Malicious PDF — malware analysis report

Static analysis result for SHA-256 80d96677be474707…

MALICIOUS

PDF

96.1 KB Created: 2021-03-17 03:05:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7c8f1d2374e85e39808ccbcbc0d7c9b7 SHA-1: dd119d653c32deba723ea304c278ec7a10fdd0da SHA-256: 80d96677be474707744e1eac94586ad45f5760695d34450bc0f4dfa8ec6631df
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain, identified by ClamAV as a phishing trojan. The document body, though heavily obfuscated, suggests a lure related to educational content, specifically trigonometry worksheets. The presence of external URIs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/wix?keyword=right+triangle+trigonometry+worksheet+answers+with+work
    • http://esagafow.fun/99790778267ksyo3.pdf
    • http://eroganoficial.site/24715675766af9v6.pdf
    • https://cdn.sqhk.co/tanusulirava/uM4Q2gf/fun_color_snakes_fireworks.pdf
    • https://cdn.sqhk.co/desogepupema/hgjEnhe/40587698051.pdf
    • https://cdn.sqhk.co/vunalogivefu/jg6n9ij/end_of_days_vinnie_paz_meaning.pdf
    • http://tersq.space/an_introduction_to_marine_mammal_biology_and_conservation_textbooktpqxn.pdf
    • http://bcpzonasegurape2-viabcp.com/best_cheap_double_jogging_strolleri3mcq.pdf
    • http://gitipakivo.iblogger.org/adventure_quest_worlds_hack.pdf
    • http://zugemenelil.medianewsonline.com/gomigozejudu.pdf
    • http://spain50off.info/do_portable_dab_radios_work_in_carsolxce.pdf
    • http://how2clever.com/photosynthesis_virtual_lab_answer_kezdzb1.pdf
    • http://tasuvelimu.22web.org/nasatumulefabasil.pdf
    • http://jadogaxarabu.mygamesonline.org/vaxatudironibatojinigo.pdf
    • http://tabikola.online/zabamukolumakanela8g1qi.pdf
    • http://suziterunedoloj.sportsontheweb.net/rasam.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/fd621d38-164b-467b-96c2-78b9c2388706/how_to_know_if_the_sweet_potato_roots_ready_to_harvest.pdf
    • http://sajumapudetuji.rf.gd/omron_hem-711_parts.pdf
    • http://rupesujutiwu.myartsonline.com/67450523073.pdf
    • http://zikenonuto.epizy.com/canciones_infantiles_acordes_guitarra.pdf
    • https://uploads.strikinglycdn.com/files/b8581f15-8bcc-4401-b618-2034c9bf14ae/xegolawu.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_off00012ffe.bin
a17885b4fd577e0298a64705d5055d2ac7c2363fd7008e9cf236b3df412a17d8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12FFE 2828 bytes
font_01_sfnt_off000139f8.bin
d90d7acc15141c1ebd26777715ae2372ddecbc515c467cd0cfe39e5b0070beb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x139F8 5364 bytes
font_02_sfnt_off00014c28.bin
1b6dea94f0217c1cef85dc367a4ef41114782ce3be3369e5c73023d2eeb0e9d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14C28 10504 bytes

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