Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fa456b74a39e4c0…

MALICIOUS

PDF

77.6 KB Created: 2021-03-22 14:46:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: da1003cc0169b58023ec880afdcb519f SHA-1: 20a714b062e1b524fbf9387101f1a538a88bac4b SHA-256: 6fa456b74a39e4c019dce4648ba13bff2ae6924e30cb2266b8f5432222e2db09
96 Risk Score

Malware Insights

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

The file is a PDF document that contains embedded links, one of which points to a suspicious domain associated with phishing. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, suggests a lure related to brain function, likely to trick users into clicking the malicious link.

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://zajinet.ru/strik?utm_term=does+the+left+side+of+your+brain+control
    • https://cdn-cms.f-static.net/uploads/4477878/normal_604b36edad12e.pdf
    • https://cdn.sqhk.co/wixexozesila/5WuAKHU/child_care_resources_birmingham.pdf
    • https://cdn.sqhk.co/dikapagoloza/ijjjijd/fidget_hand_spinner_simulator_online.pdf
    • http://vnds-super.space/2037982870r5wb.pdf
    • http://tryraisins.pro/how_to_understand_maths_very_wellb42qi.pdf
    • http://leyloften.online/rififubizinukewukubanolek04a0e.pdf
    • http://tekplafond.xyz/raginezunidokijimetizexaulxbb.pdf
    • https://cdn.sqhk.co/madufuxenuw/Djaxuhj/phoenix_suns_rumors_2020.pdf
    • http://hotgirls.host/jawudimazuxfwxsj.pdf
    • http://lnstagram-copyright-confirms.com/ge_adora_french_door_refrigerator_water_filter9616e.pdf
    • https://cdn.sqhk.co/gelowidabik/wgh9Lhe/544349728.pdf
    • https://static.s123-cdn-static.com/uploads/4486552/normal_5ffaa1215662a.pdf
    • http://trysol.xyz/why_was_perseus_sent_to_kill_medusahdmpn.pdf
    • https://cdn-cms.f-static.net/uploads/4455657/normal_6013267866f42.pdf
    • http://bigowet.xyz/492106692k2xyg.pdf
    • http://olipaka.xyz/54727227467pd26e.pdf
    • http://online-bestshop.xyz/68081860219ddefd.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/kukupunopedon/baskerville_std_roman_free.pdf
    • https://s3.amazonaws.com/tipikaxe/propanoate_de_mthyle_formule_dveloppe.pdf
    • https://s3.amazonaws.com/pafexegud/gagunasunilelubasoxe.pdf
    • https://s3.amazonaws.com/wobuzisibal/define_what_is_meant_by_the_half-life_of_a_radioactive_isotope.pdf
    • https://s3.amazonaws.com/paxuvagal/fogobifagopajuwejo.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_off0000f20f.bin
006dfe3c125d6532f7e51c347a8492816cdb363d45df0b3c671d1969f4829213
pdf-font-stream PDF embedded font (sfnt) at offset 0xF20F 5352 bytes
font_01_sfnt_off00010445.bin
a1a01f7cc1ccefb3a82ca73178e03c2f39e141c54f91f9e864025696f2a7f35d
pdf-font-stream PDF embedded font (sfnt) at offset 0x10445 10736 bytes