Malicious PDF — malware analysis report

Static analysis result for SHA-256 882f873b77b25d1a…

MALICIOUS

PDF

88.3 KB Created: 2021-04-03 15:20:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 48ad8bd2c35ce33fd724950c17a79f11 SHA-1: 4904a68d4179783acc280fb1dc39b9aa123f55f9 SHA-256: 882f873b77b25d1a09ac47f65118b1d81fd1a143d245fb6f56678e5be641fd58
96 Risk Score

Malware Insights

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

The file is identified as malicious by a ClamAV detection and an ML classifier. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, likely as part of a spearphishing campaign.

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/aws?utm_term=what+is+narrative+structure+in+writing
    • http://tohld.in/how_to_calculate_interest_on_loan_in_nigeriapp4ve.pdf
    • http://wersita.space/larerqlcs2.pdf
    • http://beautysss.site/what_is_the_best_lg_tone_bluetooth_headsetiuw3g.pdf
    • http://ygrash.website/champion_3100w_inverter_generator_with_remote_start_canadazprtc.pdf
    • http://kilesetemopibaf.22web.org/sosalesexewezazosamaz.pdf
    • http://igcopyrightforhelps.com/bukegaja0ch9e.pdf
    • http://xukiwuze.22web.org/55614202787.pdf
    • http://tiktokfrance.fun/579654767763w0n4.pdf
    • http://arenaprobet.com/pigagembt9fa.pdf
    • http://shopwithsale.website/hp_officejet_6500a_plus_ink_replacementnihcc.pdf
    • http://disconto50.pro/the_complete_tales_of_winnie_the_pooh_book13ds9.pdf
    • http://pavawafupef.66ghz.com/jaguars_titans_injury_report.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://xodubepegiluli.rf.gd/hindu_festivals_calendar_2020.pdf
    • https://uploads.strikinglycdn.com/files/d614e193-68a9-4d42-84d1-d3809563bda0/how_to_replace_kenmore_microwave_light_bulb.pdf
    • http://gilikasozomexo.epizy.com/zunuwiwumipibugesededeged.pdf
    • http://ribaxekag.epizy.com/pneumopathie_d_inhalation_traitement.pdf
    • https://uploads.strikinglycdn.com/files/2389fa59-725a-44e8-8616-d4061545d13d/ejemplos_de_monografias_universitarias_peru.pdf
    • https://uploads.strikinglycdn.com/files/8a6a3cb9-3999-4aa2-923c-309b224dd856/the_secret_life_of_pets_3_cast.pdf
    • https://uploads.strikinglycdn.com/files/989def9d-fdb9-4523-bb23-eaca4579bd9b/arris_surfboard_sbg6580_blinking_lights.pdf
    • https://uploads.strikinglycdn.com/files/c31f2fd6-d401-4065-9c14-437b8da190f1/17641991554.pdf
    • https://uploads.strikinglycdn.com/files/97209c58-b23a-48c1-a34e-258b6d7b756e/75756991626.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_off00011d0f.bin
8973604dd93f8be21544f812f34c4da78fe42d8575ae104770daa93b27c1b9c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D0F 5196 bytes
font_01_sfnt_off00012ed5.bin
b68ee42c0756d85211dc3b99181b44c1b9ee1605060e4d442d4c5fb7f865f90c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED5 10740 bytes

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