Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ad40faba21f425e…

MALICIOUS

PDF

67.4 KB Created: 2021-02-25 22:22:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 64658917dc520769b82b0b2e60265f94 SHA-1: e44b59fbf54a8654405fb85cde03bdee8e306b38 SHA-256: 6ad40faba21f425eacdd1a9a461167665e8b3f3f99db7891485025b1be387bd9
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/award?keyword=be+going+to+exercises+pdf+2+eso PDF link annotation
    • https://cdn.sqhk.co/womawuxinuge/cLFjSl5/1_clue_words_and_syllables_answers.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499979/normal_5fd7ae0b6961e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402297/normal_6037361f61d22.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/how_to_turn_off_airplane_mode_on_doro_7050.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378406/normal_600b3564e51b9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365655/normal_600fccd6e8f4d.pdfIn PDF document text
    • https://zokanebawabor.weebly.com/uploads/1/3/1/4/131438448/14931e.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/sevoga/pimaripuropobagetoluw.pdfIn PDF document text
    • https://s3.amazonaws.com/jevelel/genu_valgum_deformity_icd_10.pdfIn PDF document text
    • https://s3.amazonaws.com/mogedozara/birla_sun_life_pure_value_fund_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/bulujono/vizio_code_for_universal_remote_ge.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/meri_bamani_video_song_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/legipalofi/guidepost_magazine_prayer_requests.pdfIn PDF document text
    • https://s3.amazonaws.com/fadedosi/6042216229.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/vudareliberugi.pdfIn PDF document text
    • http://liraperuwuw.atwebpages.com/adele_-_someone_like_you_live_at_royal_albert_hall.pdfIn PDF document text
    • https://s3.amazonaws.com/nuruvapozixix/34071918042.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_off0000ca42.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA42 5328 bytes
SHA-256: 31516ff0814279bb94edb016117cf04b925ef3e5b11278f9c16ef55e31328fae
font_01_sfnt_off0000dc8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC8A 10832 bytes
SHA-256: 608a7f0c8093ab2ce1c817215b655e30f7d0f4ff852ffd16fd381ce32c57b487