Malicious PDF — malware analysis report

Static analysis result for SHA-256 67c8c0ef21eeca21…

MALICIOUS

PDF

66.0 KB Created: 2021-02-14 22:54:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: aabd69b864e3ae99f2448ccc80f388e2 SHA-1: 2df62223d22a00f159e3c15751e6b253856ec809 SHA-256: 67c8c0ef21eeca215709eeaf667e5447ca527aab5f215a2648c1f2cb63744cfc
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/wix?keyword=artificial+selection+worksheet PDF link annotation
    • https://wetenonuvodipu.weebly.com/uploads/1/3/5/3/135321676/sinupuwewepe.pdfIn PDF document text
    • https://cdn.sqhk.co/zogameva/b0lHhhi/26369155916.pdfIn PDF document text
    • https://cdn.sqhk.co/ninubisidire/9geUibO/lenibesuvizutidik.pdfIn PDF document text
    • https://cdn.sqhk.co/sepunaro/C13iaBn/easy_homemade_face_mask_for_acne_prone_skin.pdfIn PDF document text
    • https://cdn.sqhk.co/borefigux/e7icgcw/kupegodavawomalemu.pdfIn PDF document text
    • https://felipivi.weebly.com/uploads/1/3/1/8/131856333/didubudes.pdfIn PDF document text
    • https://cdn.sqhk.co/xefijumu/jehcheB/pezukowi.pdfIn PDF document text
    • https://cdn.sqhk.co/zaviresodew/drVjfhe/online_zombie_hack_games.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/tinezedu/bmat_section_3_2018_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/furunumaroxun/best_android_racing_games_apk.pdfIn PDF document text
    • http://watimesuw.rf.gd/guided_reading_activity_8-_1_world_geography.pdfIn PDF document text
    • https://s3.amazonaws.com/mudurixo/81665650424.pdfIn PDF document text
    • http://rafubapon.epizy.com/74677404253.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/22502670835.pdfIn PDF document text
    • http://sagajifigekar.rf.gd/44910600924.pdfIn PDF document text
    • http://vejebuta.rf.gd/75230573501.pdfIn PDF document text
    • http://sikofus.epizy.com/78416450809.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/indian_shirt_size_guide.pdfIn PDF document text
    • http://puvodiga.rf.gd/ruderebotinojexo.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_off0000c7bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7BD 5112 bytes
SHA-256: 1c99c9adc26f2b8637144ac096013ffc581e29872efd4b334fe427ab44c42a24
font_01_sfnt_off0000d930.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD930 9844 bytes
SHA-256: 9c787dab8efc421b1f53f3ca35824857edb11f5ce41e2213a1675e5de3ce201c

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