Malicious PDF — malware analysis report

Static analysis result for SHA-256 32969d1a11b684ee…

MALICIOUS

PDF

80.7 KB Created: 2021-09-04 15:43:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d03048bfd6629d005df6019e381e85a9 SHA-1: 009b599c18676c94dedbfca7db8a794c8ef621d6 SHA-256: 32969d1a11b684eecf55f49e27d8592df4b53042e0e0a8067c5cabd04ac00548
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting it's part of a link farm designed to manipulate search engine results or redirect users to malicious content. The presence of external URIs and compromised CMS upload links indicates a pattern of leveraging vulnerable web infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ashokarefrigeration.com/userfiles/file/kekamigep.pdf In PDF document text
    • http://atreve.eu/ubezpiecz/obrazy/file/surofexijororasavunibud.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/945d766fa4f29f93866d0a973985289b/titexas.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc7c13fabc---nuzapumolorafarum.pdfIn PDF document text
    • http://agilesolutions.in/uploads/karunofebapi.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/8db67da9a837569af2289a54d8b364ac/65283258942.pdfIn PDF document text
    • http://pileshoppen.dk/userfiles/file/vimareruviduwamis.pdfIn PDF document text
    • http://meteosputnik.ru/userfiles/file/betorurelowaloxej.pdfIn PDF document text
    • http://greece-ex.com/images/blog//file/28238340666.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/1d358cba49fe58457e70c47a6fe09495/96203185334.pdfIn PDF document text
    • http://security-m.jp/tool/images/file/52220801596.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/t5aiqaphv1okqkh28psfenli70/10024322578.pdfIn PDF document text
    • http://zvezda-rostov.ru/ckfinder/userfiles/files/mukukujinixunenu.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160836be8b2410---tusokogerezipeg.pdfIn PDF document text
    • https://firmabudowlanawalczak.pl/web/uploads/files/badezaninomidobejebisidon.pdfIn PDF document text
    • https://cremyco.com/app/webroot/docs/file/jelizofozi.pdfIn PDF document text
    • https://vinisfarm.com/wp-content/plugins/super-forms/uploads/php/files/3ce5d4c0089e6b8696a3ffc080e74f65/60585701094.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/63b0f33280301b7f8d48bb2bcbcea7a7/bumoderovelivazobo.pdfIn PDF document text
    • http://humidorio.de/ckfinder/userfiles/files/22562080154.pdfIn PDF document text
    • http://banglatalkies.com/dynamic-images/cms/file/69325187753.pdfIn PDF document text
    • http://tion.hu/upload/file/80141172807.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/pideviwevirulujosixud.pdfIn PDF document text
    • http://baove24h.info/upload/files/62916860064.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=fistulas+colonicas+pdfPDF 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_off0000d967.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD967 17016 bytes
SHA-256: f10c8b2095c5efdc3f3dc05ccdd9617372cfb10fe620ed81bab30110a79cd319
font_01_sfnt_off0001053e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1053E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011d55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D55 10456 bytes
SHA-256: e97874b85dee76a2babe90f50c74d6723c2241e6fc4a76b4c5d8a5e88df24a67

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