Malicious PDF — malware analysis report

Static analysis result for SHA-256 597a069d78c9197c…

MALICIOUS

PDF

171.1 KB Created: 2021-03-31 20:59:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b460509168e4204cbbf549fcfcf8489a SHA-1: b2d8bf2fe5f6d4200b2816053a6e73948a3e1471 SHA-256: 597a069d78c9197cc4893ec9377ab9f5b1c005fdb17ecdec6405be1f7546d882
136 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The document's content and heuristics point to an advance-fee scam, likely distributed as a phishing attachment. The embedded URLs are likely part of the lure or a subsequent stage of the attack, aiming to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/wix?keyword=nascar+monster+energy+2020+standings
    • https://cdn.sqhk.co/wuvupalib/hhha3xi/shipwrecked_egg_harbor_menu.pdf
    • https://bumaxaxup.weebly.com/uploads/1/3/4/2/134235918/4e91529e573b.pdf
    • https://cdn.sqhk.co/rorajakura/gjjhajc/4257105301.pdf
    • https://cdn-cms.f-static.net/uploads/4467032/normal_60438eb4b08e1.pdf
    • https://cdn.sqhk.co/tizesefetus/cg1YCvw/guess_the_band_picture_quiz_answers.pdf
    • https://cdn-cms.f-static.net/uploads/4465131/normal_602be72eb5fe2.pdf
    • https://cdn.sqhk.co/letijefa/hjNhdkk/62258753278.pdf
    • https://gebawifu.weebly.com/uploads/1/3/1/4/131483167/f1c3f3bc714f2ca.pdf
    • https://cdn-cms.f-static.net/uploads/4469370/normal_5fe90dfac69a8.pdf
    • http://rcasino.info/jowimasuzuf808m9.pdf
    • https://cdn.sqhk.co/tarozawowe/bicgjia/platinumlist_discover_events_book_tickets_online.pdf
    • https://cdn-cms.f-static.net/uploads/4460228/normal_604d1121cff37.pdf
    • https://ripabefemedoge.weebly.com/uploads/1/3/4/3/134321398/79619a24399d587.pdf
    • https://cdn-cms.f-static.net/uploads/4387412/normal_602c81214bc5f.pdf
    • http://cz-nitrof.website/2013_jeep_grand_cherokee_laredo_transmission_problems1hfxw.pdf
    • http://help-copyrighteamservice.com/lirewefuka6v1h7.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/57478be4-06f4-45cf-85f5-fcff7e8d25db/dulubaxifegasalemaxuxif.pdf
    • https://uploads.strikinglycdn.com/files/75fe5499-ef53-49a7-a7a4-71d24118009b/misijul.pdf
    • https://uploads.strikinglycdn.com/files/b1b20945-bf26-4b01-8ea1-d294a6e8c7a8/53984914718.pdf
    • https://uploads.strikinglycdn.com/files/2753ab53-c5bd-4054-b077-d1bccfa054b5/what_car_seat_is_compatible_with_baby_jogger_city_select.pdf
    • https://uploads.strikinglycdn.com/files/0c86b357-0be8-480c-af2b-9d185e452a16/metallica_nothing_else_matters_chords_for_beginners.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_off00025416.bin
63c197098e8a10e1ad2ba8ac87cc44f30a62c97f017d98130c9f6f703e824022		 pdf-font-stream PDF embedded font (sfnt) at offset 0x25416 5360 bytes
font_01_sfnt_off00026637.bin
aab9fb6ed32acc564ce9a94c0ccea9518c91fbedc17a0457cc23981748b90af8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x26637 11944 bytes
font_02_sfnt_off00028e7c.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x28E7C 4324 bytes

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