Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ecd32334794d796…

MALICIOUS

PDF

90.3 KB Created: 2021-10-07 10:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 137051918f524dc82dd0dd421b0bd257 SHA-1: 183f707559a8ddfc7f8ec5d3a0e07f852c998f1d SHA-256: 9ecd32334794d7963f30b93637e0e578d1c6743b4072b2f909cfb44388f05239
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML and ClamAV as malicious, indicating a phishing or trojan threat. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous extracted URLs suggest the document is part of a link farm designed to redirect users to potentially malicious content. No scripts were extracted, but the presence of external links points to a likely attempt to download further payloads or phish credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://sparkpro.lv/content/file/kivitowukinuduxixularijub.pdf In PDF document text
    • http://jeanthompson.nl/ckfinder/userfiles/files/13317200891.pdfIn PDF document text
    • https://magnanerie-cazilhac.com/userfiles/file/38294502888.pdfIn PDF document text
    • https://www.pactforfamilies.org/ckfinder/userfiles/files/fafiloputiwidu.pdfIn PDF document text
    • http://castudio.eu/userfiles/files/didibuxowigafaxizulotesi.pdfIn PDF document text
    • https://charterboatdeliverance.com/uploads/files/76057342875.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/u6cnkc9175sm78p19022fdc0q2/73671653110.pdfIn PDF document text
    • http://arabic.cz/ckfinder/userfiles/files/belezajivufokimobusiku.pdfIn PDF document text
    • http://gonzagafood.com/userfiles/files/radimosujuvofamamanavibu.pdfIn PDF document text
    • https://jnvhardoi.org/ckfinder/userfiles/files/rexabedokakuzawanetisuk.pdfIn PDF document text
    • https://dondepodemosir.com/userfiles/file/73682651107.pdfIn PDF document text
    • https://hinodanang.com/uploads/image/files/putonetumivanenixudu.pdfIn PDF document text
    • http://kimwendelldesign.com/ckfinder/userfiles/files/vurerefol.pdfIn PDF document text
    • http://escalierdurire.fr/ckfinder/userfiles/files/87622076698.pdfIn PDF document text
    • http://kstarsmall.net/userfiles/file///29822277043.pdfIn PDF document text
    • http://euskararenginkana.eus/files/galeria/files/30044005942.pdfIn PDF document text
    • http://purepassion.pl/userfiles/file/49689842453.pdfIn PDF document text
    • https://ngaa.org.au/application/third_party/ckfinder/userfiles/files/werimilotomovoxidubazo.pdfIn PDF document text
    • http://neteyes.eu/editor_up/2395739305.pdfIn PDF document text
    • https://habibitoursegypt.com/ckfinder/userfiles/files/71519747425.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1615704d86e737---18544980946.pdfIn PDF document text
    • http://elitaliaweb.it/upload/file/2597807339.pdfIn PDF document text
    • http://dasbluemchen.com/kifojikalevepanaloger.pdfIn PDF document text
    • https://dogathermalhotel.com/resimler/files/miwejuludixugosapi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=salmond+on+the+law+of+tortsPDF 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f675.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF675 19996 bytes
SHA-256: 533439734e79302341071f40928aa4ae04990bc0ea1436e202e4960179bb821f
font_01_sfnt_off00012ae3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000142fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142FA 10688 bytes
SHA-256: c5c06c1a6d7ffce2acf1db3ca7d8bdbbede25c45c3fb60990cf9f3ba18232dea

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