Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc74f1c2450300b7…

MALICIOUS

PDF

74.1 KB Created: 2021-02-19 21:42:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 9bd9e8ae377326c3e2a5f7e9b5c408bf SHA-1: ec01ff186797442766c8da58f1967419d2220d41 SHA-256: bc74f1c2450300b7969b10144000d21152740e090d10688f8683db507b328711
184 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
  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/wb?keyword=cisco%20ip%20phone%207941%20user%20manual%20pdf In PDF document text
    • http://bluebadgeform.com/99860115053oe297.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/jVgjvia/78570441375.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479439/normal_60116e93edabd.pdfIn PDF document text
    • https://cdn.sqhk.co/fumodolanes/nicjdDq/ping_pong_table_walmart_espn.pdfIn PDF document text
    • https://cdn.sqhk.co/vixuzemabad/gjxPbig/lol_tft_zed_build.pdfIn PDF document text
    • http://winoorama.space/30860367131m4766.pdfIn PDF document text
    • https://cdn.sqhk.co/wepunajexiju/ih3jdib/big_blue_marble_academy_greenville_sc.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/dowadotiju/spoken_english_video_hd.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/suzemumutufuritit.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/algebra_factoring_problems_with_answers.pdfIn PDF document text
    • http://paritoxo.rf.gd/43745819613.pdfIn PDF document text
    • http://zenejifawulo.epizy.com/payment_in_international_trade.pdfIn PDF document text
    • http://baxojusijopigas.rf.gd/2684242680.pdfIn PDF document text
    • https://s3.amazonaws.com/remavuj/tefanumalit.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/rubezovaxovepos.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_off0000da80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA80 5676 bytes
SHA-256: 29af8b96f6eb32febe36a0bb385a964fc4a85e538f657c69e16aa24f2fe8e067
font_01_sfnt_off0000edb7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDB7 14520 bytes
SHA-256: 15e8bdd7862dbf8ab87f1dca633485fd2f5062e5ebdbff20f53a4da098f2bea8