Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc252ae035b982e7…

MALICIOUS

PDF

73.9 KB Created: 2021-09-04 02:49:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 75a918ca961cbb821bcfd6ceb33f6fc1 SHA-1: d6757085af59bc3b687d2df9fba9172afdcde27d SHA-256: cc252ae035b982e71633ebb90855a86b54f326d869cdef21a928469f3fd01ef1
156 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a phishing or malware distribution lure, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. Multiple URLs point to compromised WordPress sites, suggesting an attempt to host malicious files or redirect users to phishing pages. The ML classifier and ClamAV detection further support its malicious nature.

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://www.franklinwebdesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160835f3eb4de8---kakobi.pdf In PDF document text
    • https://capitalsyndic.com/userfiles/file/gakufowilobudid.pdfIn PDF document text
    • http://goldmustang.ru/files/files/romivirasepeb.pdfIn PDF document text
    • https://www.lipfish.no/wp-content/plugins/formcraft/file-upload/server/content/files/1607239721e110---difusoditabu.pdfIn PDF document text
    • https://chefinhogourmet.com/wp-content/plugins/super-forms/uploads/php/files/be80fac054c171db67686e2b177b3ca3/gokoza.pdfIn PDF document text
    • http://mhfmjournal.com/data/22/2/55/64/2544879/user/2788947/htdocs/userfiles/file/65991647821.pdfIn PDF document text
    • http://rrbrentacars.com/files/others/misefufifanakibixabolaset.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/5838652137.pdfIn PDF document text
    • http://flexicourse.cz/res/file/talutigomolejisisudukin.pdfIn PDF document text
    • https://autosofortkauf.ch/wp-content/plugins/super-forms/uploads/php/files/s24nqmcvoji802ncvqk0r96b9r/vawivimigiponomuvat.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b32700d4980---garadapupixibudoteja.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/82a82bba5cdfec7e0d95b6ed22ed2ce7/bokerike.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/03l143bdcqhjufjk5ssoq365at/vagawokexemakamedobogifaz.pdfIn PDF document text
    • http://mestan.by/images/file/69461432789.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1608c66e1e1583---jamezi.pdfIn PDF document text
    • https://sharzh-ufa.ru/wp-content/plugins/super-forms/uploads/php/files/2a004e6d1938e2b8fa4f3b9e9e4ffb35/tunewebunereraz.pdfIn PDF document text
    • https://dailyiat.com/html_upload/file/kowiwogebijorugupi.pdfIn PDF document text
    • https://raiporjai.com/piceditor/file/xusagon.pdfIn PDF document text
    • http://beloezoloto.ru/userfiles/file/97842201349.pdfIn PDF document text
    • http://krukewittfarms.com/userfiles/file/xibavak.pdfIn PDF document text
    • http://7onseventh.org/clients/868256/File/penekonox.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/e3d472caf9201d2f30ca6b47deb0c5c5/bupakitexaje.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/logijoxovupomuj.pdfIn PDF document text
    • https://acryl-bg.com/userfiles/file/38387260554.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/nifenatijovevovolexeka.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=goldilocks+and+the+three+dinosaurs+pdfPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000be6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE6A 16248 bytes
SHA-256: 97d36462b298e328b32465300b502e47d3776f17052b0fdc3eeb39148a2de8dd
font_01_sfnt_off0000e863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE863 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001007a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1007A 10948 bytes
SHA-256: a19f280638af86c2eda37e64b07278994c587b154ccbe45e27d531cf3808d4b2

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