Malicious PDF — malware analysis report

Static analysis result for SHA-256 351d859df281a15c…

MALICIOUS

PDF

73.1 KB Created: 2021-03-04 23:29:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 485716bde1a0f5bf1fb51181784aa028 SHA-1: 24f1c310a5b4a5b942ff215b53c4d9cc96a35351 SHA-256: 351d859df281a15ca7078cf17234f4b0efb8da2a45ea3ad37d19e129b4887b3b
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/award?keyword=past+participle+verb+list+regular PDF link annotation
    • http://sdek-24.cc/43275966667ymmxr.pdfIn PDF document text
    • http://ch-data-2a8fv9s.pw/4962630964qd8gj.pdfIn PDF document text
    • http://udilische.club/turning_back_the_clock_umberto_ecomf5nt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381980/normal_600fa597bb19e.pdfIn PDF document text
    • http://tublitalia.space/spiderman_games_for_android_phonesqto2a.pdfIn PDF document text
    • http://awpmode.com/47394323498hs7jv.pdfIn PDF document text
    • http://familyit.info/knife_stab_sound_effect_downloadpaa24.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383132/normal_5ff7c4f8514fc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372721/normal_5fc9f7b0a9542.pdfIn PDF document text
    • http://indir-kazan.com/fiwufe7wz67.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/lusabifef/48102212915.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbf806ff-0db3-4c65-8f45-0dcde4f72d20/mirroring_interview_questions_and_answers_in_sql_server.pdfIn PDF document text
    • https://s3.amazonaws.com/zarusegibitumet/46598365514.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4fa29080-de48-4917-877d-286fef91d600/40344896956.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/dilekibinen.pdfIn PDF document text
    • https://s3.amazonaws.com/wizitifowubux/95841854368.pdfIn PDF document text
    • https://s3.amazonaws.com/fasomusogapovi/skype_for_android_old_version.pdfIn PDF document text
    • https://s3.amazonaws.com/remufuzu/pakistan_visa_application_form_for_bangladeshi.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_off0000e1f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1F1 5300 bytes
SHA-256: 5a0a0c7cf154cfa32493f15d571d8f34a530ded27882230ac9ea364c904ab778
font_01_sfnt_off0000f40e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF40E 10276 bytes
SHA-256: 77a6aebd22981448a9a858804768756e79b1b335d216279e876d89fd8caaade9