Malicious PDF — malware analysis report

Static analysis result for SHA-256 78b92e29e1a0c6ff…

MALICIOUS

PDF

77.7 KB Created: 2021-04-28 16:13:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f30209218c95a1431bfa6a97975da301 SHA-1: c415435160cec851c5f51c9fb9d98f6e1df74b59 SHA-256: 78b92e29e1a0c6ffbe8bac773560ac40cec4702aa26d295b11980ab114e49149
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document body, though heavily obfuscated, contains text related to car performance, likely a lure to disguise the malicious intent. The embedded URLs, such as 'https://xezojetit.ru/strik?utm_term=maserati+quattroporte+0-60+time', are indicative of a phishing campaign aiming to redirect users to potentially harmful content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further suggests a malicious intent to use numerous disposable domains for hosting malicious links.

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://xezojetit.ru/strik?utm_term=maserati+quattroporte+0-60+time PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4464311/normal_5fe36048dae88.pdfIn PDF document text
    • https://cdn.sqhk.co/wujozuzewed/aYcXVo4/xebubipixob.pdfIn PDF document text
    • http://lozuzaragujeb.mypressonline.com/60143063806.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458854/normal_601b43a09ea27.pdfIn PDF document text
    • http://pejazadajenatew.getenjoyment.net/30698561047.pdfIn PDF document text
    • https://cdn.sqhk.co/wugeguxu/axVicgg/35726431154.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455881/normal_601eaa4dcfc7f.pdfIn PDF document text
    • http://zoxenejuwu.iblogger.org/beginner_gym_program.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370053/normal_5ff78ead49619.pdfIn PDF document text
    • https://cdn.sqhk.co/pininipata/AgdJgi2/darotapugejuwejapi.pdfIn PDF document text
    • http://xesepoxobij.22web.org/24398297380.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408596/normal_603c6b62d84bd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_600e122f3ed86.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419645/normal_5fc7c91e8cd01.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://76c9fb28-c10e-4950-85be-37de24a2ede8.filesusr.com/ugd/fa32a6_920624b7612148e997154e813ce75ed3.pdf?index=trueIn PDF document text
    • http://jasumubi.rf.gd/vavomaworabovaju.pdfIn PDF document text
    • https://6f672a44-e16c-4921-a0f1-e3781c0647c5.filesusr.com/ugd/bda22a_c7d1c8ef37644d10b4de3efaa26cad6a.pdf?index=trueIn PDF document text
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_2cd7c82d45bd4745a79229e7e6334f2e.pdf?index=trueIn PDF document text
    • https://f770b3d7-c897-40e0-9323-5ad0abd91552.filesusr.com/ugd/1fa6dd_077af27c3bf944abb0efe645c1df8116.pdf?index=trueIn 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_off0000f06e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06E 5392 bytes
SHA-256: 0618cec42d9ea6ce314933477d235fe9345318495daf5e23c22a52ef51ad2881
font_01_sfnt_off000102c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C4 11308 bytes
SHA-256: 26dd205eb4ea727fa9c9b89cd6e046e819dd5ab4a0cef5426a48f7451eee34bf

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