Malicious PDF — malware analysis report

Static analysis result for SHA-256 0312b07b0201aec9…

MALICIOUS

PDF

99.6 KB Created: 2021-03-26 07:39:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 1daeaa7c6d4044701ed6d004b26178a0 SHA-1: 7dd5d2921816ff971f1d2ef220648f5f6c02c5c7 SHA-256: 0312b07b0201aec9e42f677e78f0f29eb606b9d3ba5e7e21b691efd8e1668b15
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, including one pointing to 'fokemale.ru', which is characteristic of phishing or malware distribution schemes. The PDF structure suggests it functions as a link farm, directing users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://fokemale.ru/wix?keyword=decapped+ls+injectors PDF link annotation
    • http://piwakere.iblogger.org/vagituvuwoxixobevaroxido.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460471/normal_604d91bcd11be.pdfIn PDF document text
    • https://mapaluloxusogor.weebly.com/uploads/1/3/0/7/130739646/pumiduxejagaze_noduzabapo_jimed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497372/normal_6055ff369926c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486206/normal_5fc9314aadd0c.pdfIn PDF document text
    • https://bevazemirif.weebly.com/uploads/1/3/4/8/134873662/bapitisubilisi_zilemanos_xelitesuzap_banumovup.pdfIn PDF document text
    • http://sefobadivura.iblogger.org/25089327598.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389581/normal_602c4c153891a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wutogugej/4774523606.pdfIn PDF document text
    • https://fb1cd387-549b-40f1-a5a4-67fd65d29bb3.filesusr.com/ugd/4200b4_abe67ee28520414c9d6b41fbdd5e5d1e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f378926-ec1b-4623-b665-21fd9f2688c8/92489227376.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da965663-98b9-4b59-bb73-a4a40cf1e762/65099766848.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/261dcd6d-66ab-411c-b690-0a28baff7c4b/saderuxalo.pdfIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_6c8b74f14f5543e1b5dfc5fb007850d3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8b1d6fe-2241-4143-a852-b444df1bf792/car_raffles_in_california.pdfIn PDF document text
    • https://39c3e2ba-dcb8-4bc0-9ed7-0058f02c59d5.filesusr.com/ugd/fd4c29_53c2f2659db84b5fb81c39ce02beb373.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/petubapizo/status_asthmaticus_management_nice_guidelines.pdfIn PDF document text
    • http://kokelegamud.epizy.com/nivis.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_off0001478c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1478C 5144 bytes
SHA-256: 61dedcf1f130d76d8882e82db13194276fe7c8d921e5b223402bfd3da65cae39
font_01_sfnt_off00015920.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15920 11976 bytes
SHA-256: ca82e0f9bbe83da9929b8cbda07b235399d709811749553572393ed882398d5e

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