Malicious PDF — malware analysis report

Static analysis result for SHA-256 a902af19a136191f…

MALICIOUS

PDF

106.8 KB Created: 2021-03-15 17:58:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8ed5574936b8bb985ce696fab224f70b SHA-1: 1957a264b353b9eb9e7b0cd8c7670b9e3be4eeaf SHA-256: a902af19a136191fc4557558e2e009024fba7379613fb69525d3fdfd8e23fa5c
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing lures. While no scripts were explicitly extracted, the presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/123?utm_term=formal+definition+of+omnipotence
    • https://cdn-cms.f-static.net/uploads/4366063/normal_601bb33675710.pdf
    • https://static.s123-cdn-static.com/uploads/4445544/normal_5ff30d49ce2b4.pdf
    • http://tanubujurutemut.scienceontheweb.net/tujas.pdf
    • http://lofoporubatul.mygamesonline.org/jedatobatevuxutojug.pdf
    • https://cdn-cms.f-static.net/uploads/4451356/normal_60122671b1c03.pdf
    • https://ziduxaxeg.weebly.com/uploads/1/3/1/3/131380546/3799107.pdf
    • https://cdn-cms.f-static.net/uploads/4461525/normal_604f11f4d0824.pdf
    • http://zenaxudoriw.mypressonline.com/13723818195.pdf
    • https://cdn.sqhk.co/fisoxinizo/jghiifH/409874756.pdf
    • http://kixiwogazu.sportsontheweb.net/the_hunger_games_catching_fire_full_movie_free_online.pdf
    • https://cdn.sqhk.co/sozovoja/4jffX30/kuvimutorezedonizi.pdf
    • http://vumexovuvelafe.medianewsonline.com/sabonetitepexukivaj.pdf
    • https://static.s123-cdn-static.com/uploads/4420906/normal_5ffb57c94e63e.pdf
    • https://zesidorav.weebly.com/uploads/1/3/1/4/131437831/9638875.pdf
    • https://cdn.sqhk.co/letabuner/hcxjeNc/bigo_live_app_download.pdf
    • https://static.s123-cdn-static.com/uploads/4392651/normal_5fce9e7b79eac.pdf
    • https://cdn-cms.f-static.net/uploads/4374536/normal_5fdc38b0bb63f.pdf
    • https://puxalumanog.weebly.com/uploads/1/3/4/6/134648941/pujodekawuze.pdf
    • http://rujitexoxobag.mypressonline.com/97133408800.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://kojenixerog.myartsonline.com/do_you_still_get_paid_for_leave_of_absence.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000162de.bin
08eac1931c131c094851b2a4b911cfd4b79bcb14db19cc4272e28079e4e6d4ce
pdf-font-stream PDF embedded font (sfnt) at offset 0x162DE 5080 bytes
font_01_sfnt_off00017411.bin
12d58d3840fe256b327ed53acd38d3f301eedb4b73c46e12a67b7831eb3ec976
pdf-font-stream PDF embedded font (sfnt) at offset 0x17411 11880 bytes