Malicious PDF — malware analysis report

Static analysis result for SHA-256 85eed2263bd5fefa…

MALICIOUS

PDF

88.4 KB Created: 2021-06-25 17:17:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9ab42d640c386a27fcff660677361c2a SHA-1: 7d07c6c4d0e80965b28288151039f68c9e52f785 SHA-256: 85eed2263bd5fefabbd62ed8828b4600990b794ae3793246f9ca8b1f9ac4043e
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. Heuristics indicate it functions as a link farm, with numerous embedded URLs pointing to potentially compromised WordPress upload directories and disposable hosting. These links likely serve to distribute further malware or phish for credentials.

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://graviroz.hu/ckfinder/userfiles/files/powezozofefamovozukiwop.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/4b5cc15d1943c225e7f92def0e185d2e/1631401886.pdf
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a54f4233264---49511190225.pdf
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/1f7e7b0d06eb112d593cf1dcb02385e7/95841779924.pdf
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/6ff5d6097fd1830cb2977429a94b96ab/pekojamagabivogasuxa.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e37505862---90860728460.pdf
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1609e6483254c5---86679025819.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160764de5114cd---46309392227.pdf
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/de709066a7a05daee1394321a7fca96b/xamutajadaketomuma.pdf
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5e9b048e9---siruredixopugoxogeja.pdf
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608d11dce1f15---fesuxekutogexojerurab.pdf
    • http://kayapaliinsaat.net/file/30471958363.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0616e305b---56591653962.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/2cddbd32838792d08c9741cd0c644765/gosodimisikudejuz.pdf
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160bbdbdf81325---widivodurewovowes.pdf
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160708834d3f9e---malin.pdf
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/717k76ss2g4r0bvlk291h6vfv4/7671085247.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7bba80bea---begubapij.pdf
    • https://traonguoc.vn/wp-content/plugins/super-forms/uploads/php/files/f34enni66mh927m4kg7jk686cc/lupukalaj.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607a718f71569---fozexovazaxix.pdf
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/du3hhoo1mth94gh478icdb0h2h/52484566312.pdf
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/39hs1gamss45qh6tss5unrb4q1/gugige.pdf
    • http://wxeina.com/userfiles/files/gariwitogezemivanofuva.pdf
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/5f7f903c195708005f91c70d628ea0d6/bixerejajituluduxixogisan.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=why+does+my+car+jerk+when+i+shift+gears+manual
    • 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_off0000f6e2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E2 16792 bytes
font_01_sfnt_off00010ef9.bin
eea29c75297643ad0c81ade4ca14def09ca23aee86abb04ad39cd1fa70d93a12
pdf-font-stream PDF embedded font (sfnt) at offset 0x10EF9 11436 bytes
font_02_sfnt_off0001299f.bin
057f03f187f10499339d735f3da339ef008014283bfa96c7465e77b5ebe7ef12
pdf-font-stream PDF embedded font (sfnt) at offset 0x1299F 16436 bytes