Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fcdc21c49765d2f…

MALICIOUS

PDF

63.3 KB Created: 2021-03-01 07:52:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 717979d31d34b55231b07de2053d2811 SHA-1: 8e49930a6b2d81f2ac7a2178ea62ef470b273a77 SHA-256: 6fcdc21c49765d2fbefa497be2cda1cbb136dd84a1b390aaf1534bf3ddff1664
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://jacksth.ru/wix?keyword=enzymes+worksheet+ks3 PDF link annotation
    • https://cdn.sqhk.co/teposodigar/ihjfHje/snow_white_and_the_huntsman_sequel.pdfIn PDF document text
    • https://cdn.sqhk.co/zugivakizo/bgjTegj/magic_knight_rayearth_anime_lyrics.pdfIn PDF document text
    • https://pofitefe.weebly.com/uploads/1/3/4/6/134617546/071a82.pdfIn PDF document text
    • http://starconflict-game.ru/71169870813p7p0a.pdfIn PDF document text
    • https://cdn.sqhk.co/pimidima/GQhaEhe/atomic_super_lander_demo_download.pdfIn PDF document text
    • https://cdn.sqhk.co/lagusive/CnQjbha/funny_8_ball_questions.pdfIn PDF document text
    • https://cdn.sqhk.co/dovawowo/Xjgvgfc/sports_car_and_bike_hd_wallpapers.pdfIn PDF document text
    • https://cdn.sqhk.co/nupasoxure/8iihhTE/life_is_strange_ps4_trophy_guide_and_roadmap.pdfIn PDF document text
    • https://cdn.sqhk.co/ninilevikod/aqwgdjf/pac_man_ghost_light_kmart.pdfIn PDF document text
    • https://cdn.sqhk.co/xuvetuzaxi/BjfXifp/82642679604.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/tigewibejageju/formic_acid_methanol_synthesis.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/tivora.pdfIn PDF document text
    • https://s3.amazonaws.com/bupaxomu/51767019060.pdfIn PDF document text
    • https://s3.amazonaws.com/mojivikapeti/71862292193.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/doyles_guide_sa.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_off0000bdf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDF3 5112 bytes
SHA-256: 53537eb404c1be3cceaef378963a248bc225e79afbb7922c4b18a7c9c7719f08
font_01_sfnt_off0000cf54.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF54 9784 bytes
SHA-256: 749d861f05afea9fdee29db4bfa452d9ccd30d6474cc1d8be9dca2864b85d554