Malicious PDF — malware analysis report

Static analysis result for SHA-256 390091975f196c64…

MALICIOUS

PDF

87.9 KB Created: 2021-04-25 15:01:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 655f559c9f4ddcee74bf6acab603caeb SHA-1: 5e1c5937a3c8dbbba3ba211ce086528c1198fdbb SHA-256: 390091975f196c6483bbd3894140ca133829b7ce933cb4072c1b5e5b831c1486
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://resalured.ru/strik?utm_term=nespresso+aeroccino+milk+frother+troubleshooting PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4479435/normal_6019f95299acd.pdfIn PDF document text
    • http://muparizuxufuxud.22web.org/o_reilly_python_pocket_reference.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369638/normal_603401e19bfc9.pdfIn PDF document text
    • http://rakivabe.sportsontheweb.net/artificial_intelligence_and_neural_networks.pdfIn PDF document text
    • https://cdn.sqhk.co/jakatote/cghgcih/2020_porsche_911_turbo_s_drag_race.pdfIn PDF document text
    • https://cdn.sqhk.co/wapuvalapowa/ZLVuege/65392727974.pdfIn PDF document text
    • http://kovafuwir.getenjoyment.net/total_coliform_bacteria.pdfIn PDF document text
    • https://jinuwipalo.weebly.com/uploads/1/3/5/3/135332432/laravujaxotozesoxon.pdfIn PDF document text
    • https://nodeseverew.weebly.com/uploads/1/3/5/3/135323512/tujamo.pdfIn PDF document text
    • https://poxawakepuk.weebly.com/uploads/1/3/1/6/131606289/298315.pdfIn PDF document text
    • https://cdn.sqhk.co/vumuwuxa/PjaKlaQ/siwawozatalag.pdfIn PDF document text
    • http://fozasuwukoroba.iblogger.org/functional_literacy_test.pdfIn PDF document text
    • https://duzareledibasa.weebly.com/uploads/1/3/4/8/134890493/5220503.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366009/normal_601420ceb3388.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403676/normal_6042004ed7f6e.pdfIn PDF document text
    • https://sidanarud.weebly.com/uploads/1/3/0/9/130969336/mowibivabidibavexe.pdfIn PDF document text
    • https://cdn.sqhk.co/wubunepan/Ljhvjaa/60863463808.pdfIn PDF document text
    • http://ramavevukomiw.iblogger.org/auto_formation_windev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vifowas.epizy.com/buffer_stock_scheme.pdfIn PDF document text
    • http://bememikat.onlinewebshop.net/gce_o_level_biology_notes.pdfIn PDF document text
    • http://nudagimanefej.atwebpages.com/26017096100.pdfIn PDF document text
    • http://feputuwi.epizy.com/33653305499.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010c4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C4A 3016 bytes
SHA-256: 6b1886100909a5777bb30fc7b7be00bba8ed48ad5f5b392b7a0cb4783a0739ac
font_01_sfnt_off00011704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11704 5604 bytes
SHA-256: 80477437bbc72d60b28ed920162ff5ee69602f9c63b79a9b8276451790c157cb
font_02_sfnt_off000129ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129ED 11772 bytes
SHA-256: ffb50e6829307e31743ccce0ea37d1d1529f4362171eccf98dc1bcef0fa2332f

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