Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea1b729987829645…

MALICIOUS

PDF

641.0 KB Created: 2021-03-11 09:26:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f68b20e635d3701735a44597a56fb2c2 SHA-1: 45b41d9fe63e50c8016ce9ba66ad9e4b5ca9e690 SHA-256: ea1b729987829645293136fb9462c3588e0b4cf916ac6ee422336fdf771c2531
136 Risk Score

Malware Insights

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

The sample was identified as malicious by ML classifiers and ClamAV, and heuristics indicate it uses an advance-fee scam lure. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs. The presence of multiple external URLs, including one pointing to 'seumenha.ru', suggests the document is designed to redirect users to malicious sites, likely to download further payloads or phish for information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6192

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
  • 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://seumenha.ru/123?utm_term=android+app+development+on+macbook
    • https://rimixobavi.weebly.com/uploads/1/3/3/9/133987070/sezim.pdf
    • http://spencermcman.us/sony_str_k840p_service_manual98ugo.pdf
    • https://cdn.sqhk.co/molipigi/dhdgjWk/enemy_gates_stealth_war_mod_apk.pdf
    • https://xedububedopo.weebly.com/uploads/1/3/0/7/130740082/xagirutuluberoloja.pdf
    • http://islemleriniz.org/fibotizel0g9en.pdf
    • http://endi-itali.space/les_miserables_musical_castle_on_a_cloudt4t2c.pdf
    • https://wizitizisib.weebly.com/uploads/1/3/4/3/134361222/37aad.pdf
    • https://vipamabukaxeban.weebly.com/uploads/1/3/0/8/130874648/b4c5e4ffb8ed19.pdf
    • http://microbestdigitalmeter.xyz/58075288987l1l40.pdf
    • https://cdn.sqhk.co/rularijulen/Fgflzjf/wivenoniditafisoso.pdf
    • https://cdn.sqhk.co/kuniremolu/2YifjeT/88839197940.pdf
    • https://cdn.sqhk.co/vuxesojogugu/agfgihc/texufokaxe.pdf
    • https://cdn.sqhk.co/mujejadalale/fhfm2gd/dutotopadezawojipason.pdf
    • https://cdn.sqhk.co/fesoxuleri/4hjhfqH/14545170143.pdf
    • http://goldstein.berlin/casio_edifice_chronograph_wr100m_bluecf674.pdf
    • https://jexafowasefuxuv.weebly.com/uploads/1/3/4/5/134588667/kewaratuwawaga.pdf
    • https://cdn.sqhk.co/zofizitene/Yifjdzk/79877308733.pdf
    • https://cdn.sqhk.co/vofaruvukuk/LhbXOhj/ragifififemodewitukeredux.pdf
    • https://cdn.sqhk.co/reparepoki/iIjheha/gejasubaziginituke.pdf
    • https://cdn.sqhk.co/laxiroroweno/gcjajez/expense_management_spreadsheet.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/7782303b-46ed-4e7b-8cb9-5ab7388cfa71/watch_the_hunger_games_mockingjay_part_two_123movies.pdf
    • https://uploads.strikinglycdn.com/files/0bbf1844-4b47-4b22-94e2-aac6d522a3a6/xelunuwekikudefalafulor.pdf
    • https://uploads.strikinglycdn.com/files/3c15b406-068b-423c-85db-7384045e4413/felices_dias_tio_sergio_completo.pdf
    • https://uploads.strikinglycdn.com/files/4d5a18ae-fcab-4be9-bdc8-a76413e4eeef/xorikefuvuka.pdf
    • https://uploads.strikinglycdn.com/files/40c83bea-9262-4f69-ba95-10801bc5d4f3/bagiwisukapes.pdf
    • https://uploads.strikinglycdn.com/files/07960f42-177f-416c-b9c4-874f3fdc586c/work_and_power_activities_for_middle_school.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_off0009b4ad.bin
63caeca4f884a7080d515ce3876e7c6c0b3e00d63b220b0be00fe6e6d9907937		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B4AD 5296 bytes
font_01_sfnt_off0009c6a7.bin
f79859c4aac25802f33fdcafc119771d1b509be4f4213561909bc6a3cf5abd20		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9C6A7 14012 bytes

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