Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e2db19a8b271f55…

MALICIOUS

PDF

91.8 KB Created: 2021-06-28 16:26:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0a8b97219ba5a886d82a8bf15fc372bf SHA-1: 21058efa3c0e824aea0d21ff2b3e26757c9dc988 SHA-256: 2e2db19a8b271f55dbbd8ea0ef16da4295c1d64a64eb5f2ef112d707e619b2de
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall detection strongly suggest a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://ateliergermain.net/sites/default/files/file/61078816839.pdf
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093f4b90b196---gupofozujijolafewumo.pdf
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a7b5b08798---24093020695.pdf
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/ec4946ec353347ad095e70c12da4e271/wetedorikevapi.pdf
    • https://archltginc.com/wp-content/plugins/super-forms/uploads/php/files/1328e87bc7fc1b9e53eac6f6c7ed180d/30315938895.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/wuliveposalarebulazux.pdf
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4a32bb187---jotimajunugovudefu.pdf
    • http://nakakinpump.kr/fckeditor/upload/file/75910834337.pdf
    • https://www.partyshuttlebus.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609b0ef578a11---19877531445.pdf
    • https://aluminiosarla.com/userfiles_arla/files/23573383451.pdf
    • https://manuscripthandler.com/userfiles/file/4690034512.pdf
    • http://cnkls.com/userfiles/file/1624562716.pdf
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ff4c2b19f---98066146354.pdf
    • http://accessiblevehicleservices.com/userfiles/file/17091403732.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609c657ce9c8e---76466227301.pdf
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/303fba94948398ab9c2abaea56630ff8/45920335997.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce74ca35c7---40413097681.pdf
    • http://alibabashipping.com/userfiles/file/69483046658.pdf
    • http://primaria-ciocirlia.ro/media/file/zavufizawolofujanaruse.pdf
    • https://www.ideaklinikizmir.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075c389b430c---kixopabozobonewuwebi.pdf
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/7cd4d6c70d19396c30ed591ee994622e/velepebejuketadivakes.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1609dbff30861e---96631887336.pdf
    • https://idd.no/ckfinder/userfiles/files/mazaxuwosuzulanexomorabeg.pdf
    • https://www.qbuildsoftware.com/wp-content/plugins/super-forms/uploads/php/files/e67dbc51211b1b2dd923c6317f8eb6a0/66766457800.pdf
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16085bd27754c0---nopumutugorapatit.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+start+teaching+english+grammar+for+beginners
    • 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_off0001033d.bin
0e1b85e7885e4497743c5d0e0c9d8232a7a2b37e5d298d857c43ce47dc084b88
pdf-font-stream PDF embedded font (sfnt) at offset 0x1033D 11000 bytes
font_01_sfnt_off00011ca1.bin
5615e87e019629ae3b671ae53f2446e87e4ff6fc4b8deb2d27fb24aaab498763
pdf-font-stream PDF embedded font (sfnt) at offset 0x11CA1 17164 bytes
font_02_sfnt_off00014948.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x14948 16792 bytes