hwt.pdfIn PDF document text
    • http://help-verifiedbadgecenter.com/chagrin_river_steelhead_fishing_reportjz33a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503525/normal_5ffd0842535de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479462/normal_5fdee04f461a1.pdfIn PDF document text
    • https://davovexo.weebly.com/uploads/1/3/4/3/134355956/881501.pdfIn PDF document text
    • http://idealsit.space/division_problem_worksheets_3rd_graded7a7g.pdfIn PDF document text
    • https://cdn.sqhk.co/xudekutof/dMShgDW/gujorunarovasitarifevax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471514/normal_60240f825e659.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419629/normal_60096ecf07413.pdfIn PDF document text
    • https://cdn.sqhk.co/joxomawezu/hapicig/outcome_of_an_anti_aircraft_gun_crossword_clue.pdfIn PDF document text
    • http://uuuuull.space/safuvekitepokarafuzx3vu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451744/normal_60019c0aeac22.pdfIn PDF document text
    • http://firstdoctor.xyz/map_my_run_apple_watch_reviewyh0bz.pdfIn PDF document text
    • https://mojogobiwed.weebly.com/uploads/1/3/4/7/134747953/98be6c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413120/normal_5ffcd692112c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453900/normal_5ffa8bff30999.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.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_off0000fecc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFECC 5024 bytes
SHA-256: c6009c5471273db1ca4047e9ff5a8ef97a330afaafa1b8f7f6a4f5f935f1385c
font_01_sfnt_off00010ffa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FFA 11992 bytes
SHA-256: c8fad9a0066112304c7e709b20bafc0cb65cbef4e53df04c2426e972d7734919