Malicious PDF — malware analysis report

Static analysis result for SHA-256 004c72442b4afaaa…

MALICIOUS

PDF

147.3 KB Created: 2021-07-21 11:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 30567454cf5740aafa7624bd56baf127 SHA-1: 32fec3d53b27dd209674722da467f16403156522 SHA-256: 004c72442b4afaaa42484bc122f1a13e32fd2df7d55791a8ae41d5af9ee032c7
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to direct users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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 http://thomas-reunion.com/clients/8/86/86f5f051d314e00f57792b8428d7085d/File/38785148499.pdf In PDF document text
    • https://vanchuyenduongsat.vn/upload/files/jaremebapemev.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084edbb609fc---97877748753.pdfIn PDF document text
    • http://1960vonsteuben.com/clients/d/df/dfb5e1b83ea85bfdc5ef1da934264264/File/vejaderukuga.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16090df9818bcb---14434839883.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a274e7c2b1---71344453492.pdfIn PDF document text
    • https://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/hsjcvrif0ajjmfifehjlpuu112/geponatikeze.pdfIn PDF document text
    • https://bititechnika.com/uploads/file/nenovemabedawiputimeki.pdfIn PDF document text
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/186b1b3d02d0ff3b41a082ce12a6d436/lowewereropi.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773803a16b2---gesofavajalusopu.pdfIn PDF document text
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5698e37d9---56717606580.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609226291288e---99720885767.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a009d647a64---36630144249.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609c39d826078---24658126478.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607cdb7a9f326---petoxesitamezu.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/6472ae2b45ba26174cd7397d04e0a02b/wevogudidalagesivafunu.pdfIn PDF document text
    • http://vrieshorst.nl/images/uploads/file/75243469184.pdfIn PDF document text
    • https://activepymes.com/pub/file/mejuxomigo.pdfIn PDF document text
    • http://computer-rudolstadt.de/upload/file/37644444152.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/5403521490fe6c5decf78b320c426d5f/befefumu.pdfIn PDF document text
    • https://hacunamatata.ru/wp-content/plugins/super-forms/uploads/php/files/44c3067fc6b48bdfe5381a25981d5145/xavebotit.pdfIn PDF document text
    • http://castudio.eu/userfiles/files/fitinetalatasowupixisiras.pdfIn PDF document text
    • https://www.waterlooarmsnewforest.co.uk/wp-content/plugins/super-forms/uploads/php/files/0d9d8db08b02b41f70c7717806dd168c/42930038032.pdfIn PDF document text
    • http://bindashnews.com/userfiles/file/24728126287.pdfIn PDF document text
    • http://cerezolorente.com/files/cerezolorente/_repo/file/78596657541.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=song+of+myself+section+33PDF 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_off0001de33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DE33 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001f64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F64A 10780 bytes
SHA-256: 869827bb0e32c812c644aef462856b4779eca70aabbe4a1054dea30310c6c673
font_02_sfnt_off00020f2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20F2D 18484 bytes
SHA-256: 30c0f177f58348284e572fc3325571395e889a80bab83af354206d86e3683e29