Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f483e556e78315d…

MALICIOUS

PDF

91.0 KB Created: 2021-06-29 02:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dac49e4003c1152956d2e0c4368bd933 SHA-1: 14abedf205162117fb2ca2a2c4cb49bc27fd3585 SHA-256: 6f483e556e78315dbcb0bec5a8b7514dd056d414dd8df522e17d82bf08be923a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The PDF's structure and embedded URLs are consistent with phishing or malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

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 https://crewmak.ru/uplcv?utm_term=i+hate+life+quotes
    • https://autosaloncenter.com/uploads/file/malebegatisiziruza.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/4c32dcf8fb055269afeb9ffebf145f45/lawokanereketaj.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/q9ib56g86lsq96btf8qeiokt0f/gelatofanavijibenulepopib.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608ece8c0bb06---60919012462.pdf
    • https://alteanetworks.fr/img/file/taligeziwukep.pdf
    • https://pjkconstruction.ca/images/file/fikugeboket.pdf
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c872b90a18a---zapinokisufatexufo.pdf
    • http://zhengfutz.com/v15/Upload/file/20216101237254561.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/7282p1634ph380o1cnjaff9on9/jarikonabi.pdf
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608569d195dcc---11421673466.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607a08438f19f---37557432729.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/2f59204c21a97eca416e5ccc506c9e9b/96327972239.pdf
    • http://fine-cottage.ru/userfiles/file/96275894148.pdf
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/dgd1ln17gst4h6g1f6ul67fd97/65141554833.pdf
    • http://xoblates.com/clients/e/e0/e08cfb93fb97b00c28394d0532709dc9/File/konodivefupomofumulumote.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/1ceopf41lgoeflo3uufpgdmkjl/pekakafuvotubuviduruz.pdf
    • http://chothuexeninhbinh.net/data/dulieu/files/92796627358.pdf
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a072a8e96c---tapadobixawimusuxapu.pdf
    • http://wmc21.com/ckupload/files/vebubozunomejegaxeluvitu.pdf
    • http://kompletucetnictvi.cz/files/file/134995099.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/40bcda5932540928df471b80be56789b/89752255688.pdf
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/424fa0e805e99ac702591a8625e16a9d/womutapakebuvuwevefidi.pdf
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a870612b83f---tuwig.pdf
    • http://ipllaser.in/uploads/rusipulufepilokiru.pdf
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/c153611a84476cae4e78155559522e2a/90182588484.pdf
    • http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc50f8d208---82484922647.pdf
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/16079df824703e---zuxevoligivexuparijidi.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010442.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10442 16792 bytes
font_01_sfnt_off00011c59.bin
dddab99499c4f3af8c07f02dd1bc2c6ec04deebd38fb7005f0db69852b0c68a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C59 10304 bytes
font_02_sfnt_off000133b3.bin
adc7f2c73d04e823f9b5ccba18b8c14fc934124f59fbffb3e08bd1ac5bf1ced0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133B3 16696 bytes

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