Malicious PDF — malware analysis report

Static analysis result for SHA-256 03765d91aa08d3df…

MALICIOUS

PDF

87.9 KB Created: 2021-09-09 04:03:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 09b1969da688803bf87e9d17c323ebb5 SHA-1: dffd3551d3cdd7ca43e9e0f9b291cbdef41f203f SHA-256: 03765d91aa08d3df8764d5ac696a4b1c3a2c33c690746d54a9a8ca6e8f332a74
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs, several of which point to compromised WordPress upload directories. The presence of these links suggests an attempt to redirect users to malicious or phishing content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://movitecnic.fr/ressource/site-image/files/97398534468.pdf In PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4d5dbafe3---64208209741.pdfIn PDF document text
    • http://hagelkonzept.de/userfiles/file/pigatam.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/oq5hml6ugvk2p4mkboqkdgpdqn/18387200748.pdfIn PDF document text
    • http://saaretravel.ee/images/file/48227699740.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/tisojuvokukadam.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f377a04bdb---nikegoro.pdfIn PDF document text
    • https://butyfarm.mm520.net/userfiles/files/27094825980.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/16135a5f97631f---21986931011.pdfIn PDF document text
    • https://gilbertems.com/videos/file/gibigowajurekunipuva.pdfIn PDF document text
    • http://zensushidanapoint.com/uploads/files/lemilabuzobum.pdfIn PDF document text
    • https://eravukappalpalli.com/userfiles/file/wazazigavipodugutoj.pdfIn PDF document text
    • http://indecomavo.pl/userimg/inc/daxixug.pdfIn PDF document text
    • http://halmar.info/userfiles/file/6424883408.pdfIn PDF document text
    • http://mensagemcrista.com.br/ckfinder/userfiles/files/96030783469.pdfIn PDF document text
    • https://eatorhours.org/e-bussiness/fckimages/file/61787998283.pdfIn PDF document text
    • http://klasykarozrywki.pl/public/images/fck/file/16687085945.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/ef9a7904d8e194609eb36e340b0c21bf/pobajupi.pdfIn PDF document text
    • http://autoscuolemontagna.it/userfiles/files/92575177105.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613342ecb68bd---nemimegep.pdfIn PDF document text
    • https://rafaellopezehijo.com/upload/files/47748683536.pdfIn PDF document text
    • https://888nv.ru/userfiles/file/kelub.pdfIn PDF document text
    • http://christembassydocklands.org/wp-content/plugins/super-forms/uploads/php/files/5a5c1296b3c52e0bfada74ed79745611/fitukaxiti.pdfIn PDF document text
    • http://okvin.org/userfiles/file/54164039154.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=idle+frenzied+hospital+tycoonPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A6 17380 bytes
SHA-256: a74c10de31592c1002bfe2cde1afc40e81293add75c577387ee47cb9c1338d78
font_01_sfnt_off0000f1d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D0 18100 bytes
SHA-256: 929129cc80accaa89e5c33e18502103a0f3ec8dc8d1b04e86a62e3458eef5b76
font_02_sfnt_off0001208a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1208A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000138a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138A1 10840 bytes
SHA-256: 3a90f06f9a37869936f39fdce848ba02fa3d52e8d1e418d41db81a1e421df298

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