Malicious PDF — malware analysis report

Static analysis result for SHA-256 b62981b8fec9daf6…

MALICIOUS

PDF

74.9 KB Created: 2021-04-06 17:15:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7d61904112855daa8391908a5dcb65e SHA-1: 820b519d5a6319e498f00c62f7d5c45113c04812 SHA-256: b62981b8fec9daf6092c2520fdf3f7f60a417a0465709b4d0080be1d3416bf70
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though partially corrupted, suggests a lure related to 'Accidentes de trabajo y enfermedades profesionales'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jumiwimov.ru/award?keyword=accidentes+de+trabajo+y+enfermedades+profesionales+pdf
    • http://pozijuza.scienceontheweb.net/can_my_baby_camera_be_hacked.pdf
    • https://cdn-cms.f-static.net/uploads/4465125/normal_602786a731c5b.pdf
    • https://cdn.sqhk.co/jeporikate/bigieic/kovebojigerawiwunusoma.pdf
    • http://kofojoxake.mygamesonline.org/xakosaf.pdf
    • http://lunowizu.iblogger.org/lagu_biri_biri_upin_ipin.pdf
    • https://cdn.sqhk.co/wexapitode/5uLigji/mobile_game_for_fall_guys_ultimate_knockout_pc.pdf
    • https://cdn-cms.f-static.net/uploads/4492555/normal_6018ab42136d8.pdf
    • https://cdn.sqhk.co/kuwusemob/CeW8Yie/rimidozilitimonofitiga.pdf
    • https://cdn-cms.f-static.net/uploads/4409421/normal_604e57956e1b8.pdf
    • https://cdn-cms.f-static.net/uploads/4402261/normal_60244884af734.pdf
    • https://static.s123-cdn-static.com/uploads/4373502/normal_5ff33a0545d09.pdf
    • https://cdn.sqhk.co/dakuwuwuzije/ejggfgi/roosevelt_for_freedom_speech.pdf
    • https://cdn.sqhk.co/pebekaja/jht5jb0/wagozatud.pdf
    • https://cdn-cms.f-static.net/uploads/4366405/normal_605a4255978cd.pdf
    • https://cdn-cms.f-static.net/uploads/4393485/normal_6054754017d7b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/514f6932-701c-4381-81f4-2234cd9c620e/driver_hp_designjet_500_plus_24_windows_10_64_bit.pdf
    • http://wojuzixe.epizy.com/guide_des_habitudes_de_travail.pdf
    • http://desasivitusuzux.epizy.com/atomic_structure_chemistry.pdf
    • https://uploads.strikinglycdn.com/files/515b11f1-548a-496d-ac42-95b33d781ad2/how_many_carbs_in_keto_diet_reddit.pdf
    • https://uploads.strikinglycdn.com/files/2ab9d7d6-72da-499d-b08b-ba099b872225/mitsubishi_mr_slim_nest_thermostat.pdf
    • http://kawerulim.onlinewebshop.net/povivuwagatekogutojazoz.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_off0000e34d.bin
749475bc17d2e1b791666519d45fde9ee6f119b828edda6f380f6b808127af2d
pdf-font-stream PDF embedded font (sfnt) at offset 0xE34D 5608 bytes
font_01_sfnt_off0000f653.bin
6aaec0fafc7368010d1d4bf257829a46a89c546c5065173aa08efd1bfc77d45a
pdf-font-stream PDF embedded font (sfnt) at offset 0xF653 11488 bytes