Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cc703fca4e5eeda…

MALICIOUS

PDF

222.4 KB Created: 2021-06-25 23:25:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b317e72012ea57538b74df51749b2857 SHA-1: 18c3ed4e26b5f5c4f44cc4ecbbe2f575d7adbe1f SHA-256: 6cc703fca4e5eeda6a5e9990cbdd78a5bfb195ec8eae22b4e459ca2506d5f130
126 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, likely intended to trick the user into downloading a malicious file. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links to compromised CMS upload storage further supports the phishing and download lure attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9007

Heuristics 5

  • 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.
  • 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://xedaptap.net/userfiles/file/sozexujuzojef.pdf
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/b239842d83c5559702a88df0d63a352c/zegalobixefajemefi.pdf
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/70mi44d26aer1ie83v075hcaof/duwijomasofawow.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/a0f013p2b27gqsr37ugqmtfj23/lekimosep.pdf
    • http://augustaelectricalwork.com/editorData/file/sojujazak.pdf
    • http://studiotecniconuti.it/userfiles/files/87779155151.pdf
    • https://belhasasecurity.com/userfiles/file/17053455688.pdf
    • http://urparitet.ru/admin/ckfinder/userfiles/files/vuvixojup.pdf
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9f53aa9122---39930191835.pdf
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/6790b1287b8b842e560a4845751e5834/28679976052.pdf
    • https://mamotato.ro/userfiles/file/48417394687.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/d5a16d4714defca618849794af542782/biluz.pdf
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec57e27f43---rurawedorezarazaf.pdf
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9f5b58d0d---rabazi.pdf
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/17972a2c3aa2665bc2976bae1f5712a7/kitisenelasiro.pdf
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607a61822e89f---piwez.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c1bd21cec23---50502564151.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ad0051d9cf4---zetedumujafovexeluguwewij.pdf
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/d3392db9025c065b30743e9f6eeb5450/gosojupafiv.pdf
    • https://markeishahall.com/wp-content/plugins/super-forms/uploads/php/files/f4efcc9d2b432814fc0f03d9a05570c5/24414949439.pdf
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160706af17b5a9---wedonugabupunefowaxadufes.pdf
    • https://www.uniqueartzz.com/wp-content/plugins/super-forms/uploads/php/files/akgrqqg6197mfakk5tm5shrfgh/nizukij.pdf
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/5ihu1fdes06pcvduqr56vm9c2v/84270895366.pdf
    • http://skincarebylaura.com/clients/862251/File/75193762293.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606e47b4eb9c1---98742070577.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=1000+most+used+words+in+japanese
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001aadb.bin
7ff567e4d8b732f34e16715cde24d75cdfd07051a289d3ad62d63f2b6aac8c7e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AADB 16700 bytes
font_01_sfnt_off0001d4f1.bin
c0d8510aff6ba2b42857116d6be015fee6fd4ef544b11c75ab5fadc2a1341e19
pdf-font-stream PDF embedded font (sfnt) at offset 0x1D4F1 10900 bytes
font_02_sfnt_off0001ee27.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1EE27 16792 bytes
font_03_sfnt_off00020636.bin
45f1d189b1e8a2ea9224c752653d19170645e99a7d35760df30bb43b516e5014
pdf-font-stream PDF embedded font (sfnt) at offset 0x20636 143580 bytes