Malicious PDF — malware analysis report

Static analysis result for SHA-256 96bfe41266c175c6…

MALICIOUS

PDF

86.9 KB Created: 2021-03-27 21:27:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d724bd7fbc61e9f504fd4fe6b6bf0347 SHA-1: ec72aa3be214f6dafa1b3383f13c96e72bf83394 SHA-256: 96bfe41266c175c6acfb739acf9275d333c07ea00cf6b4403ff17ad887df2ba4
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'druttle.ru', suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to historical topics, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=who+was+involved+in+the+second+triumvirate PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470679/normal_5fff83afca992.pdfIn PDF document text
    • http://paksorond.xyz/jikepojdt6.pdfIn PDF document text
    • http://velesvoyage.ru/kodorigimivopy4jzi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449177/normal_602e30e4815da.pdfIn PDF document text
    • http://antonioit.fun/67503631741h7sw7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366344/normal_60316aa35698e.pdfIn PDF document text
    • https://cdn.sqhk.co/powirafawume/thbhh22/49211997592.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/ezgggjf/lumenelexidowutat.pdfIn PDF document text
    • http://fresh-ita.space/cube_testing_formulaqojja.pdfIn PDF document text
    • https://cdn.sqhk.co/lisupixiwe/RjjTiAN/95198650446.pdfIn PDF document text
    • http://republvinb.fun/81101525603lvfiq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403951/normal_6039b540cf83b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378167/normal_605a6f39ce648.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://536432c6-7160-4795-b32c-faef63afc1c8.filesusr.com/ugd/5e2347_8b209735ee97450b9427f440ca45c487.pdf?index=trueIn PDF document text
    • https://2f60c0de-bae8-48d8-8f3f-ce7907f87c52.filesusr.com/ugd/badafb_61c7d2e25c1a43c0bd2b11ee25a52345.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/maytag_centennial_dryer_heating_element_test.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/26b12881-9260-4c7f-a899-ac6bd5045dbe/puxejuzosubazekebabo.pdfIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/chamatkar_movie_720p.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a67a3a1-f11d-4548-9dac-6dc9beb33ad0/nosufiredisurekururidew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/65b1681b-0fa8-442e-9af6-0f599b4bbcff/lozitaxeraruxidiwil.pdfIn PDF document text
    • https://3745348a-78a0-42d7-8ff4-af2b45bf5faf.filesusr.com/ugd/02631b_2a6e0741f0e4431286729d6dfeb7a4b5.pdf?index=trueIn 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_off000115cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115CF 5344 bytes
SHA-256: a0e63bb2f59e30cd847805ca9ccd04676b802b96ca2f8e42ea59434c814fee19
font_01_sfnt_off000127eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x127EB 11304 bytes
SHA-256: 75d814ced7720cf61af4d10b5dccba499355abeab436b1dc7c4d0cae13567902

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