Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a5b195feeabc8ec…

MALICIOUS

PDF

78.2 KB Created: 2021-04-09 09:00:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 614037993e9e264a68eefb2ca27bc5b2 SHA-1: 7a0df4f16215741b212a079295b3fb709e8e4f2e SHA-256: 2a5b195feeabc8ec6a92cbfe15e20947dbf754838ad450c62c963780ac2c62db
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm on disposable hosting, with one URL specifically designed as a redirector. The 'Remote-support tool lure' heuristic suggests the document's content aims to trick users into installing or connecting with remote support software, a common tactic for social engineering attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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://resalured.ru/strik?utm_term=ethical+hacking+meaning+in+gujarati
    • http://tehnikator.ru/the_late_great_planet_earth_downloadfrln3.pdf
    • https://cdn-cms.f-static.net/uploads/4423188/normal_6049c1de1418c.pdf
    • https://naziwimirup.weebly.com/uploads/1/3/4/3/134371197/64b620aebe5de.pdf
    • https://static.s123-cdn-static.com/uploads/4501660/normal_6008de6fcdeac.pdf
    • https://jibigevemur.weebly.com/uploads/1/3/0/8/130873945/4570526.pdf
    • https://vawoxaju.weebly.com/uploads/1/3/1/3/131379227/zomanoje.pdf
    • https://cdn-cms.f-static.net/uploads/4443326/normal_603aa8d3298e8.pdf
    • http://instgramcopyrightdispute.com/431310200080p96b.pdf
    • https://kifosaxuwaf.weebly.com/uploads/1/3/4/0/134016965/3078625.pdf
    • https://favesalaliba.weebly.com/uploads/1/3/1/3/131384568/3ea4859007fdd84.pdf
    • https://cdn.sqhk.co/furugilenu/cKccfZR/vabovitijumajufu.pdf
    • https://cdn-cms.f-static.net/uploads/4447647/normal_6038926ce6586.pdf
    • https://cdn.sqhk.co/mumaxeje/odSqTNS/answers_in_genesis_ark.pdf
    • https://pesowisigafu.weebly.com/uploads/1/3/0/7/130739627/vidoxajole.pdf
    • https://nutomejeti.weebly.com/uploads/1/3/4/7/134702699/4a1a64b155834.pdf
    • https://cdn.sqhk.co/jobasalem/gi8Gjdx/teamviewer_quicksupport_mac_os_x.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.indictrans.org
    • https://uploads.strikinglycdn.com/files/4323cc70-c334-4ae3-aa23-3f81f170abef/75530091489.pdf
    • https://uploads.strikinglycdn.com/files/b05e6da1-6f95-4c87-ae50-a43f0a055e13/kepaj.pdf
    • https://uploads.strikinglycdn.com/files/0fc1c448-9615-4811-bec5-eebeda9365c3/alfreds_basic_piano_library_lesson_book_level_2_free_download.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d417.bin
f10d9509ac017d1f0bf87d0b0d447ea3b601998bf43c8569a126597ee4edd2eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD417 5132 bytes
font_01_sfnt_off0000e56a.bin
8a9012b62abb086b93efe9e56cbcc167528dc7d69ada64d24ddbb021ea92e5ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE56A 10844 bytes
font_02_sfnt_off00010800.bin
f5d86a1fd55e80d3f86653f2014e2d0a751a3aa759e278a497d58aa957191104		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10800 10472 bytes

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