Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a9844a55a5bbbaf…

MALICIOUS

PDF

80.5 KB Created: 2021-03-19 05:46:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d109b9dd0bedef91bac74db51674f2a7 SHA-1: 204a3d7d4739c85e76dcd9730ad80341f942ac54 SHA-256: 2a9844a55a5bbbaf8821998c50ce4f0039d20bb45806afba30c119914d1fe810
126 Risk Score

Malware Insights

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

This PDF document is classified as malicious, exhibiting characteristics of a phishing lure. It contains numerous external URIs, many hosted on disposable domains, designed to redirect users to potentially harmful content. The presence of a link farm heuristic and the ML classifier's high confidence score indicate a deliberate attempt to exploit user curiosity for malicious purposes. No scripts were extracted, but the document's structure and embedded URLs strongly suggest it's part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/123?utm_term=baahubali+2+tamil+movie++in+isaimini
    • http://kovezemunoropu.iblogger.org/jisodu.pdf
    • http://xariketixagat.mypressonline.com/atharva_veda_in_english_download.pdf
    • http://juvozukatug.66ghz.com/is_safety_net_good.pdf
    • http://xatakafigudu.getenjoyment.net/ribupevituwoxasabewubumed.pdf
    • http://zesigosaf.22web.org/how_to_be_successful_in_life_with_adhd.pdf
    • http://gajelifuluxapov.mywebcommunity.org/tofopefebo.pdf
    • http://sexugaweguko.iblogger.org/10979333459.pdf
    • http://gizovivomiz.getenjoyment.net/whirlpool_wmh53520cs-6_manual.pdf
    • http://fudazozotakaxal.mywebcommunity.org/shanghai_metro_map_2020.pdf
    • http://piwubexugapi.22web.org/genivagiwilanegor.pdf
    • http://kotudekudoges.getenjoyment.net/vepomiwesujorilirasugade.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://xalajagixoba.epizy.com/national_cash_register_repair.pdf
    • http://jisijuvod.myartsonline.com/58862182087.pdf
    • http://vegelupaxusumi.epizy.com/cao_beveiliging_2020.pdf
    • https://uploads.strikinglycdn.com/files/4af1afcc-5728-4849-897c-91bfb1f307e6/fopadubowaselozavatabur.pdf
    • http://jokilezitewoj.epizy.com/accused_1_tamil_movie.pdf
    • https://uploads.strikinglycdn.com/files/8f9950d6-c806-46d5-ad8f-e35a5838de6b/26554863310.pdf
    • http://logiweliziweje.onlinewebshop.net/zotamutalufakar.pdf
    • http://paxiludewajed.epizy.com/investments_bodie_kane_marcus_11th.pdf
    • https://uploads.strikinglycdn.com/files/27500e4c-8c0a-4692-878f-62a95c3e50eb/53058002904.pdf
    • http://limixumijegaf.epizy.com/zurolukurakovig.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d912.bin
5b1f11b219d7d421bbe15d5acb5008f4da2cc36b2cc98be16882ef0dc4157a0e
pdf-font-stream PDF embedded font (sfnt) at offset 0xD912 5092 bytes
font_01_sfnt_off0000ea41.bin
6f36c9523f64358da316e90ef2bdb2791a45bf27d90e245e520c6a89e0d0d8bb
pdf-font-stream PDF embedded font (sfnt) at offset 0xEA41 11284 bytes
font_02_sfnt_off00011120.bin
6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11120 16164 bytes
font_03_sfnt_off00012635.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x12635 4324 bytes