Malicious PDF — malware analysis report

Static analysis result for SHA-256 96ca32093366a805…

MALICIOUS

PDF

68.9 KB Created: 2021-09-25 02:35:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c8fe203f59c1a7637d36c50fcde6399e SHA-1: 3b46e7e5eb286d7864a0eb7dd397957b3ca1bf50 SHA-256: 96ca32093366a8053ad1dd72047e90dd1620c952f2e884c8d97fb93334b3aed8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm pointing to multiple compromised WordPress sites, a common tactic for distributing malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially harmful content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/161313af70289e---nisopu.pdf In PDF document text
    • http://kdbelektrotechniek.nl/uploads/file/xibawedopud.pdfIn PDF document text
    • http://jlssj.com/qianzi/upfile/case_editor/file/51718631355.pdfIn PDF document text
    • http://sowa-architekci.pl/userfiles/files/85183206551.pdfIn PDF document text
    • https://isosklo.cz/uploads/52855307609.pdfIn PDF document text
    • https://pushtypathshala.com/demo/aims/files/images/files/fozavirumusobikaj.pdfIn PDF document text
    • http://simp-q.ru/userfiles/file/sokezifuzizu.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/248107705f6990e45400106c2ca8b567/pukujajapi.pdfIn PDF document text
    • http://poney-club-romilly-aigre28.fr/userfiles/file/34473129215.pdfIn PDF document text
    • https://censcakmu.org/board/file/files/zebowezawige.pdfIn PDF document text
    • http://studioarchperissinotto.eu/userfiles/files/difeteramewoz.pdfIn PDF document text
    • https://wecareprogram.org/images/file/dujivemowowid.pdfIn PDF document text
    • http://studiosiciliani.eu/userfiles/files/zisuzolow.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/tejumisemoxipilasiwusajad.pdfIn PDF document text
    • http://hainfelderteich.at/xotamewa.pdfIn PDF document text
    • http://atenngo.com/admin/sites/site/documents/86379092484.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210923010845368.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d60411ad53---kariwubivanul.pdfIn PDF document text
    • http://qhchemicalsfeed.com/upload/files/54292839892.pdfIn PDF document text
    • http://woodlandhills.ilovepokebar.com/uploads/files/gikavafux.pdfIn PDF document text
    • http://abwingsjanaf.com/uploads/files/26918075413.pdfIn PDF document text
    • https://junona.manyel.website/images/uploads/medium/genufalu.pdfIn PDF document text
    • https://nieruchomosciturystyczne.eu/files/file/62479584654.pdfIn PDF document text
    • http://tksvolga.ru/userfiles/file/latowinofojo.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/ea9ce02b6962afbc5549256821377b13/desubijeverefike.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=what+is+call+app+on+androidPDF 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_off0000b0b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0B2 15276 bytes
SHA-256: af02ca547cc0bcdecd13ef69a428c58511b31e54b940d9efd11081e70d6489eb
font_01_sfnt_off0000d69e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD69E 10472 bytes
SHA-256: 93d1b95417d04b7b888f2e4494421653b601aac91060f3ba6cd723bc8e69e383
font_02_sfnt_off0000ee5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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