Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4cb9ab4fc42c33f…

MALICIOUS

PDF

93.8 KB Created: 2021-06-15 22:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2d9e2098e433a6df8bb56ca0670c8004 SHA-1: c9754bdd79a52e45b8df8ebeb71bdcdfd2774321 SHA-256: a4cb9ab4fc42c33fe38ae60a1363063bcac2d6a79dc5bf3761da5c5cd69775a2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of an advance-fee scam. It contains numerous links to external sites, many of which appear to be compromised WordPress installations used for hosting malicious files. The document's content and structure strongly suggest it's designed to trick users into downloading further malware under the guise of prize notifications or parcel delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://allytemp.ru/uplcv?utm_term=blockman+multiplayer+mod+apk
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079c50e024bd---fopobesem.pdf
    • https://ystechpro.com/nbloom/fckuploads/file/depedenujeba.pdf
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c6c7930dc5e224f6c4e149e6ff615425/97471113264.pdf
    • https://vuaship.com/wp-content/plugins/super-forms/uploads/php/files/m5l38sbiicmrojo46tfbbpd9d0/26857492701.pdf
    • http://stacjaregeneracja.pl/userfiles/file/xogifelodafagigepagu.pdf
    • http://work4shop.cz/userfiles/file/sovavifudadifatuluw.pdf
    • https://moto-trend.cz/public/files/fck/file/mufaduxaseje.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608b64d9d7920---sedisabemipovakogakakazow.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606e9d758491e---33824074499.pdf
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/26e1075ae8556ced1cafa6d8d41c3876/fenefobaw.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/30c7248hbsq5q48pk065blfdos/kozuxezanagige.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/mvbu62qm23rp463ri71omgl9b6/48207746496.pdf
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/nfh81jp1si4g7v0ds6b4gkai12/12256309398.pdf
    • http://allasclub.com/campannas/file/desipadifepoxekevifakiz.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be7eaf3dedf---sidekinubebof.pdf
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/c188cb54774090a2d3d7fe4030514390/janufogokuniwi.pdf
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/i0ejcaa1f1va6k55gs2ge11399/bosogo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000111c2.bin
3a99bfcc8a6322cb1f5d9dd0c76c95525b0630114fc12c53a342d41e6b6e0e01
pdf-font-stream PDF embedded font (sfnt) at offset 0x111C2 2960 bytes
font_01_sfnt_off00011c32.bin
611bd29fde3fa682acb53ac5d8bfbe1dcd33ae3cd40445d9fa6576c8a70f8f6c
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C32 5256 bytes
font_02_sfnt_off00012e09.bin
e5a2c3b16840d17044e85fbfc06a3fb5b1193b81278f3b92204f8e376eaa5066
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E09 11084 bytes
font_03_sfnt_off0001540d.bin
b5eb0c8c471b2afc781f77c7e212c20938277b58e0202ffda33bb65438d82c0a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1540D 16236 bytes