Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3598ac22c8a52c0…

MALICIOUS

PDF

91.7 KB Created: 2021-07-01 00:46:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: beaeef648ef9f02986eabebe809f2a54 SHA-1: 7690bcc4f63f2847dc444d860971424440a72f4f SHA-256: e3598ac22c8a52c040379f079d4685eab6c0574410cb9ad38b474f7ea4da2307
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external URLs hosted on compromised CMS platforms and disposable domains. These links likely serve as a distribution point for phishing content or further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://drafthe.ru/uplcv?utm_term=hierarchy+of+needs+psychology+example PDF link annotation
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c40fb3c9653---rosudadomoti.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082c43509cc5---60136644564.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16087810c15aca---bumuvuzilewugiboru.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/darekagejubovupisebof.pdfIn PDF document text
    • https://kede.org/userfiles/file/85169445920.pdfIn PDF document text
    • https://flyfinz.com/userfiles/files/gedetewejifasesom.pdfIn PDF document text
    • http://billedbutikken.dk/articlefiles/file/76277339079.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/1be1cccfbe0b63dcefe66a82a7483742/larotamukukobimaniraruzu.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16073b11ebddb0---76316100787.pdfIn PDF document text
    • https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/3tsjl7bdqifrmq8b7hftb8212v/xonepejezogiw.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/d374ea675938936b93b9e5ce0febb91c/zozipewavopetigala.pdfIn PDF document text
    • http://ladyqueen.it/userfiles/files/37851771845.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608c46d0942c6---natagux.pdfIn PDF document text
    • https://tonitomov.com/picture/file/batevemoxaxos.pdfIn PDF document text
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/b559d804eafebc74a41578e6196bf71c/jirisal.pdfIn PDF document text
    • http://nuitsdartistes.eu/images/file/2708755566.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/20tmtlt9bjb0j3ngujo2jvevpm/zutem.pdfIn PDF document text
    • http://www.etoiles-recrutement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782354706fc---11630863539.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/180d957dc6606fce5ce2af7b550cc5ba/mufikumeladidarigis.pdfIn PDF document text
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ad92cde2c90---keritoxa.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/o67ik7oahvfrh235nso0vsn6nc/59639707949.pdfIn PDF document text
    • http://suachuaspa.com/upload/images-content/files/65503945411.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_off000100fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100FD 17772 bytes
SHA-256: f30425d96104bea71deefda46423e5882dc0e8460b53b2781ccc1e3a5d88bde3
font_01_sfnt_off00012fc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FC8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000147df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x147DF 11176 bytes
SHA-256: 95ce105a56387ffd0636a8d38d30910d90bfc79eb034139654203ce1cdc98c23

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