Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b7a49ebac8bcac6…

MALICIOUS

PDF

75.5 KB Created: 2021-06-27 15:35:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 57c87faebacb90ce469ca4204233a7ec SHA-1: 0b2d70b396ead1a4ddf49251b9c31fa5d614a1a0 SHA-256: 2b7a49ebac8bcac6eee8f863ab5e4f7d9f6a661c3f1fe09acf81dcfdaac2c220
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress upload directories. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16085236b13388---resipovavefiranosiwi.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16075f49a147f4---gabuvomi.pdf
    • http://bungefamily.com/clients/5233/File/16494713232.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/1dgth42lp2tg62gj9gsqci1u17/19223206038.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a5db0b60f77---zaxomevotubolegibu.pdf
    • https://booknowrentalimo.ch/userfiles/files/82783920425.pdf
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/639c5f192f8f37c95d6ad34ab7619838/97118192752.pdf
    • http://3duct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160913e7321bb2---95547108342.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160d4b35426dfc---11588665214.pdf
    • http://anthonyvienna.com/sites/default/files/file/2828654875.pdf
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b238aa6db27---xoroxupavivijav.pdf
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/9dsti53pf4jiq2iop07tet5rf4/94960079731.pdf
    • http://anthonyvienna.com/sites/default/files/file/21840286204.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/31c607a5a4509b74d2e54b25e373adbc/rumumamo.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc7c682353---doxalogugabefu.pdf
    • http://gentlemensquartersbarbershop.com/wp-content/plugins/super-forms/uploads/php/files/686d5db699ae975a6deeb725757768a6/jezelavatovonesifonulujow.pdf
    • http://riskhedgetech.com/uploaded/file/192816226160ccfcb5a5b34.pdf
    • https://ksuskalology.com/images/file/dumetedewakofewexow.pdf
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079b3d513162---38584478728.pdf
    • http://bertrandetgastineaudesigners.fr/userfiles/file/14623937998.pdf
    • https://baongochoa.com/upload/file/fowuwowidi.pdf
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1608116135d3ee---43989162172.pdf
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f51b4e7f8---48241940144.pdf
    • https://nobleanimalsanctuary.org/wp-content/plugins/super-forms/uploads/php/files/tmp/18469312160.pdf
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160a075916413c---84585128664.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=can+i+get+my+license+back+if+it%27s+been+revoked
    • 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_off0000c435.bin
d3255f2a3aed6aa5047419d97ddb1ad843a5d3e8485a35c755fb7d71a235ecb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC435 15980 bytes
font_01_sfnt_off0000ed8a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED8A 16792 bytes
font_02_sfnt_off000105a1.bin
54072bf12d8a871ca6836726f500e8b0d8932ec091f30b19e17e51b67b066695		 pdf-font-stream PDF embedded font (sfnt) at offset 0x105A1 11296 bytes

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