Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fcabc42ee352c38…

MALICIOUS

PDF

77.9 KB Created: 2021-04-15 20:41:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 404606bd3ac6fabf4f04ed4c7ffc196b SHA-1: b63cd50102754615f678bed96be80fb0747f90c5 SHA-256: 4fcabc42ee352c3816fc861c8d8762614ee63b3834226629ee3a7f5e0bf7002d
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that, when clicked, leads to a phishing site. The document body, though heavily obfuscated, appears to be related to printer troubleshooting, suggesting a lure to trick users into clicking the malicious link. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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=hp+laserjet+p2015+manual+troubleshooting
    • https://cdn.sqhk.co/zikonidenijo/jc36xKQ/chicken_invaders_5_full_apk.pdf
    • https://cdn.sqhk.co/vopokemib/nPidztq/13965695311.pdf
    • https://cdn.sqhk.co/luwivimexu/j4giKhj/assembly_line_production_worker.pdf
    • https://cdn.sqhk.co/zavilisuga/kgjieGZ/75692684906.pdf
    • https://cdn.sqhk.co/takularozo/chhdRph/furniture_mod_for_minecraft_1._16._40.pdf
    • https://cdn.sqhk.co/satofurijob/MIieJnI/13810465388.pdf
    • http://wipababotuzuke.iblogger.org/current_affairs_2019_in_marathi_with_answers.pdf
    • http://sanaletetifon.iblogger.org/76198225199.pdf
    • https://cdn.sqhk.co/gubisagebuto/gegMhhf/75459606669.pdf
    • http://gipawavanitexe.22web.org/dupifozixedimepoxa.pdf
    • https://cdn.sqhk.co/ragonujip/ieghajb/81713556761.pdf
    • https://cdn.sqhk.co/sekigizakeku/jhJfMcV/wosevi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f8864453-fb54-400a-a691-864477302d6e/59352472156.pdf
    • https://s3.amazonaws.com/fovezewi/sipatowagadaxi.pdf
    • https://s3.amazonaws.com/vetamedisoz/7683303699.pdf
    • https://uploads.strikinglycdn.com/files/bac30f67-7f7e-4d0d-82d1-ba14e438a4f8/mtg_plane_shift_eldraine.pdf
    • https://uploads.strikinglycdn.com/files/f41451d9-3fae-4de8-bd32-09b88a031992/why_is_my_electric_furnace_not_shutting_off.pdf
    • http://rowavironipomiz.epizy.com/acute_respiratory_distress_syndrome_nejm.pdf
    • https://uploads.strikinglycdn.com/files/903faadf-231a-4438-aee0-8bcf4980f626/pathfinder_2e_dm_screen.pdf
    • https://s3.amazonaws.com/poresi/how_to_reset_netgear_extender_wn3000rpv3.pdf
    • https://s3.amazonaws.com/lorifumofelu/nintendo_ds_lite_charger_and_stylus.pdf
    • https://uploads.strikinglycdn.com/files/61cd2054-1bbe-4f58-831b-51d7742f91a6/medieval_2_total_war_mods_nexus.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_off0000f0a8.bin
efc4652e5f5065bb01bb1946bee8d9e84a6707f02161769c583a4426c0c7ea01
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A8 5860 bytes
font_01_sfnt_off0001046f.bin
b421364997cc67a2fc12f5278a4790d03ea1f36e74d9cf72e75025c800d7c0a8
pdf-font-stream PDF embedded font (sfnt) at offset 0x1046F 10912 bytes