Malicious PDF — malware analysis report

Static analysis result for SHA-256 649fff257afd6f92…

MALICIOUS

PDF

76.8 KB Created: 2021-01-25 07:12:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: b1b812848ac68b298ac6a5a92bf01168 SHA-1: ddf1368e2c59cb0be33f2bc54323517e8427bf8c SHA-256: 649fff257afd6f9246e94e5a31fb80af533f287abde0a7be7053e37391321b0d
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://leonvi.ru/aws?utm_term=security+configuration+management+plan+template PDF link annotation
    • https://cdn.sqhk.co/nusideja/hihjeji/how_to_draw_descendants_three_characters.pdfIn PDF document text
    • https://cdn.sqhk.co/kunutewiwit/j8jbPgf/western_cowboy_gun_fight_game.pdfIn PDF document text
    • https://cdn.sqhk.co/dakagugi/jd4lDia/wedexuvu.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/iijhfqn/epic_games_can_t_enable_2fa.pdfIn PDF document text
    • https://cdn.sqhk.co/wodabakope/g4Jjahf/mezuxogaremizurunevuki.pdfIn PDF document text
    • https://cdn.sqhk.co/vujenibolo/hhgg8jf/final_fantasy_iii_nes_rom_hack.pdfIn PDF document text
    • https://zetaxufonepijak.weebly.com/uploads/1/3/4/3/134353616/2013056.pdfIn PDF document text
    • https://cdn.sqhk.co/tosolizidovi/jcjfgdu/kavujulonubo.pdfIn PDF document text
    • https://cdn.sqhk.co/tazifawixax/dwjbghz/dotigiwur.pdfIn PDF document text
    • https://rabizelen.weebly.com/uploads/1/3/1/4/131453176/6097750.pdfIn PDF document text
    • https://wosubazaroden.weebly.com/uploads/1/3/0/8/130813518/7080299.pdfIn PDF document text
    • https://cdn.sqhk.co/lupobikud/jeijjeE/boxobefa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415950/normal_5ff84b4954e9f.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/kofabube/57899999702.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/66477378099.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_off0000edf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDF5 5360 bytes
SHA-256: 298fb99229566799cff46dada9603a113401d4a3c4dafe594ee4436af234878c
font_01_sfnt_off0001002f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1002F 11096 bytes
SHA-256: 06ba90634545b778113c7584f099985ec5c40fe043da39f7ed15ecef93b1ef47