Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac85120cd03d1a1e…

MALICIOUS

PDF

78.6 KB Created: 2021-03-22 21:17:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 02c8484bc6f178128940513259fa3dc7 SHA-1: c0285e97434eaf4235915c0990f4bb750e1993ff SHA-256: ac85120cd03d1a1e7a58b3f63d848da9efe3f2fb12742c18cc7ff3a3a4225e36
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by both ML classification and ClamAV, specifically as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, forming a link farm designed to redirect users to potentially malicious content. The primary URL observed is https://mezovuduw.ru/wix?keyword=naruto+team+8+tv+tropes, suggesting a lure related to search engine optimization or keyword targeting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/wix?keyword=naruto+team+8+tv+tropes PDF link annotation
    • http://dipunag.getenjoyment.net/morimezapajikutusorek.pdfIn PDF document text
    • http://nelilovodik.scienceontheweb.net/zekekujifojifobewijifare.pdfIn PDF document text
    • https://kofagegupuk.weebly.com/uploads/1/3/2/3/132302723/0de5626377b3.pdfIn PDF document text
    • https://razivizufizide.weebly.com/uploads/1/3/4/5/134525322/3d2b38.pdfIn PDF document text
    • https://vurusewotuludi.weebly.com/uploads/1/3/0/7/130739344/b3c72824.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://254b3b0b-79dc-4992-827c-fd4bb3db3178.filesusr.com/ugd/f515ca_9c37906486cc4cd78f606b65e4b82e70.pdf?index=trueIn PDF document text
    • https://f867c6cd-7aae-4938-a634-6821dcb48262.filesusr.com/ugd/eb45fa_297fd3a8b0ab4836b8824df43336d958.pdf?index=trueIn PDF document text
    • http://jabodegodonirad.atwebpages.com/quais_so_os_tipos_de_artes_plsticas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30448ee7-008c-4d45-a40f-d55e33f547b9/tafinexadujirixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e06e952b-0699-4a1d-990c-680c027794eb/19538862048.pdfIn PDF document text
    • https://52f9d6e5-2fd5-4906-a030-4d12f703b62a.filesusr.com/ugd/297ecd_4e255e75937745c28dd1d51965266d54.pdf?index=trueIn PDF document text
    • https://08b4a39d-fa16-4eaa-91be-ae90003cacb9.filesusr.com/ugd/237bf7_c254e2d11d5e43edb47d9e9955f19c84.pdf?index=trueIn PDF document text
    • https://d17f4099-ecc1-42b1-9c73-51521793457c.filesusr.com/ugd/4a2613_7385d464de02432f98c301fb1dc21ba8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wupagivoz/60480799325.pdfIn PDF document text
    • https://s3.amazonaws.com/wivunonovef/11347381188.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f379.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF379 5156 bytes
SHA-256: 54970da7ae7ba99717a9c25f43b3d46e6d576a2587e2d5087eea77bb0cb81bb5
font_01_sfnt_off000104f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104F7 11692 bytes
SHA-256: 13512cb9e7154c20af7d614d1031bb2d42ec1fe327c2f8db3552687cf0ece5a0

Open this report in the interactive analyzer, or submit your own file for analysis.