Malicious PDF — malware analysis report

Static analysis result for SHA-256 66758406fa5e7410…

MALICIOUS

PDF

76.1 KB Created: 2021-03-09 08:42:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c5e36c24a9b96c81472a76eab71b58bc SHA-1: e1a6b486c55d3fcc60318070c406ca1f1f6d15a5 SHA-256: 66758406fa5e7410e0ba3febd5c9d20a707d449d6d34130e0ec1deb17dd5d44b
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were explicitly extracted, the presence of external URIs and the overall classification suggest the document is designed to redirect users to malicious content, likely a phishing page or a download site.

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://kuzutuzo.ru/strik?utm_term=high+tech+high+school+ranking
    • http://christinaanddavid2019.com/33746662702d7qa7.pdf
    • https://static.s123-cdn-static.com/uploads/4409826/normal_5ffb16eecde3e.pdf
    • https://static.s123-cdn-static.com/uploads/4393763/normal_5fe06fc165752.pdf
    • https://cdn.sqhk.co/nixivezez/h5hjSNo/21513380513.pdf
    • https://cdn.sqhk.co/lokiwejawe/heickjh/ufc_254_uk_time.pdf
    • https://static.s123-cdn-static.com/uploads/4459062/normal_5fde4d7d310ed.pdf
    • http://detonicro.website/main_door_design_catalogueh2kfr.pdf
    • http://topepuxabi.iblogger.org/micromax_android_one_not_booting.pdf
    • http://antileqphh.site/zarizemfg94c.pdf
    • http://zikuwojanubeg.iblogger.org/68123972957.pdf
    • http://xobapadu.iblogger.org/batman_a_death_in_the_family_movie_wiki.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bede11c3-52a7-4f48-8122-e6f14af7d9f4/lolizowamixobo.pdf
    • https://uploads.strikinglycdn.com/files/67b25085-7295-462f-a99c-5e6ea2dfd1f2/how_to_clean_glacier_bay_water_dispenser_bottom_load.pdf
    • https://s3.amazonaws.com/viwoxuz/ropabogijoresawufopepo.pdf
    • https://s3.amazonaws.com/paxivogedewilu/fuwubarunafefuxot.pdf
    • https://s3.amazonaws.com/zifozujiwi/17022338341.pdf
    • https://s3.amazonaws.com/bizamesuwepe/blazor_webassembly_template.pdf
    • http://lemizirimafon.epizy.com/1153450195.pdf
    • https://uploads.strikinglycdn.com/files/f028f7b6-698e-4d76-91fc-17bfc35b4f12/nawozufojabobuxexakobaxid.pdf
    • http://jitapalerex.rf.gd/english_action_movies_2017_full_movie.pdf
    • https://uploads.strikinglycdn.com/files/ce0d2b13-852b-4902-9cad-6f0654af9e19/itil_service_operation_definition.pdf
    • https://uploads.strikinglycdn.com/files/c4722e50-9c84-441f-879d-739c19ed262b/rininemoliwadufadilozorix.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_off0000ec0f.bin
119001bb06955018b6108f4755a42c4385cafeab4ba2929f3738e031d60ca5bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC0F 5088 bytes
font_01_sfnt_off0000fd58.bin
a8a0d3a0bb07ddbd78c06c39864f3cb605baae4a1046217dee8664393dc71df1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD58 11028 bytes

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