Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e1a893eef2534b…

MALICIOUS

PDF

79.6 KB Created: 2021-09-29 13:46:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 74d91675ec68e0a9a9605038eadf630a SHA-1: 593122d579f14825b13db2c2ca4784a40f915b13 SHA-256: f2e1a893eef2534b0ba2ed76e79d885d16b61ec82fe49ed4eedaeef8fb2feb9d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of numerous external URIs, including a link farm on disposable hosting, suggests an attempt to redirect users to malicious sites. Although no scripts were explicitly extracted, the PDF structure and heuristic firings point towards a phishing or malware distribution scheme, likely leveraging embedded links to achieve its objective.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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://hitecds.com/userfiles/file/zamizogugisozasiso.pdf In PDF document text
    • https://cli-kh.com/uploads/files/202109130027301241.pdfIn PDF document text
    • http://www.toptehnik.si/images/pewos.pdfIn PDF document text
    • http://www.farnostbobrova.cz/ckfinder/files/liriraloze.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/jazifelowiliviguvirojom.pdfIn PDF document text
    • http://vwtint.com/userData/board/file/gaxepomawujeg.pdfIn PDF document text
    • http://cpgny.com/userfiles/files/gugadukobukiluda.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/lupawaxigipinur.pdfIn PDF document text
    • http://lahma.pl/_u/userfiles/file/jodafofabipofazumaput.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/e27386da5a5d0496a31c93c2a2c6ff54/67214494389.pdfIn PDF document text
    • https://calprin.com/ckfinder/userfiles/files/folikerobixisubemanixig.pdfIn PDF document text
    • http://leadershipcareer.kr/fckeditor/_upload/file/tuvolepexuneso.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16153b70e7f1db---65383960099.pdfIn PDF document text
    • http://taemyung.com/data/upload/file/12485478881.pdfIn PDF document text
    • http://screen.by/images/file/33619858944.pdfIn PDF document text
    • http://handsonmontessoripk.com/userfiles/files/64920030124.pdfIn PDF document text
    • http://marcobernini.it/userfiles/files/wolumerusopaninefudi.pdfIn PDF document text
    • http://www.louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/tuginurudimuwudi.pdfIn PDF document text
    • http://sushrutproctology.org/ckfinder/userfiles/files/36196005086.pdfIn PDF document text
    • http://cariboohose.com/userfiles/file/wotovotiwimefox.pdfIn PDF document text
    • http://inoxbienhoa.com/upload/files/bakurodejivonakuwax.pdfIn PDF document text
    • https://rt-totaalafbouw.nl/userfiles/file/31620461680.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=zelda+breath+of+the+wild+update+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6D2 19616 bytes
SHA-256: 08a53a4d52f82dab612250d96668dde5618c12959ddbdd9942f02c7b90fef5a3
font_01_sfnt_off0000ea12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA12 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010223.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10223 16188 bytes
SHA-256: 800554d3d6320da9c8ab21a3ad3d270f40e7a92360d7538c059d647d952d1d34
font_03_sfnt_off000117da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117DA 10716 bytes
SHA-256: 3d088e0e8087e19dae56b6dc8d869f8bf95bb75772c3fc0f2d8e82828381e550

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