Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fabef742c251140…

MALICIOUS

PDF

81.3 KB Created: 2021-09-14 12:10:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 57de426cc2a2aef3b3a4926907975d58 SHA-1: 5039e6874c6f0c0874449b1ecea1f21a96603c3d SHA-256: 1fabef742c251140027883d3e1c1b157f3321cbff57d014c3db9af56ab6f6380
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to various domains, many of which appear to be part of a link farm designed to obscure the ultimate destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests a phishing or spamming operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 http://hausdergesundheit.net/userfiles/files/daminogurazufuxizo.pdf In PDF document text
    • http://irk-yoga.ru/upload/files/pojik.pdfIn PDF document text
    • http://tgtech-auto.com/userfiles/file/xaforobuvabamo.pdfIn PDF document text
    • https://aprenda-atdi.com/uploads/files/59520587596.pdfIn PDF document text
    • http://usaoxin.com/userfiles/2021-9/file/vadebipofut.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/pawasebubis.pdfIn PDF document text
    • http://aumnat2car.com/ckfinder/core/connector/php/upload/files/dimutokeviwewotami.pdfIn PDF document text
    • https://vico-inmobiliaria.com/ckfinder/userfiles/files/gibarexokorigaliru.pdfIn PDF document text
    • http://epmresearch.org/userfiles/files/dotipemeno.pdfIn PDF document text
    • http://khojedu.net/userfiles/file/21926366843.pdfIn PDF document text
    • http://kimandyoo.com/userfiles/file/rapupoxa.pdfIn PDF document text
    • https://detectagsafety.com/ckfinder/userfiles/files/15031104159.pdfIn PDF document text
    • http://zekidilektekstil.com/images_upload/files/gijafevakubu.pdfIn PDF document text
    • https://pragatitic.org/ckfinder/userfiles/files/mizup.pdfIn PDF document text
    • http://aroma-es.site/yamituki-n/uploads/files/35854811996.pdfIn PDF document text
    • http://alpes-maritimes.proximeo.com/ckfinder/userfiles/files/ruwunavifavevevozo.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/xivotikumukakilamobos.pdfIn PDF document text
    • http://pzhjintai.com/upload/files/duvasegogata.pdfIn PDF document text
    • http://agriturismoilnoceto.com/userfiles/files/2716842839.pdfIn PDF document text
    • https://mb-classic-service.de/userfiles/file/sipuxaletiji.pdfIn PDF document text
    • https://rajaketiga.com/contents/files/71478234040.pdfIn PDF document text
    • http://aarogyamedico.com/userfiles/file/tojovivomidiluxevoberi.pdfIn PDF document text
    • http://lafiestadelmoto.cz/files/file/rovusonisojawufekodukomoz.pdfIn PDF document text
    • https://emenu.hu/editor_up/guxoma.pdfIn PDF document text
    • https://halkapsikoloji.com/userfiles/file/10959302524.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+to+convert+android+to+iphonePDF link annotation
    • 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

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_off0000dac1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC1 17004 bytes
SHA-256: aca78f0f16a9a011b5ff86e8fb9b799edf889325ffd4e7b818b38be275cf21eb
font_01_sfnt_off000106f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F5 10540 bytes
SHA-256: 551cf45e330ff0b6b2d4e8cd04acdaaf97a0816c8ab4653afd9b13ef6144e61f
font_02_sfnt_off00011ee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11EE9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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