Malicious PDF — malware analysis report

Static analysis result for SHA-256 4afeef21116ce1f9…

MALICIOUS

PDF

124.2 KB Created: 2021-05-01 01:44:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec482d0ad58103dbdaf1024d4871a453 SHA-1: a3140c2d05a5ee15b82038baa20a12765d34e0cc SHA-256: 4afeef21116ce1f9ec85396b0f56f4d4647d3b5bde22069f552f3484ff846a73
96 Risk Score

Malware Insights

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

The PDF file contains embedded URLs that redirect to other PDF files, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery. The presence of external URIs and embedded URLs points towards a spearphishing attachment attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=principios+de+economia+gregory+mankiw+pdf+7+edicion
    • http://teenagetutor.online/terififafeb2ki83.pdf
    • http://itasda.online/jalozaj7k7f.pdf
    • http://difewemizotik.iblogger.org/52309203329.pdf
    • http://mosdendy.store/tp_link_av500_powerline_extender_manuala5n2x.pdf
    • https://wotipufa.weebly.com/uploads/1/3/1/0/131069738/mexisuwe.pdf
    • https://kukuwusak.weebly.com/uploads/1/3/1/3/131379738/46369b15.pdf
    • http://spiritstudio.ru/77964108788p1wvs.pdf
    • http://polanuredun.iblogger.org/excel_vba_find_and_replace_character_in_string.pdf
    • https://cdn-cms.f-static.net/uploads/4387922/normal_602aa27fa1845.pdf
    • http://itawomen.fun/61958890328z0bjt.pdf
    • https://cdn-cms.f-static.net/uploads/4424026/normal_5fda3b1b4d8ef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://mafodagafivuv.epizy.com/warhammer_fantasy_roleplay_4th_edition_download.pdf
    • https://uploads.strikinglycdn.com/files/0e44a487-79cd-4e6b-9ab7-79fe93b028f5/69185733091.pdf
    • https://uploads.strikinglycdn.com/files/c57a8106-d7c9-472c-b688-afb905622fae/21770853035.pdf
    • http://xusoromi.epizy.com/gta_vice_city_game_password.pdf
    • http://guvivel.rf.gd/exemple_d_avant_propos_d_un_rapport_de_stage.pdf
    • https://uploads.strikinglycdn.com/files/e1579b5e-7a05-4239-8fcc-d7e8ee71f732/46825789627.pdf
    • http://jagazasa.epizy.com/what_are_the_5_types_of_hooks.pdf
    • https://uploads.strikinglycdn.com/files/c2a0820c-132b-4e73-ae3a-03b7b62afeb4/snow_white_with_the_red_hair_season_2_episode_10_english_dub_facebook.pdf
    • http://nozuwodapa.epizy.com/puwowinavurilojamoxa.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_off0001a3b0.bin
6310bb3e2bcde5278dfe7aefd93afbef46c968ae98dc943e4d95ea9b9c6e2309
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A3B0 5780 bytes
font_01_sfnt_off0001b771.bin
0edef17ec4028d27a08384c99ac9813f32efe950081b0cda77093cb8359eba28
pdf-font-stream PDF embedded font (sfnt) at offset 0x1B771 12832 bytes