Malicious PDF — malware analysis report

Static analysis result for SHA-256 968ae01844395f92…

MALICIOUS

PDF

91.0 KB Created: 2021-08-13 01:07:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: bdb76439d4cbac75722036032134b57a SHA-1: 4f9453b62d283f0a158efaff1dec068798b40ef8 SHA-256: 968ae01844395f92eecc198699f563e965513417060af6f4fba804c76c4aeffd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, indicated by numerous embedded URLs pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to phishing sites or download further malware. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://pistant.ru/uplcv?utm_term=how+many+jumping+jacks+to+lose+one+pound PDF link annotation
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/550e39e4d1ac94c7d17f73db286e7dac/82727494468.pdfIn PDF document text
    • http://mwclass197050threunion.com/clients/0/04/04fd426b2d2cb16e649a8dfb8bed347f/File/xufipovutonuralunilopuxem.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/9ac879b73b57f7f6a4aa23c546d6e0f3/31607373901.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ddac4599f15---50496322891.pdfIn PDF document text
    • http://lafayetteconnections.com/clients/52818/File/13142443106.pdfIn PDF document text
    • http://xn--80aantfcaehjbxzf1m.xn--p1ai/userfiles/file/jolinitufizizedapesu.pdfIn PDF document text
    • http://fgosvo.ru/files/files/ponojurapak.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/bujqd3ugn3bfridp0j6eg76e91/19282030105.pdfIn PDF document text
    • http://tjchenxing.com/filespath/files/20210805193258.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/4621641390.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/19309359048.pdfIn PDF document text
    • https://newsru.md/upload/userfiles/files/dopupevukerowuvofi.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1d25909b8---nexixup.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160affc27d687f---8060803779.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/41400529476.pdfIn PDF document text
    • http://boekenwinkelindex.nl/images/uploads/74167320981.pdfIn PDF document text
    • http://sad-azov.ru/wp-content/plugins/super-forms/uploads/php/files/bd315788f8bb574af88f45a85dbca839/37123530237.pdfIn PDF document text
    • https://georgiamusicpartners.org/wp-content/plugins/super-forms/uploads/php/files/389489bf373bcd7ab9371e674d6e72eb/51345788621.pdfIn PDF document text
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/eccc9532f358ded65b5e3b859699fc12/vuzamuleleledulutaj.pdfIn PDF document text
    • http://busangh.com/attfile/fckimg/file///20210531194633_636770534.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160828b4e3fc15---73772259339.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3596992b5a---41047861402.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/53978855439.pdfIn PDF document text
    • https://landtop.com/filespath/files/20210806224954.pdfIn PDF document text
    • https://datajournonepal.org/files/ruveriragezunelinad.pdfIn PDF document text
    • 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_off000100db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DB 11268 bytes
SHA-256: aad119b3a542451de4904fc5804ca94700f4a591157d408f35b9db6d5bb376e4
font_01_sfnt_off00011b1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B1C 16508 bytes
SHA-256: 0ccf254db2069a0903cb3f6061ff93449fb0a9dc85556324babc80fcdc161bb8
font_02_sfnt_off000145f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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