Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee405e939d4ee67…

MALICIOUS

PDF

77.2 KB Created: 2021-07-02 03:19:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f4c9c4fc5b1cce30160d7f25553e3819 SHA-1: b445cd633e70182368ba4baff4dc44fd01483924 SHA-256: cee405e939d4ee6797f0eef3ee0fb0b68750a24e4b8a573a2cec2c39a86e4ec4
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous domains, many of which are hosted on compromised WordPress sites or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body is unreadable, but the heuristics and URLs suggest a lure to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://amrapalispot.com/userfiles/file/42159483648.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/mcpu57848b32alvrghhr0uij36/lakavovitipo.pdf
    • http://www.alcera.ca/userfiles/file/97698816099.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/sgq7o8osk5qrbn471pqbbb0v45/dedipitufewopa.pdf
    • http://evola.it/userfiles/files/19958963822.pdf
    • http://www.sphotobooth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e9108243b1---rebulavoredotaverasokovus.pdf
    • http://argol-editions.fr/userfiles/file/98613202971.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f3b4f7db24---koxigivikat.pdf
    • http://zrdb-drogbud.pl/Upload/file/39637357531.pdf
    • http://xn--dlek-5qa.com/admin/UserFiles/file/39832594243.pdf
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/6arscmq0lkqqif5nnkll3qntn3/93512152053.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16073528212024---maleranu.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e71089bb8c---tojipelu.pdf
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/9f401f59361384a1840111f4ef37a7b9/bakiw.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16092d5672022d---82089556935.pdf
    • http://kondicionery-ivanteevka.ru/upload_picture/file/66725530244.pdf
    • http://www.trafikyaren.com/wp-content/plugins/super-forms/uploads/php/files/hc4vp6fd2k2bs73l96o13pql34/47086545625.pdf
    • https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/66ceec0bffd186622604c8ecff189570/34035645233.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3b54fcf8de---42569921218.pdf
    • http://interiorconsignments.com/media/file/linexujivetibokapaxe.pdf
    • http://runningrhinelanderrabbitry.com/clients/875187/File/xapimevekodokafelaloj.pdf
    • http://willbramephotography.com/13884305755.pdf
    • http://russkiivopros.com/images/FCKeditor/file/dawoxo.pdf
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/8cca9fa90b903573f98866bb32f9b566/wuzaju.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=town+hall+level+8+trophy+base
    • 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_off0000cad7.bin
9a9269e006c3312d044f35c15a175a0eb11894660065238b1f50ae95643d4582
pdf-font-stream PDF embedded font (sfnt) at offset 0xCAD7 10836 bytes
font_01_sfnt_off0000e3b3.bin
32335cb25eea5a91743458edaef5149d7e263a1be384f48ffd26c7ce48ec8e40
pdf-font-stream PDF embedded font (sfnt) at offset 0xE3B3 16896 bytes
font_02_sfnt_off00010fa2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA2 16792 bytes