Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cf1e8be8375349f…

MALICIOUS

PDF

73.6 KB Created: 2021-02-19 12:39:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 44ae434a57b72208a40eaa272ec3e598 SHA-1: 707a8751ab851a4aae841697720c4c12fc40369f SHA-256: 7cf1e8be8375349f9d93c5f31b7c667dc71c611a1033b22635630e768c133772
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/aws?utm_term=2000+chevrolet+silverado+trailer+wiring+diagram In PDF document text
    • https://cdn.sqhk.co/vexedobasof/chcbiaN/mewoninusobebulolelu.pdfIn PDF document text
    • https://cdn.sqhk.co/genopeno/iagjq5v/colonizer_organisms_in_urine_culture.pdfIn PDF document text
    • https://cdn.sqhk.co/tavedikovo/jjajaij/pekomugubotat.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472776/normal_5ff6568917918.pdfIn PDF document text
    • http://notudokebifapaf.22web.org/buvawunomidetotos.pdfIn PDF document text
    • https://cdn.sqhk.co/poronujefino/iMiegg2/3687531861.pdfIn PDF document text
    • https://cdn.sqhk.co/rusefijow/hegeid6/history_of_african_american_hair_products_for_toddlers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490244/normal_5fe2f5f519f3c.pdfIn PDF document text
    • https://cdn.sqhk.co/pujixefan/eiageji/63381587189.pdfIn PDF document text
    • http://prizinsta24.online/bofubakupodinetikezibatoqnz0l.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/fzijKFU/brilliant_distinctions_gift_card_check_balance.pdfIn PDF document text
    • https://cdn.sqhk.co/mogezunir/iidijUK/63321393694.pdfIn PDF document text
    • http://1eyvgo.xyz/rectangular_prism_templaterpc8m.pdfIn PDF document text
    • https://cdn.sqhk.co/lobinazema/oAr0sie/zevusunixixixuvasa.pdfIn PDF document text
    • http://winfreeiphone.xyz/chal_chaiya_chaiya_song_lyricsqkx2y.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e37e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE37E 5684 bytes
SHA-256: 25f19db581edfadcd37a3894b4e2ae950814087ca16eeb51394151d30bac5e1d
font_01_sfnt_off0000f6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BD 10080 bytes
SHA-256: 3638f43ca502895d46305909ab89094ebd0393060f1df9197686fec4a7996f74