Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e1e2f3908196e07…

MALICIOUS

PDF

81.7 KB Created: 2021-04-06 11:49:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f85ef2fed0748c35be64494220eb3637 SHA-1: 20c07fb1a890090561dd37bf3fbc3c01ba783d86 SHA-256: 1e1e2f3908196e079559c246316cd9b0756bba44aa9d2fefed37883cb5de0ca2
116 Risk Score

Malware Insights

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

The file is a PDF document flagged as malicious by ClamAV and an ML classifier. Heuristics indicate it is a callback phishing lure, prompting the user to call a phone number. While no scripts were extracted, the presence of embedded URLs suggests a potential attempt to redirect the user or gather information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://leonvi.ru/award?keyword=weight+watchers+diet+plan+pdf+uk
    • https://static.s123-cdn-static.com/uploads/4473384/normal_5fec987e9561e.pdf
    • https://cdn.sqhk.co/bajowekununa/ujahfjc/instrument_tuner_app.pdf
    • https://cdn-cms.f-static.net/uploads/4451021/normal_5fd8504c903f6.pdf
    • https://cdn-cms.f-static.net/uploads/4419415/normal_60475b216162d.pdf
    • https://cdn.sqhk.co/jalotenabo/aTHgiU2/free_checking_account_balance_sheet_template.pdf
    • https://cdn.sqhk.co/gidulikegel/jggchb8/vubuzujonu.pdf
    • https://cdn.sqhk.co/vesagivara/Zijjfhh/ranking_list_app.pdf
    • https://cdn.sqhk.co/zurefaxenov/eTheq1m/telegram_and_gazette_cancel_subscription.pdf
    • http://zugemenelil.medianewsonline.com/dajov.pdf
    • https://cdn.sqhk.co/nemalerute/RcUJhcj/prank_call_wars_apk_mod.pdf
    • http://mesanezedid.mypressonline.com/giwuv.pdf
    • https://cdn-cms.f-static.net/uploads/4376359/normal_604a87a28bf03.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://defakulid.atwebpages.com/how_to_set_up_night_owl_security_camera_on_phone.pdf
    • https://s3.amazonaws.com/wekibik/87014323424.pdf
    • https://s3.amazonaws.com/bajapovogam/fujolunivedagadivasolo.pdf
    • https://s3.amazonaws.com/zetituri/78831344390.pdf
    • https://s3.amazonaws.com/tunenijexe/vubajot.pdf
    • https://s3.amazonaws.com/wutogugej/how_to_host_a_virtual_mystery_party.pdf
    • http://nununad.myartsonline.com/officejet_pro_8600_ink_cartridge_replacement.pdf
    • https://s3.amazonaws.com/tiluwisulepam/36887075296.pdf
    • https://s3.amazonaws.com/firigugixujotov/arris_sbg6580_password_change.pdf
    • http://terumalok.atwebpages.com/algebra_1_functions_test.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f493.bin
667b8cb795b3b740bbdcbcd6d122b47ddaa5ae63efac250e39fea2aed15fe168		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF493 5360 bytes
font_01_sfnt_off000106e3.bin
5d06e8c89cf1449621b97998051e532d32bebafced99c0afe69cbd96b17c9d5b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106E3 10472 bytes
font_02_sfnt_off00012ab5.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AB5 4324 bytes

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