Malicious PDF — malware analysis report

Static analysis result for SHA-256 eec04858c71fc555…

MALICIOUS

PDF

66.7 KB Created: 2021-02-25 01:54:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: ea87b6c7f4a65c639ada481cc4853e22 SHA-1: fa3a56f1dc9a056e9b4af79b62739f19a12ccd15 SHA-256: eec04858c71fc555eadeee02dd5d3226269d2f386a775b60315dd5c0450a5af6
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://maypoin.ru/wix?keyword=ashcroft+and+mermin+solutions+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426558/normal_6029f1f24adfd.pdfIn PDF document text
    • https://cdn.sqhk.co/remigalakefo/icgjEN2/knife_sharpener_electric_best.pdfIn PDF document text
    • https://vigijamavo.weebly.com/uploads/1/3/0/9/130968937/9674710.pdfIn PDF document text
    • https://cdn.sqhk.co/xeloxilava/ichghaz/crossfire_hurricane_rolling_stones_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/bamosabubesi/zYl1ig2/formula_f1_racing_game_for_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470699/normal_6026bed5239d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427091/normal_6028b7f24a948.pdfIn PDF document text
    • https://vilamewu.weebly.com/uploads/1/3/0/7/130775649/ec9954b991d2.pdfIn PDF document text
    • https://bifukedupojuxi.weebly.com/uploads/1/3/4/4/134498794/tavogotu-sepatudenurowas.pdfIn PDF document text
    • https://zoforute.weebly.com/uploads/1/3/4/3/134352948/vasuweg.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/zuwimadaneb/formalism_literary_analysis.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/sokeragamejeni.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/jaipuri_print_bed_sheets_online.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/chiku_chiku_bandini_ro_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jefazaxal/apple_earnings_report_q4_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/mort_subite_du_sportif.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/zijopinifakatuxijiretino.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/xikatudof.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/what_fish_eat_daphnia.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_off0000c83c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC83C 5384 bytes
SHA-256: 1e3067361744361618dbb10362ce53aafade2309f6bed821057bc0cdd77ff75b
font_01_sfnt_off0000da63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA63 9844 bytes
SHA-256: 919800caf20c5191ab57ae4de37b4dbf53582a432023a142c96a4bda0a633062