Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc233e773d0870e3…

MALICIOUS

PDF

203.1 KB Created: 2021-03-27 18:43:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b9ebf43094fd4d355d455b36b4655a1 SHA-1: 7400adf479491da616ea93c311e958a410dfba10 SHA-256: bc233e773d0870e32f578664940ee88226c4f7428aff8323e4c8e6573bb74a9a
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing attempt. It contains an embedded URI pointing to a suspicious domain, likely intended to host a malicious payload or redirect the user to a phishing site. The document body, though truncated, suggests a lure related to 'Project refresh btd5'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://soxebez.ru/wix?keyword=project+refresh+btd5
    • https://jefiwoso.weebly.com/uploads/1/3/5/9/135996081/dapepog_vijija_wokikasulu_pivofef.pdf
    • https://losuwasujiro.weebly.com/uploads/1/3/1/6/131637226/5734748.pdf
    • http://vekisonoloze.sportsontheweb.net/jepikakuj.pdf
    • http://uscarinsurance.info/best_free_daw_for_windows_7_32-bitjrkwt.pdf
    • http://fastgetme.online/kusokito1qr0s.pdf
    • https://jumedewumeba.weebly.com/uploads/1/3/4/3/134310957/mojar-somobapevososov-muniwezubororib-jurifuk.pdf
    • http://supportcopyright.net/kitchenaid_stand_mixer_5_quart_whitea9tlh.pdf
    • http://dasezin.getenjoyment.net/vulaberizixo.pdf
    • https://kimetupuvojum.weebly.com/uploads/1/3/2/6/132680977/5780464.pdf
    • https://sekazijefof.weebly.com/uploads/1/3/2/3/132303314/4011729.pdf
    • https://fagojature.weebly.com/uploads/1/3/3/9/133987822/e0c1d49ebc.pdf
    • https://zuxadozi.weebly.com/uploads/1/3/4/6/134662888/gokusodububidewuxi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/a9783fe0-2a65-4080-a502-3c4350a90a3f/mupuxidukitojisesixulujuf.pdf
    • https://e809654a-a95b-4dbc-a338-24085255a2f8.filesusr.com/ugd/1b6cec_f4462b063d6f44e08e61936e5d599535.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a13af7e5-d0a3-4fdf-8587-7274db8d7161/how_do_i_stop_my_water_softener_from_leaking.pdf
    • https://8dac4d01-2cd1-45d2-8b5f-6005f802adc9.filesusr.com/ugd/1f96ce_1bfdaa2a6f694607b1d5c188265aef34.pdf?index=true
    • https://44bb6ee8-a0fe-4f72-890f-0f0a2fec05cf.filesusr.com/ugd/b65acf_350a3626d374491b852958b08569b870.pdf?index=true
    • https://uploads.strikinglycdn.com/files/4f31b900-4941-4eb4-a785-1e87c4ded207/wilekosasafozopax.pdf
    • https://uploads.strikinglycdn.com/files/3d447d4b-d4dc-47e0-a61e-398b1af9972d/65796423406.pdf
    • https://77bc4ea4-de20-41c0-a463-a5315db628d9.filesusr.com/ugd/2c69e3_eb599d452606462098e8c1571c7e1f87.pdf?index=true
    • 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_off0002e107.bin
f3e08371673bb883d5ce412ccaae2b60c7c980f4789002683b4b8bdf2d449e21		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2E107 5208 bytes
font_01_sfnt_off0002f2c4.bin
7739bb33725bd90528ac849bbc8f02da97e98503e2b68a70691c05e81dd80afb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2F2C4 12836 bytes

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