Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0f47694b2c98c2f…

MALICIOUS

PDF

91.5 KB Created: 2021-07-29 16:54:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-27
MD5: 794a01ef04f32551f5b53dc8a2f024ec SHA-1: 133e50f5536aeade11a8795face7672d801e54da SHA-256: b0f47694b2c98c2fa9276685685b737263659bab3d76fe179ebd07750db13a89
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to various websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://duext.com/wp-content/plugins/super-forms/uploads/php/files/5b4a783e1ae396c32ff0f7d0d5ed70b5/46824759478.pdf In PDF document text
    • https://growmytruck.com/wp-content/plugins/super-forms/uploads/php/files/ccaf64aec4ed36841e49b39fa2390f7d/31187962340.pdfIn PDF document text
    • http://acudrved.com/ckfinder/userfiles/files/38500925732.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/ropen.pdfIn PDF document text
    • https://systematix.pl/userfiles/file/gexemoro.pdfIn PDF document text
    • http://thebrownbag.vn/upload/files/73091951684.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/efof.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/72de529e98e60538e1210eed4a156580/rovapelibobimafokor.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/huhb7344dk4fbom5vnh9gt1nm4/61956046357.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a47c09b4404---87527948903.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882b9cd821c---somogazunileg.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/34016484516.pdfIn PDF document text
    • https://actorconseil.com/files/file/nusetuwatugovasojupoki.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/sisunezixikixefexa.pdfIn PDF document text
    • https://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/pd2g1mssqr2gkhjksmps3qcnj7/1928009750.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/5f18293a298e1969054773e6b5aec341/21160946279.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/70873452262.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/vofitaladexufevozik.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/75348626569.pdfIn PDF document text
    • https://geniodelweb.com/file/26687409137.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c92d0f02a5---wugujesakevolon.pdfIn PDF document text
    • http://jhroseclassof77.com/clients/45984/File/56852906235.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/d4308f26743aa92b6212e90e7aee1352/fogokolodajekiwusovurukaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=dauntless+weapon+upgrade+guidePDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f593.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF593 18676 bytes
SHA-256: 2e66ac6b8a39619c90ee720e9a707a423a5288f4a6121c1fe393e7a9209ff34d
font_01_sfnt_off00012654.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12654 10752 bytes
SHA-256: c1fd05750b6fc41a3164fe91aee60ed1ac821c8ef64c28e05284f98cbec2b406
font_02_sfnt_off00013f02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F02 1732 bytes
SHA-256: 5b3c947262022625ef2d4cfb2d0fa10a94f23c97611fd4c7364bfcc62a76ce6a
font_03_sfnt_off00014736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14736 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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