Malicious PDF — malware analysis report

Static analysis result for SHA-256 b927a9b9fd5254b8…

MALICIOUS

PDF

68.4 KB Created: 2021-01-18 16:51:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 7cc34c032d0af96c7a29a58f688faec6 SHA-1: 6fca1b20bb55b7e967851d662d00dfc12e7afb55 SHA-256: b927a9b9fd5254b808ad51f362eafb5b80c8f91f0b91893fbb08f94766939a06
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=mastermind%20movie%20real%20characters In PDF document text
    • https://cdn.sqhk.co/dizoketa/gjwiehg/groovepad_music_beat_maker_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pepigovagove/ZsJ5YOd/mcdonald_s_phone_number_in_jacksonville_florida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367278/normal_5fbf1dcf022ad.pdfIn PDF document text
    • https://cdn.sqhk.co/fosojatesog/pLOLhf8/lefofesadi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384320/normal_5fdbdfc464a79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390637/normal_5fd1226cab763.pdfIn PDF document text
    • https://cdn.sqhk.co/dokederajo/StDENU5/vatevufixi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383170/normal_5ff182f5c3f91.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446491/normal_5fc9ba7bc0586.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://litopuputorer.rf.gd/28993636668.pdfIn PDF document text
    • http://jeputujakajaj.epizy.com/67623595796.pdfIn PDF document text
    • http://wajalapivibobi.epizy.com/weragirefutibelasabe.pdfIn PDF document text
    • http://fukasutatota.rf.gd/56114516608.pdfIn PDF document text
    • http://peworesafasar.epizy.com/jejup.pdfIn PDF document text
    • http://nilipinuz.rf.gd/cbse_class_11_economics_syllabus.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_off0000cdd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDD3 5244 bytes
SHA-256: c8cd3986b7b19db9f508613352baaf984b0025d533ad85b5bc60e0457d7126cc
font_01_sfnt_off0000df8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8C 11004 bytes
SHA-256: 75051b0d29933bdef8c03452a1ebf8c8ec96d88aad4cf0f05ea4ac70982a42b9