Malicious PDF — malware analysis report

Static analysis result for SHA-256 862e1908e0295ae0…

MALICIOUS

PDF

79.2 KB Created: 2021-05-14 21:28:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1129eb6af122c8385bd6e5bc50a8e167 SHA-1: 0ebaa24e7936af9135f380ef4a2932decb6793f2 SHA-256: 862e1908e0295ae0fdb0acb11103ce33b852fb9c1bd65f62eb1470fe09ab9604
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of an advance-fee scam. It contains numerous links to external PDFs hosted on compromised WordPress sites, suggesting a link farm designed to distribute malicious content. The document body, though heavily obfuscated, appears to be a lure related to 'Bible study materials' and financial transactions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608b93190462d---tilabemunodin.pdf
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160751674290a4---2002925285.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/9816abb8bbe6d3ba8be89c76580d5bf3/gerupinujabiwifaxararid.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608095d2a6e3b---83567503656.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/pdph677uq20uh1161hifpoj1ej/pigujuzekavufezawuzu.pdf
    • https://kassa-evotor.ru/wp-content/plugins/super-forms/uploads/php/files/8e2bv0lcqkb0uct1dea4g26ot7/pipobafawe.pdf
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c803c76dcb---31755582809.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/e3c94430d97bd037799412ba61c32def/ninezubodarugixi.pdf
    • https://andrejc.si/files/file/96562056287.pdf
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16087d8d669752---nimixekiru.pdf
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/1608282562569a---rinonizukilupejefu.pdf
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609db70cb4de4---77275724657.pdf
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0e6b2f233---bekemig.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2030e418d---ronakevaruxa.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/6fdbdeb407a16709bd5259308980f169/97248388042.pdf
    • http://voxel-avocats.fr/uploads/file/85600893040.pdf
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/u8jq60r5hmb59gndavgk32rlq5/rozezododopiveb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=bible+study+materials+pdf+in+tamil
    • 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://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea61.bin
f86b5438f1c859e616c0dcf4c5fd0366205a0b7a5d2b0311cdb03dc28d62a68f
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA61 5252 bytes
font_01_sfnt_off0000fc14.bin
4eb2484896ef9d8203f62fe13a19f144c0b0fed327247a2d820dfc48c2e6404e
pdf-font-stream PDF embedded font (sfnt) at offset 0xFC14 11484 bytes
font_02_sfnt_off0001216c.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x1216C 4324 bytes