Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1f1bd7b3f32a692…

MALICIOUS

PDF

68.8 KB Created: 2021-02-09 03:09:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: dba2fd1247d2050d95b8b6c30998e16c SHA-1: 572d2add424fae47ab6954cdccd1bac5106f5cfa SHA-256: f1f1bd7b3f32a6925ac93127fb375a40e64686c2ac83c6919734300c8b81ae2b
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/wb?keyword=3%20division%20table%20worksheet PDF link annotation
    • https://binikefesomeb.weebly.com/uploads/1/3/5/3/135386190/mewenigiva.pdfIn PDF document text
    • https://vunivejo.weebly.com/uploads/1/3/4/2/134266425/521f24.pdfIn PDF document text
    • https://rowopubogapog.weebly.com/uploads/1/3/4/2/134234702/986610.pdfIn PDF document text
    • https://cdn.sqhk.co/nifijagik/zpVjhzL/lapse_a_forgotten_future_apk_download.pdfIn PDF document text
    • https://guzepebizosi.weebly.com/uploads/1/3/4/8/134880367/5576637.pdfIn PDF document text
    • https://rulipativix.weebly.com/uploads/1/3/1/6/131607363/zetezavubu.pdfIn PDF document text
    • https://talunijepi.weebly.com/uploads/1/3/4/5/134599753/wanaxofevabekak-wedojukuraxaj-kaboxapine-joxuvifezivova.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwewiwudesi/ghifjdU/playstation_5_release_date_gamestop.pdfIn PDF document text
    • https://cdn.sqhk.co/ratosakip/ihjbwCS/diy_paper_crafts_for_adults.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/wakuzidi/catia_v5_full_crack_64_bit.pdfIn PDF document text
    • https://s3.amazonaws.com/nademopor/nukemafejov.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/case_39_2009_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/duzexefemosaxe/nafuso.pdfIn PDF document text
    • https://s3.amazonaws.com/rovikibixu/pibimoji.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/22131085712.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_off0000d16c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD16C 5340 bytes
SHA-256: d3c24cabbd40eef443ec65793bde8c3b1b958d950470714528ceed606dddbd79
font_01_sfnt_off0000e39b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE39B 10156 bytes
SHA-256: 1b5968efcb73c4ae27b5e7fdb0ae8f933a184263ec4011370024b4696ec28f4e