Malicious PDF — malware analysis report

Static analysis result for SHA-256 9594e04d9b5f7ee1…

MALICIOUS

PDF

96.2 KB Created: 2021-06-28 20:06:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 97f220f63caee6179b8d200c86446813 SHA-1: 279eba681bbe3a544d84c385baffce16a9994956 SHA-256: 9594e04d9b5f7ee1ae6c0cfe6cce4479f1e49ec1b0601daf59c07454d3a67446
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ML classifiers and ClamAV. It contains numerous links pointing to various websites, many of which are hosted on compromised WordPress installations or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The document body is unreadable, but the heuristic firings strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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://archism.ru/uplcv?utm_term=auto+ignition+gas+stove+vs+manual+ignition
    • http://niengrangchuyensau.com/upload/contentFile/file/linopuvufabomiturokesafo.pdf
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/67328fe6a7564232fc807679c86a0591/15736407980.pdf
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/5b9aafbbeabca48cea8e451e8a6f365c/90043238024.pdf
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/39657248118.pdf
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/58229b1c1666101717de49185e520b2f/jaxutupirogofademekil.pdf
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b420000a187---zonaxaniwotikij.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/26fe742605cb2c4eb528b4d3b50cbea2/rovirizoboforadilegus.pdf
    • http://kidsjeodo.com/images/files/pifudazutoguru.pdf
    • https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/9b87d3eda4539a04cc7617869ac44d35/79927026566.pdf
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160736ed117172---xosumegutifugoluruz.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160838921a876f---nupomibagutu.pdf
    • https://tradingphrases.net/userfiles/files/tutatuviliwugo.pdf
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/e7dca602d974ea5c3bd1a0100916e47c/28855735013.pdf
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080c7ae19edf---zivevevamizefebiv.pdf
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d1ff297e00---74796560901.pdf
    • http://davcpundri.com/css/file/tevazi.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a96ee8c2b86---24427880178.pdf
    • http://mbcasc.net/imgs/file/fipokelato.pdf
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093412dee9bb---vugolabozufuka.pdf
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607022aa0365e---54001442234.pdf
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e70e2ac5f8---55988404902.pdf
    • http://bungefamily.com/clients/5233/File/pujuzikenekeloxujata.pdf
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mimebogul.pdf
    • https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/0aac7efde0d2c999791be50679f6ea3d/48309797772.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_off00011675.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11675 16792 bytes
font_01_sfnt_off00012e87.bin
fe677aa6eb6507f1d4a010694e0f34bc6d8b9c5e36fcbf42ce0810ed09897c27		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E87 17356 bytes
font_02_sfnt_off00015b59.bin
f9bb718303c10610260242ea3696f3158f0ad55ca0d4a5050104c2b000b4495d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B59 10496 bytes

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