Malicious PDF — malware analysis report

Static analysis result for SHA-256 36019d3d6a71f8ef…

MALICIOUS

PDF

70.5 KB Created: 2021-03-28 22:41:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 03ee145a6b19fb1b76a1decc4c6b91b3 SHA-1: f69891dbc4a275ea376c269c6bda43bea1174624 SHA-256: 36019d3d6a71f8ef1724f7ff95e9e1228ceae39f88d1ba6728310f31443964f0
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier indicating maliciousness. The embedded URLs, such as 'https://fokemale.ru/123?utm_term=half+quarter+and+three+quarters+worksheet', suggest a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a large number of links pointing to disposable hosting, reinforcing the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/123?utm_term=half+quarter+and+three+quarters+worksheet PDF link annotation
    • http://jekebes.iblogger.org/emotional_songs_pagalworld.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387811/normal_5fde3b77950cf.pdfIn PDF document text
    • https://sazulolako.weebly.com/uploads/1/3/1/4/131453808/latunoresi.pdfIn PDF document text
    • https://gudivolopuna.weebly.com/uploads/1/3/5/3/135346868/visafoxagu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370561/normal_605908956c3dc.pdfIn PDF document text
    • https://tovamegudisolos.weebly.com/uploads/1/3/1/4/131411857/a484f1768.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385424/normal_6042efa8937c2.pdfIn PDF document text
    • http://chisto-chisto52.ru/us_army_special_forces_sniper_schoolqgwjp.pdfIn PDF document text
    • https://wofinomedek.weebly.com/uploads/1/3/4/1/134108675/jefokaren-woxikokoti-dakaxiwi.pdfIn PDF document text
    • http://watarutab.22web.org/carcinoma_de_celulas_escamosas_felinos.pdfIn PDF document text
    • http://bit7.top/28661268403i1dqr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426063/normal_6026d37cb26e8.pdfIn PDF document text
    • https://milorupubi.weebly.com/uploads/1/3/4/3/134317418/f5943cfb5214f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4504791/normal_601a19896364c.pdfIn PDF document text
    • http://naruxavofel.22web.org/23159470982.pdfIn PDF document text
    • http://redtea.space/15860170083fpry9.pdfIn PDF document text
    • http://helpcontactform.com/petigawu9ult.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jowanesivokadeb.rf.gd/financial_statement_template_xls.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/616b6deb-450b-47e9-a307-92bf31e3e49c/lexuzikajek.pdfIn PDF document text
    • http://neropexuzex.rf.gd/xivoj.pdfIn PDF document text
    • http://xaxefoz.epizy.com/xolimufi.pdfIn PDF document text
    • http://kogisovaf.epizy.com/vawawatozajasa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb3e9249-531b-44a3-b1c1-9a0fed1835e0/ruxiduju.pdfIn PDF document text
    • http://tugupora.epizy.com/data_warehousing_fundamentals_for_it_professionals.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_off0000d6c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6C4 5240 bytes
SHA-256: ce395474273bf81846dffc8ccae8821b064aa130f435259ff0f82539e43eb750
font_01_sfnt_off0000e89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89D 10524 bytes
SHA-256: 7955486887b7c266fb40f663f67de5d296474c418840fea7c04b14d03205351e

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