Malicious PDF — malware analysis report

Static analysis result for SHA-256 67938692174d87f0…

MALICIOUS

PDF

86.1 KB Created: 2021-06-29 00:33:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b5f54777681376c45f976b2927d45656 SHA-1: 230720126d17404d7ed073592afeec0575a2eede SHA-256: 67938692174d87f048ff074e5a428f3b1bac022aff854e4d394474ea95c92169
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised websites, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of external URIs and link farms on disposable hosting reinforces this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://nomylo.ru/uplcv?utm_term=phobia+of+leaving+the+house+called
    • https://bowenpainter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2e197f1c0---23597869132.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b4a476ace---vitebesaw.pdf
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160aa01288eabe---givuwutugilagepib.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073043640683---7657149354.pdf
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/79bbaad1e15a691d7112a60c53fb72e5/2336076145.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/9kp4b3gtodppekshimo3asv3m4/gizexad.pdf
    • http://cw-cut.com/uploads/file/52093481244.pdf
    • http://nowator-zpu.pl/userfiles/file/belazuwuvatu.pdf
    • http://omgmediatank.com/userfiles/files/20911954273.pdf
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/73f98a9336eb6e3d90b0f9a6a2429a09/82136968275.pdf
    • http://sts-logistika.ru/wp-content/plugins/super-forms/uploads/php/files/d5e4dd39eb16236b27d76189e0ea6e59/novawudiroge.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/3mt23h3pmb2gfitb3sha6ka8p4/52356868280.pdf
    • https://powermailer.in/userfiles/file/23033371689.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/28bd11b18d322d0042b5f85aa9606b29/maxofa.pdf
    • http://humanitool.ru/userfiles/file/sagit.pdf
    • http://studiosimonepantaleo.it/userfiles/files/32511625602.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608796e74ed6f---pakilegufomezan.pdf
    • http://mooneyes.pl/userfiles/file/rifewuruwedexedinojabit.pdf
    • http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa1db06353---nekedugulugumigefameku.pdf
    • http://korvet-sp.ru/userfiles/file/9401576561.pdf
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a8850be6b---fatixaloketuwemuzopi.pdf
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f150e7dfa9---jogoji.pdf
    • https://glowskincare.net/wp-content/plugins/super-forms/uploads/php/files/fe0f3970c0c4b570ba6fd1bc07eb8dc4/kewunofalopiluputo.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_off0000ee3b.bin
40d5753a11d54aef64cec06625b5a455688f5dfaf39db5f845a43d86f4c975bc
pdf-font-stream PDF embedded font (sfnt) at offset 0xEE3B 10960 bytes
font_01_sfnt_off0001076e.bin
7169783ac9305a0ce528ef8b9b28ec1ca5702882a049b1bf0a7be2c28d51f10b
pdf-font-stream PDF embedded font (sfnt) at offset 0x1076E 16848 bytes
font_02_sfnt_off000132f5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x132F5 16792 bytes