Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bfb142877d510ac…

MALICIOUS

PDF

97.1 KB Created: 2021-02-18 11:14:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0d50f73aed09e2b1d582d1e01498092a SHA-1: a4164e34e45f5a902d2fb144ae796640fea99298 SHA-256: 1bfb142877d510acc1a3da9c909659844f06154d99287d17cebee2c25824a7ec
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded links, many of which point to known malicious redirector infrastructure or disposable hosting. The heuristic firings indicate the PDF is designed as a link farm and contains malicious redirector links, strongly suggesting a phishing or scam attempt. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful sites.

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.
  • 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/wix?keyword=pursuit+of+happyness+movie+questions+and+answers In PDF document text
    • https://cdn.sqhk.co/towinomer/giawajh/48233568213.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389586/normal_600e143e5e8a6.pdfIn PDF document text
    • http://espaceclient-cmb.com/gorikiwefurivk5uhx.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401972/normal_602b73b56fabd.pdfIn PDF document text
    • https://cdn.sqhk.co/rorajakura/d7Gggwh/34820922173.pdfIn PDF document text
    • http://moreprodukti.com/pipifepetutavisufuluxepejt7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469103/normal_600f1d929df5a.pdfIn PDF document text
    • https://cdn.sqhk.co/bemoranoz/hvFuict/89509855061.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443619/normal_60040ff90f639.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384028/normal_6013bbf9ae050.pdfIn PDF document text
    • http://avit0.pro/39044011899my3zd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498376/normal_5fe2305b822c1.pdfIn PDF document text
    • https://cdn.sqhk.co/zopimoforaja/dcdtY9Q/c64._emu_apk_1._5._37.pdfIn PDF document text
    • https://cdn.sqhk.co/rubekafux/hbgigjy/hydraulic_wire_rope_cutting_machine.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416502/normal_6027244be2241.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388427/normal_60139fd163227.pdfIn PDF document text
    • http://educationonline.website/bowflex_dumbbell_workouto3oh9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393752/normal_5fda893b64422.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447626/normal_5ff260013524f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368996/normal_6010e2734d957.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/roxawo/answers_of_applications_of_trigonometry.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_off00013e39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E39 5632 bytes
SHA-256: 2a33834f683a4783cdb0cc4037c06315c9da1367228b277c5adc4673732109e1
font_01_sfnt_off00015150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15150 10856 bytes
SHA-256: eccd585fa25368fe9735d8d023fe6850994876214bd1b3bab9b95888cd4fc8f9

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