Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab8316fea8cbdfe7…

MALICIOUS

PDF

67.7 KB Created: 2021-05-04 01:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 481f033a5281da78a52528477c6acc79 SHA-1: b799ba8906571babd96541fbac5c6dd3f54399de SHA-256: ab8316fea8cbdfe79f61f555e27565b7b010b090e95306ef701941ce03dea9bf
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains multiple embedded URLs, with the primary one being 'https://ponafet.ru/strik?utm_term=kinematic+equations+of+motion+worksheet', suggesting a phishing or credential harvesting attempt. The PDF structure and embedded content are consistent with a spearphishing attachment designed to redirect users to malicious sites.

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://ponafet.ru/strik?utm_term=kinematic+equations+of+motion+worksheet
    • https://cdn.sqhk.co/nawovoso/BT871ia/basics_of_computer_science_tutorials_point.pdf
    • http://zagafesujed.iblogger.org/how_to_start_an_online_business_uk.pdf
    • https://cdn.sqhk.co/woluzadeviv/kjhmA5S/94965961911.pdf
    • http://raxewapikeb.mygamesonline.org/sazarufej.pdf
    • https://cdn-cms.f-static.net/uploads/4382638/normal_602244e4b3187.pdf
    • http://pakunobun.getenjoyment.net/estilos_de_aprendizaje_visual_auditivo_y_kinestesico.pdf
    • http://wivupivipewezap.mygamesonline.org/3170502438.pdf
    • https://cdn-cms.f-static.net/uploads/4367927/normal_6048669816e05.pdf
    • http://retamos.mygamesonline.org/fejewinakoginominutidi.pdf
    • http://rejorevubirobu.sportsontheweb.net/64010473809.pdf
    • https://cdn.sqhk.co/xupebasolaw/ngghdii/schindler_s_list_theme_piano_sheet.pdf
    • http://sipamuxagiporen.iblogger.org/tom_clancys_jack_ryan_season_2_episode_5_imdb.pdf
    • https://cdn.sqhk.co/dugelabomaw/gf9A7gh/popiwateludiparafi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/zesotat/lekodosipowomiwewabo.pdf
    • https://uploads.strikinglycdn.com/files/1a980dac-42fa-453f-ad87-700eee4a9f64/how_to_teach_elderly.pdf
    • https://uploads.strikinglycdn.com/files/683bfc68-1319-45f5-b29b-ea555de3e3b0/robin_hood_energy_customer_service_0115.pdf
    • https://s3.amazonaws.com/jovekus/panasonic_repair_centre_near_me.pdf
    • https://s3.amazonaws.com/xozeb/tinufosogepe.pdf
    • https://s3.amazonaws.com/sudevejerifu/padufeme.pdf
    • https://s3.amazonaws.com/jixerubowi/nfhs_volleyball_libero_tracking_sheet.pdf
    • http://sirirasefag.rf.gd/mohamed_benchicou.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_off0000cb38.bin
e6dcb3b96f8c2291391e3680c11c57ab32cadcce5d4894f625f8ec12893870ca
pdf-font-stream PDF embedded font (sfnt) at offset 0xCB38 5340 bytes
font_01_sfnt_off0000dd49.bin
24f1cf60241763cc8659d2306280db1d738291babccf9496547a328869bb2254
pdf-font-stream PDF embedded font (sfnt) at offset 0xDD49 10588 bytes