Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3dd6916dece1620…

MALICIOUS

PDF

73.3 KB Created: 2021-02-13 20:50:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: a56fa77882eb96859c0cb1e3a04c222a SHA-1: 190069d85d462e2f9fab4aa8c1938fdfc879411f SHA-256: e3dd6916dece16204351f21488c8c436b928a644b79eeff4cb08b23ef080f4eb
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 or trojan variant. It contains numerous embedded URLs pointing to various domains, many of which are hosted on disposable or link-farm-like services, suggesting a distribution or phishing campaign. The document body, though heavily obfuscated, contains keywords related to 'aws cloudformation template generator', indicating a lure to attract users interested in cloud infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wb?keyword=aws%20cloudformation%20template%20generator PDF link annotation
    • https://jofukesor.weebly.com/uploads/1/3/3/9/133999831/rutaxadedekad-pojabutu-jotukosu.pdfIn PDF document text
    • https://cdn.sqhk.co/kixarozikej/igdTq31/swat_and_zombie_season_2_mod_money.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401714/normal_60159d3fe1dd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478141/normal_6004ff61ed0ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379030/normal_5fdac4ec208a6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427287/normal_600bf612bcae4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376088/normal_5ffe4e7890c26.pdfIn PDF document text
    • https://cdn.sqhk.co/gejupajo/tjioKgh/speak_english_app_full_version_free_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368747/normal_602221c53c4f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476133/normal_5ff3f4b86012b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376611/normal_6016b48dc6d85.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447096/normal_5fffd4a0cd705.pdfIn PDF document text
    • https://cdn.sqhk.co/duzupafuj/hcbagey/arduino_reflex_tester.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/pobixedele/14153092230.pdfIn PDF document text
    • http://nasuxenabo.epizy.com/50775205122.pdfIn PDF document text
    • http://bujisovi.epizy.com/lijaneraxowete.pdfIn PDF document text
    • http://joxumokuri.epizy.com/bureaucratic_reform.pdfIn PDF document text
    • http://datufubizut.rf.gd/nuwijonivovedenidovewimu.pdfIn PDF document text
    • http://mizumefazituko.rf.gd/54307050368.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD25D 5440 bytes
SHA-256: 4caa5be2d30b007d070edcf1de32be88a02f4fc18de6e27effda82562103af55
font_01_sfnt_off0000e4c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4C8 11132 bytes
SHA-256: 6f2fe92169ad53ce12680f26a8c4945fc6211695a5c3514712f7929f70926121
font_02_sfnt_off000109e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109E8 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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