Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fe5bc960f0e87b2…

MALICIOUS

PDF

83.7 KB Created: 2021-09-02 17:58:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: ba5463080a3624310a5d3b7d419c272f SHA-1: 09a093171ebeb0de0acf56d39f637a9b57e2cc08 SHA-256: 6fe5bc960f0e87b2a472eece1deb54c4ad2c46d12e9378468c8688ef9f802ead
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised websites, indicating a likely phishing or malware distribution scheme. The PDF structure itself appears to be a link farm, designed to redirect users to potentially harmful content hosted on these compromised domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/9lgar477ji01deu3484ml1eg7q/21191450325.pdf In PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d039d509b8---potuluregajurivagi.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1611cc0e6b827b---62071653341.pdfIn PDF document text
    • http://biurod9.pl/public/userfiles/file/54767544842.pdfIn PDF document text
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/a6ee594a922323da65e2abf8bfe926d9/98554768326.pdfIn PDF document text
    • http://www.dilipprabhavalkar.com/images/file/92936618042.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/43075209059.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/eaa494817542e077250a3e2a4602bc3d/xoruzofazexumukikojilijob.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/347645450.pdfIn PDF document text
    • http://wjcopy.com/upload/files/sajamukodiruzaxibinemupe.pdfIn PDF document text
    • https://akapacha.com/userfiles/file/37770937231.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/0h0uf4qi9kgjvikl05ju428132/4527509527.pdfIn PDF document text
    • http://vitalbafitnessclub.eu/userfiles/files/roxekopuvobiwagedopigip.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2bd76c4ee---18625262487.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/jutokinuzoveletikup.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/noparu.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160974e0823fb9---fuzumom.pdfIn PDF document text
    • https://gites-les-bardots.com/userfiles/file/1013910436.pdfIn PDF document text
    • https://electrodomesticaruano.com/images/ckfinder/files/razugasudasanijiturevop.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/54786095171.pdfIn PDF document text
    • https://clubelsendero.com/img_pag/file/murazakajigeripek.pdfIn PDF document text
    • http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d7dbba6e7---60501550397.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/vunilefara.pdfIn PDF document text
    • http://plncse.hu/php_data/file/78503606261.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=autumn+in+new+york+sheet+music+pdfPDF 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_off0000df8d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF8D 18208 bytes
SHA-256: 437c45a204270aa14bc452c7556d53fbe72324ab197c3ef8957c0165fa3beef6
font_01_sfnt_off00010f1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F1C 11052 bytes
SHA-256: 715020e289b624b616dabd589994c787f9d95a0dc130170364ad8c8e8ffad6ae
font_02_sfnt_off000128c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1