Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbb1ce1bf6659b31…

MALICIOUS

PDF

93.3 KB Created: 2021-07-23 08:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: d5267f9c7244c59db8a3b31ae0572d20 SHA-1: bea5adfcf967bda85d53942f6e703b0b4bb82803 SHA-256: fbb1ce1bf6659b31c722cec5f61fc892bb40324fbb636cfea8cc38c0f8c41d7c
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to numerous compromised WordPress upload directories and other disposable hosting sites, as indicated by the 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristics. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for SEO manipulation or to serve phishing content. No scripts were extracted, and the document body was unreadable, but the extensive link farm is sufficient evidence of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://allcreaturesinc.com/files/files/44138542745.pdf In PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/c89b41e58fe381c266850a6a2b411dd7/kafinebaberi.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da3ba60318b---fovomixorepokaju.pdfIn PDF document text
    • https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/e488d1afd5f2d729554d62d53bbaad23/15520969216.pdfIn PDF document text
    • http://ngpsusa.com/wp-content/plugins/super-forms/uploads/php/files/v97n158qn41c87gjugt52eq1gf/babulasumuzefete.pdfIn PDF document text
    • http://mediedil.eu/userfiles/files/xezexopojuminavuni.pdfIn PDF document text
    • https://europartner2.pl/uploads/49725576199.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/5287402851.pdfIn PDF document text
    • http://nbpcpentecostalchurch.com/clients/65183/File/55979739506.pdfIn PDF document text
    • http://gptools.net/userfiles/file/32655298574.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/mnfr1b807p8mc1sroep1f4nag0/tafikegupet.pdfIn PDF document text
    • http://kino-profi.com/wp-content/plugins/super-forms/uploads/php/files/22d0756a56c134d597319e1defa18d74/xemegowokoguwul.pdfIn PDF document text
    • http://brezov-gaj.si/uporabnik/file/91343331673.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/16043928014.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c85300abc5c---raxamovava.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/doxudugefaboxaxamowufa.pdfIn PDF document text
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c463b2bbbf6---46126041127.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b3c07787f---lefifewirovuwu.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16095456160daf---jilimufemugesavamijoxobu.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16078048bd36c7---90325027798.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/2d336f8e0b16524d55b58a1b79d57ee6/sodatupifutavarozeginudev.pdfIn PDF document text
    • http://www.cbs-emballages.com/upload/file/57753153832.pdfIn PDF document text
    • https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a14d91c53b8---wodipepebubedopudekoluj.pdfIn PDF document text
    • http://blossomtour.net/FileData/ckfinder/files/20210702_9D9AA33FCB1BFA98.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=inverted+hammer+tradingPDF 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_off00010ac9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AC9 10380 bytes
SHA-256: d10521cdf8e987e61ef2d8a40d350d5de2ce5634258379c29d7e7898b7326714
font_01_sfnt_off000121d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000139e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139E5 17492 bytes
SHA-256: 03b02865c1c00553125769ea4a501707b237739a27b585de0dd9b9f9f5f0f89c

Open this report in the interactive analyzer, or submit your own file for analysis.