Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b991f6112fa1198…

MALICIOUS

PDF

78.5 KB Created: 2021-04-23 01:47:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 140232a427d3dfd00e56882e4805963c SHA-1: b96600b2e1c71f74c63d4bfcbe654006eafa49ea SHA-256: 4b991f6112fa1198aaeeff1fb5a17922b1aee40f86d96748dd5e5e4933be142d
96 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for an external URI pointing to a suspicious domain, likely intended for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the presence of an embedded URL suggests an attempt to redirect the user to a malicious site, possibly disguised as a fix for a common software issue.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9967

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://dafemum.ru/strik?utm_term=foxit+reader+pdf+printer+not+working
    • http://dajexori.mypressonline.com/what_is_the_history_of_the_sweet_potatoes.pdf
    • http://mscgis.net/59784033741o32g4.pdf
    • http://alkim.xyz/dd_3.5_monster_manual_5k4crd.pdf
    • http://legexebe.medianewsonline.com/vokodixolepenose.pdf
    • http://kefets.xyz/rawobefigujegabiwuylzl6.pdf
    • http://idealica-it.website/socratic_questioning_definition77s38.pdf
    • http://sbrf.link/287931524155hewm.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/41df9852-c1f7-404b-8493-c990ea14daaa/master_of_the_universe_fanfiction_download.pdf
    • https://s3.amazonaws.com/dugibabafod/kexifilulopezin.pdf
    • https://uploads.strikinglycdn.com/files/71c7df7f-af30-47bb-bdba-949974ff5cf6/48681001727.pdf
    • https://s3.amazonaws.com/bidurudilidujug/the_rock_cycle_worksheet_7th_grade.pdf
    • http://fabonek.rf.gd/70440219266.pdf
    • http://jetotajasavesi.atwebpages.com/pdf_to_word_converter_download_for_free.pdf
    • http://muvalinifotu.rf.gd/18598100015.pdf
    • http://nunavaxukozu.onlinewebshop.net/gujelomaleruxenufufonex.pdf
    • https://s3.amazonaws.com/debiwelof/sutefekenilelikiz.pdf
    • https://s3.amazonaws.com/paxuvagal/how_do_you_reset_the_srs_airbag_light.pdf
    • https://uploads.strikinglycdn.com/files/91c28426-74ee-4d3a-acc7-9a3c9fd90fd0/interior_design_diploma_online_australia.pdf
    • https://uploads.strikinglycdn.com/files/5c4aa5ba-d186-4234-8678-8c86592cd79b/17288674508.pdf
    • https://s3.amazonaws.com/muxozuvalubi/menabosaga.pdf
    • http://wodowepakimeko.onlinewebshop.net/vizixakurase.pdf
    • http://rupilozomu.epizy.com/86111948818.pdf
    • https://uploads.strikinglycdn.com/files/f7eea0fb-314e-40dc-b8a9-ef678f1dcf07/how_to_reset_moultrie_mlb_800i_security_code.pdf
    • https://uploads.strikinglycdn.com/files/cc24363c-4a15-47d7-a15b-b229ec386b2d/96700039771.pdf
    • https://uploads.strikinglycdn.com/files/1336b494-c434-41a8-810c-77854a793dcb/cundo_es_el_da_de_la_madre.pdf
    • https://uploads.strikinglycdn.com/files/f5b4098c-9f29-4a8a-b2b7-8f609f2e05cf/jomowozofodag.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_off0000f39e.bin
7cff5f269f5f7b2938cd308cb1beba31a43cac938fa3541f20f7592edb977c2b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF39E 5176 bytes
font_01_sfnt_off00010571.bin
66db3d0198de5ec99ae23972f196f8e705522a0a2cae385cf931ec120524ff8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10571 11576 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.