Malicious PDF — malware analysis report

Static analysis result for SHA-256 9df059370b646c40…

MALICIOUS

PDF

74.2 KB Created: 2021-03-07 07:07:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1ecb42a2b6eaa1dbff19ed44779ee06a SHA-1: 9089267d38526f60afd413192470e996cdcda027 SHA-256: 9df059370b646c409ab14a2f4ad8710774df9b6e848ba84f0ca06272ab27f849
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 0.9995

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://botokaw.ru/wix?keyword=potty+racer+unblocked+4 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4485689/normal_5ff4b9c0d659c.pdfIn PDF document text
    • https://cdn.sqhk.co/gusiloxi/gJggojh/lesavavaza.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372073/normal_5fe1bf6c1f07b.pdfIn PDF document text
    • https://cdn.sqhk.co/bevoletef/urhjihh/camera_studio_minecraft_1._15._2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443357/normal_5fd7aa69a243a.pdfIn PDF document text
    • https://jinonapipi.weebly.com/uploads/1/3/4/4/134481743/juzoxuku.pdfIn PDF document text
    • http://kupidarinab.22web.org/tiranudawinipadabimakif.pdfIn PDF document text
    • https://venozosuvizulul.weebly.com/uploads/1/3/0/8/130814909/ea021eff3a65ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456712/normal_602d602fa22f6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369935/normal_5fdb9ca5d2ae4.pdfIn PDF document text
    • https://cdn.sqhk.co/misusulebix/XigghcF/fuduxedemolukuw.pdfIn PDF document text
    • https://cdn.sqhk.co/nuzifixe/ijQ0jiC/zisirewelidavizoxado.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443619/normal_603bd04633182.pdfIn PDF document text
    • http://tupakewufitid.iblogger.org/jomudumejijotusinodo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414498/normal_60280a82ae660.pdfIn PDF document text
    • http://vesixadaw.22web.org/how_efficient_are_ductless_mini_splits.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jotinonikudodi.rf.gd/98780961820.pdfIn PDF document text
    • http://fepoxojosatomu.epizy.com/bekezat.pdfIn PDF document text
    • http://sudurima.rf.gd/vajakumogemazalosoke.pdfIn PDF document text
    • http://napezidemilolez.epizy.com/31935099669.pdfIn PDF document text
    • http://dupenodigilezex.rf.gd/98688089757.pdfIn PDF document text
    • http://kezupomevul.rf.gd/80370426369.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_off0000e6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6D3 5148 bytes
SHA-256: 1656e2a0747d5f4f1502f23339f61d1f7ab33476b1a0ed9cefbf19844b13b256
font_01_sfnt_off0000f86f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF86F 10184 bytes
SHA-256: 7f0e3ccde811fa7311bde48edb0bbd80ec18083066b7a0f601809610d59115aa

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