Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f121d3c1199d878…

MALICIOUS

PDF

92.6 KB Created: 2021-03-01 15:21:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: e3aa80361662b76a1cafe0058123ce5c SHA-1: 97bb3923c8174642d0c0e65a39a45f25b1a8185c SHA-256: 7f121d3c1199d87826090ec323838acdf170a5e36a68de43b5b0fe770c757243
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The sample is a PDF document that exhibits characteristics of a phishing attack, as indicated by the 'Fake CAPTCHA' heuristic. It contains an external URI pointing to a URL that appears to be part of a lure, potentially to trick users into downloading further malicious content or providing sensitive information. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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://gimoguvi.ru/wb?keyword=pigtronix%20infinity%20looper%20pedal%20review PDF link annotation
    • https://cdn.sqhk.co/ketalidukepi/idhfpig/62148625055.pdfIn PDF document text
    • https://cdn.sqhk.co/mopewedote/heiGij4/lufumebivezamolopef.pdfIn PDF document text
    • https://cdn.sqhk.co/rusefijow/ahhFifu/combat_quest_archer_action_rpg_ps4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385424/normal_6014514282387.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/cjehbjc/the_zombies_are_coming_meme.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471091/normal_60243c3854716.pdfIn PDF document text
    • https://cdn.sqhk.co/xedaberetaj/jcof4W8/among_us_unblocked_games_69.pdfIn PDF document text
    • https://cdn.sqhk.co/netesatova/C0QjdOK/thomas_wooden_railway_drawbridge.pdfIn PDF document text
    • https://cdn.sqhk.co/muluxodipoto/hbjcygh/86680937861.pdfIn PDF document text
    • https://cdn.sqhk.co/daxegajok/dIpRhjs/live_tv_channels_online_free_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463262/normal_5fda79e2aca5e.pdfIn PDF document text
    • https://cdn.sqhk.co/poladejug/hDEUgg2/horror_skins_for_minecraft_pc_bedrock.pdfIn PDF document text
    • https://cdn.sqhk.co/runudori/cud7Hhg/rupowezufatebi.pdfIn PDF document text
    • https://cdn.sqhk.co/jinavefajevo/gifhjhg/gold_farming_osrs.pdfIn PDF document text
    • https://cdn.sqhk.co/suxujaba/gdQyhgK/horizon_nj_health_dental_provider_directory.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467306/normal_602821d182023.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501364/normal_5fe04a8bbfa60.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D33 5352 bytes
SHA-256: 86f805abe5f030e191cba190df5163bf3ebb8e557baa184484aefbb337457233
font_01_sfnt_off00013f9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F9C 11040 bytes
SHA-256: 212f395868c7444d0d8fadf36f961afecbc0f9f9e981f07df85c418449112f83

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