Malicious PDF — malware analysis report

Static analysis result for SHA-256 010ea9824b7b6ab6…

MALICIOUS

PDF

89.8 KB Created: 2021-11-10 13:04:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 0ddc1cb315bd4d844db890b6440b8ff3 SHA-1: 294b128c4e260177360a61a268085050e1dee251 SHA-256: 010ea9824b7b6ab6faaea4378a8902fc98eb6031e439e50145d54192d5a8fc8e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded URLs, many of which are hosted on disposable domains, indicating a link farm designed to obscure the true destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • 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://coretry.ru/uplcv?utm_term=the+new+rulers+of+the+world+pdf PDF link annotation
    • http://bouwbedrijfbouwheer.nl/userfiles/file/65463040664.pdfIn PDF document text
    • http://spineportal.de/files/file/51255543035.pdfIn PDF document text
    • http://blessingsngo.in/userfiles/files/tokegu.pdfIn PDF document text
    • https://finliz.lt/i/File/bukiwigikinenalemiva.pdfIn PDF document text
    • http://elskenecologie.nl/files/49049719634.pdfIn PDF document text
    • http://irpuyesh.com/cache/fck_files/file/fopapomuforutixakadubuf.pdfIn PDF document text
    • https://sikdercollegeofpharmacy.com/scp/ckfinder/uploads/userfiles/files/96577137239.pdfIn PDF document text
    • http://phukhoabacninh.com/images/files/kuzukuxevupagaja.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/17694774453.pdfIn PDF document text
    • https://www.nstoplana.rs/ckfinder/userfiles/files/15262532328.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/lurunubape.pdfIn PDF document text
    • https://marathonblainville.com/userfiles/files/tubiwulanijib.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/d026d1060e594e5e4f51a31bfb962e3d/100402702.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/382206390617f164748e63.pdfIn PDF document text
    • http://kaizenlife.com/ckfinder/userfiles/files/45951117866.pdfIn PDF document text
    • https://thietbigas.toanphatcorp.vn/media/files/popigezemitetipur.pdfIn PDF document text
    • https://e-uchebnici.com/img/file/kugomagalimozepugepubore.pdfIn PDF document text
    • https://philly.drinkpoint.com/uploads/files/fepolikapokasazizenuwiro.pdfIn PDF document text
    • https://jamisonfurnace.ca/userfiles/files/fenobejebi.pdfIn PDF document text
    • http://chulatutoracademy.com/chulatutor/ckfinder/userfiles/files/duvosubarezedodoranila.pdfIn PDF document text
    • https://egokituz.org/files/galeria/files/50190127180.pdfIn PDF document text
    • http://montpellier-businessplan.fr/mbp/upload/images/images/upload/ckfinder/ponenuxozopez.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E8 19680 bytes
SHA-256: 3c7e93dc5e43cb2798cfe5338dc239b13d2a7688861d2a3bbc6e6323cfe19c89
font_01_sfnt_off00012a86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A86 10492 bytes
SHA-256: c92e3d3f0d4b3ebb2b3c1238ef4d47ef52e2b548eca2a1267c1cd4b5e413f567
font_02_sfnt_off00014267.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14267 16540 bytes
SHA-256: 45015263e28dbf00792e0fa83ae0fb9123af5110209f191c00797c49350166ef

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