Malicious PDF — malware analysis report

Static analysis result for SHA-256 0252fbd51c60c395…

MALICIOUS

PDF

86.2 KB Created: 2021-06-29 21:44:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d8f471debee24e4b77c4afac714f6a17 SHA-1: e4f8600d99952c943da11b87e7afde2224ddac59 SHA-256: 0252fbd51c60c395d4320e55e843338b2e4ad10665f008aa2f679c45da1437be
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites utilizing the 'formcraft' plugin for file uploads. This suggests the document is designed to lure users to malicious or compromised destinations. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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 https://crewmak.ru/uplcv?utm_term=bible+verses+for+difficult+situations
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160946654b9c14---72486779208.pdf
    • https://mangmalungtea.com/userfiles/file/49993110100.pdf
    • https://sieuviet.net/webroot/img/files/wigakulovamuxuxarifuwex.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/9j8b847tia9famqvpj0telli5f/35883184861.pdf
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076bc99bb193---mojogesupudezowov.pdf
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160af95deeb1f0---37035034174.pdf
    • http://dui-antidote.net/images/userfiles/file/reninigekebirugan.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afa67d1a90a---mibilobidalata.pdf
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/2272619a2f8fa70f0c2d59ae86311592/fomawikusisejeb.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e1bab88105---52928925407.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a67c30483c9---23630667012.pdf
    • https://acronimocostanzo.com/userfiles/file/fizopuzevuvisefo.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/2eae0a2fda9918b6f2a587b1330cb67f/govatudabagabedegaripoko.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160916fe122a20---31376954030.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/06f7506b8acb2c9e143db0fbc89e2c4f/rimut.pdf
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/4e4ba1b4d1969837b73dfbfbac72622c/wejavolilur.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/duqpgh0g5bqsbm5867hh5iqku3/bizib.pdf
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/a0d2060a714727601da3a6cfaa371d4d/93410265238.pdf
    • http://falconartistmanagement.com/ckfinder/userfiles/files/73345682974.pdf
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/81d0949531b4a4445e6cfcd9f9b59d13/putasagibepadisilil.pdf
    • https://cornerstonelaw.eu/userfiles//file/fevurodedijubut.pdf
    • https://handientu.vn/userfiles/file/19212193795.pdf
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/16084372e6ea8b---24280878044.pdf
    • 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_off0000eebf.bin
83a9470f304e8d7b75020ab5dd66113c15cbf4b0eeb49173e1176d77cf00a050
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEBF 16788 bytes
font_01_sfnt_off00011a54.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x11A54 16792 bytes
font_02_sfnt_off0001326b.bin
ae0b0405ce9fdaa7e063d3562da55e843a076196e0fe974415ad2588d95d9f1d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1326B 10828 bytes