Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee7392788a8c8a6a…

MALICIOUS

PDF

189.7 KB Created: 2021-07-14 00:26:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 79f1da86d89b555af5b3fd27e60bd44a SHA-1: 7a0a7de0209f8fdfdb5bafc63027c100cf825305 SHA-256: ee7392788a8c8a6a70a3be545793b4e98c947a3dbe03c5ff8001da700e152baf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to redirect users to malicious content. ClamAV detection and ML classification confirm its malicious nature, likely serving as a phishing or malware distribution lure. No scripts were extracted, but the structure suggests exploitation of PDF vulnerabilities or social engineering to drive traffic to compromised hosts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8882

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://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608fc292b83dc---95618133646.pdf In PDF document text
    • https://aldwalia.com/userfiles/files/givojin.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9a3e2c6c1---nikuvojipufolowud.pdfIn PDF document text
    • http://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098fc4357c59---59102897095.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759b391d21e---25734900708.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5af6a860a8---90084686728.pdfIn PDF document text
    • https://proia.bg/userfiles/file/60959086313.pdfIn PDF document text
    • https://purevdavaa.mn/uploads/ckfinder/files/62863494881.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/rejikuved.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b789c2d1b3---70455877918.pdfIn PDF document text
    • https://rusepress.com/uploads/wysiwyg/files/kegupab.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/7trp5drtb1mgig646gvb5eb1pb/wabinomaforuwekililo.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d79aa3987---bekuzudaxiludajelogiz.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/eac52401da2673353a3fa6db0fb221d1/raruwebiruwukilebozuzivu.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/6af677c0b320f143a3533f423f04cdfd/sabun.pdfIn PDF document text
    • https://atraba-holding.com/userfiles/file/5455867868.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160814067b3e1e---daporawuzetaweketepaz.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/5301s3ut7f5l2bk1r406931lm1/xatenufelarolofip.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/13607852555.pdfIn PDF document text
    • http://border-inn.com/CKEdit/upload/files/mopulewowe.pdfIn PDF document text
    • https://hmjrgoldhockey.org/wp-content/plugins/super-forms/uploads/php/files/5484f991ed5bc375a168dcabaaa98ce5/54936111932.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c21fe1dc548---75125613252.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087acb9376f1---kotuwiwomixabezonalu.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ab8ec57f3be---vuvunusadazesikowegamoda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=more+easy+goingPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f830.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF830 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001103f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1103F 155520 bytes
SHA-256: a37840f3a7ebbafe08f9f60f5f75fc2525bce58243e8754ef69d7631dc6feaae
font_02_sfnt_off00028f43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28F43 10248 bytes
SHA-256: fccad4c1fb90be43e978a3ffc26c9e3f5f68b112ee0c5bc22319845fd1a05e55
font_03_sfnt_off0002a66a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A66A 16688 bytes
SHA-256: c1138e527b8101f179009b880df81cb431551e0ca916e1e24ea96a9e54f73966
font_04_sfnt_off0002d1d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D1D6 16060 bytes
SHA-256: 8bfc5e2f6383778b4716e60c732a7e5228106b692ca52c1f6b3c0b2892049825

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