Malicious PDF — malware analysis report

Static analysis result for SHA-256 019465afe5f5d67d…

MALICIOUS

PDF

86.0 KB Created: 2021-06-29 13:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e10afbcd1b1f3a3431c89393fab42b02 SHA-1: 77280f6ee55e6676317c6c7b64de1afbc9057415 SHA-256: 019465afe5f5d67d464c552bf79064c63e1ac042166bf45571e0230db29dac6c
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites, which in turn host other PDF files. This structure suggests a link farm designed to distribute malicious content or lead users to phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bda977f0333---mefududirazopidowakezune.pdf
    • https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/5000f457fbda2e2a2ca2f2dbec9cbab8/86652361325.pdf
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/f8ec51df14527b85217f25c097b55ec5/siwubov.pdf
    • http://nhs1980alumni.com/clients/878257/File/65043688219.pdf
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077c6d98a764---devurimavaxodifiruf.pdf
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/hfnkassschij1t9pe3dmh52l0c/33106828135.pdf
    • https://anjingliar2.com/contents//files/49510902270.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/5p7cng92elfov6442o4jd4jtrb/73290105861.pdf
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/0015076a3822745de40fc12440749885/kiworidan.pdf
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16078b4b266de0---milebiri.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ae74115ba---rataxopimepigasujeripowez.pdf
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16089fa4c2f720---77030772086.pdf
    • http://iphysiology.ru/upload/tanogixazaxutujusokoz.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/6269d0cf3f000d83e646c6c39cbe21a1/gusibewiraxenefefub.pdf
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/plbb8dcld9chqjp8rkh68htbh2/47359120717.pdf
    • https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/eoau3b53vqo781n3l2npea269l/derew.pdf
    • http://www.mediacomriccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/16084225aac3ea---sudefinaxebofiluxiwo.pdf
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/3708e1752ea8640a4dab9420cb50a66d/dumazijakofuselovumetozig.pdf
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/61v60ljfmoi2hnpf9uefnm46g0/74159563697.pdf
    • https://welltowork.org/wp-content/plugins/super-forms/uploads/php/files/88b95d8b0ca390fd41d35989fadba2fe/popubudugenitozo.pdf
    • http://vizugy.hu/uploads/files/97486504556.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=cortical+motor+neurons
    • 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_off0000ecca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xECCA 16792 bytes
font_01_sfnt_off000104dc.bin
6085923ed8a2ae7ed3452bcf981a63ab8a1e80a0dc3012ceed77cf867fe1c1bc
pdf-font-stream PDF embedded font (sfnt) at offset 0x104DC 18048 bytes
font_02_sfnt_off00013366.bin
b155c24c357193ad97e18871e5ce91e9ff7588568a624fd0adb121e45a1f1c47
pdf-font-stream PDF embedded font (sfnt) at offset 0x13366 10520 bytes