Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bdc7cc36bbc87c9…

MALICIOUS

PDF

77.6 KB Created: 2021-02-01 15:06:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 5f773539a1eac74ec4aef343014e9f1e SHA-1: 3728382878f16a72bd2cd09caa7e28f36f346476 SHA-256: 3bdc7cc36bbc87c9fbd9819e0f3857086d7f0c35f677da67467317f3eb474ff4
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://yafferge.ru/wb?keyword=chain%20reaction%20bike%20parts In PDF document text
    • https://sopogokatoluj.weebly.com/uploads/1/3/1/0/131071191/zumifefovul-mitadujow-jedixapow.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371514/normal_5fdf508b2f6a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405413/normal_5feb40a93025d.pdfIn PDF document text
    • http://virnet77.ru/mivonojolojaxuzojeybdpu.pdfIn PDF document text
    • https://cdn.sqhk.co/mikevoponage/geicagj/general_hospital_nelle.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4428043/normal_5ff1829ec0e06.pdfIn PDF document text
    • https://cdn.sqhk.co/fesakesovoka/i2gdhec/kowinugoraxuzivigof.pdfIn PDF document text
    • http://xsale.trade/petugor4xg0.pdfIn PDF document text
    • https://bamopinusomuna.weebly.com/uploads/1/3/1/3/131379567/gotarejivujimav.pdfIn PDF document text
    • https://cdn.sqhk.co/rorazelesu/geifhbo/world_war_1_summary_for_students.pdfIn PDF document text
    • http://ing-cliente.com/96366339528ne5lu.pdfIn PDF document text
    • https://bapizemu.weebly.com/uploads/1/3/1/1/131163962/pirofukogivelajaw.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4469634/normal_5fe1f96f837bf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fefomuk.epizy.com/14621118910.pdfIn PDF document text
    • http://xinudekewukipi.rf.gd/84080497331.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_off0000f577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF577 5096 bytes
SHA-256: 6b85db70bc32d9910b95e1780611cf22148b256fefb7f8c69788db3502b036a8
font_01_sfnt_off000106b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106B9 10300 bytes
SHA-256: 9dc4d31071ebb278e67ba750ba8f0c10691640dcd78826ef176163b6b9870bf8