Malicious PDF — malware analysis report

Static analysis result for SHA-256 29cca0be0199779e…

MALICIOUS

PDF

85.9 KB Created: 2021-07-29 22:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 513c392acc7b75b5b044dc1d0a9a8689 SHA-1: 2fe1883827070f5327156e87f96b3fa8adf71c75 SHA-256: 29cca0be0199779efaba43171af65437b9b36da3381d2ad5f2d499632f636821
196 Risk Score

Malware Insights

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

The PDF document contains numerous links to external websites, many of which appear to be hosted on compromised or disposable domains, suggesting a phishing or malware distribution campaign. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document likely prompts the user to install a browser extension or update, a common social-engineering tactic. While no scripts were directly extracted, the presence of embedded URLs and the nature of the heuristics strongly suggest the document is designed to lead the user to a malicious site or trigger a download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://infrive.ru/uplcv?utm_term=general+microbiology+pdf+download PDF link annotation
    • http://donateagift.eu/userfiles/file/baremuropafalisuzaladaj.pdfIn PDF document text
    • http://pizzeriagiganti.ro/imagini_ws/jixiguvekoxa.pdfIn PDF document text
    • https://kaplaitalia.it/userfiles/files/48572290621.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070b2f00d1d2---vilumerer.pdfIn PDF document text
    • http://stopguepes72.fr/userfiles/file/bijuvafavesomi.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/23929261538.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/69278239201.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa0829469ca---85847677135.pdfIn PDF document text
    • https://neavocats.com/wp-content/plugins/super-forms/uploads/php/files/07345f909d6126c812ccc588b2eac748/12209056050.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/v6etosppo349cgivm1odmp1if6/jukowob.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b952df43287---lidoxisad.pdfIn PDF document text
    • https://rugerwafers.com/demo/ruger/beta/userfiles/files/xuwasofevufuga.pdfIn PDF document text
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/99081323730.pdfIn PDF document text
    • https://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/ffab56d4c59d3e5cb91aad6b1ab9fa39/dutevudijakez.pdfIn PDF document text
    • http://chiangmai-clean.com/user_img/files/93294095541.pdfIn PDF document text
    • https://marosme.ro/hirek/file/duxeronatogopalirozi.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/pkkn1s9mo1jdhct8lkf6dftg23/34142226711.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb48f5e38a---xovurodexifusik.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/5922934018.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/dae90bf54aca3c6bfe96ece7700f09be/ludixad.pdfIn PDF document text
    • http://maskaevlawyer.ru/userfiles/file/9366724843.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_off0000ea80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA80 17208 bytes
SHA-256: 2a634bcc439be956120e774b8f979098f356cf96c904772ac277d27f13f23be7
font_01_sfnt_off0001172e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1172E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012f45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F45 11076 bytes
SHA-256: 37508150216c5e0af7d316455d439d5b85d6d6a584db327ad9191a5214484169

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