Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3226f9e38307321…

MALICIOUS

PDF

85.0 KB Created: 2021-06-30 02:54:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 93588483fa46d96fc8286f703925a90c SHA-1: 30da9af39ccac83797d9cb9c85c95ccf4d70c437 SHA-256: b3226f9e3830732168cb3d7cdfa288c9c31a63fbe7627bde8dc6c54f66a702b7
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with malware distribution or phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://www.bestlifepolicy.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16074770244c88---49642084666.pdf
    • http://itineraire-consulting.com/ckfinder/userfiles/files/dafukonig.pdf
    • https://www.heracles-hotel.eu/wp-content/plugins/super-forms/uploads/php/files/2po1e6d4h3ksu2tren2bg1q5qn/78685416870.pdf
    • https://yssnewlessons.org/UserFilesTwo/file/nuropadas.pdf
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/cdd15015711293610a77462ba766b2b6/podanoves.pdf
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d31f0f2532---bosenesakirakeruk.pdf
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16073bca7bf876---34468358936.pdf
    • https://plentis.eu/ckfinder/userfiles/files/rojokoxixakasoduj.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1606efef14e4d8---jimawoditusus.pdf
    • http://www.caslyn.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca613e945e---63714020519.pdf
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/16092778fc34c9---parafikagexetabinir.pdf
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cb61fddcfc---domusidusimo.pdf
    • http://3dtechgroup.com/uploads/image/files/kidem.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bbd7f326d2e---kakulevosogig.pdf
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/6571506aec8f6c565fae8ba016a9bcee/98999951792.pdf
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/6fa4b1304089a3003625999ed965c12e/77558620295.pdf
    • http://sp3siemianowice.pl/userFiles/files/funota.pdf
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/ug896cgie26rjhng9v8navo1b7/safuwupudifo.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb8f8ab131---potij.pdf
    • http://stellamaris.cz/userfiles/dupavogotezetatawi.pdf
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef8313deb0---tonasejovut.pdf
    • https://combrooncom.com/contents//files/53593632128.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/s6jj8d8f92jih9i62dh080e79a/gupotukur.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=storm+before+the+rainbow+quote
    • 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_off0000ea20.bin
3c929e708057be578ba844e7d9865a845f5e23515f2416165a9ea2da8c36eec9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA20 10812 bytes
font_01_sfnt_off000102f5.bin
76a5546c5fc331a4b8a330de57d67a8911566a228c07825613deb2bf315583d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102F5 16848 bytes
font_02_sfnt_off00012e82.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E82 16792 bytes

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