Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1695a359fdb5528…

MALICIOUS

PDF

81.1 KB Created: 2021-04-06 01:40:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6d8184b319896931e00d0c694399408a SHA-1: 2435d83bf5fa9dad48e27813b5f17cfcc490684d SHA-256: b1695a359fdb55284e44493dd191e5e20232ce47013e325a9ea94481b3fa5716
96 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to job applications.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://nipisod.ru/strik?utm_term=chick+fil+a+job+application+for+16+year+olds PDF link annotation
    • http://tezoxefakalexo.sportsontheweb.net/administracion_de_pequeas_empresas_libro.pdfIn PDF document text
    • http://boguvijuximu.22web.org/52231972664.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475741/normal_6004da8cc0e3f.pdfIn PDF document text
    • http://gedadekenoz.mywebcommunity.org/what_astrological_sign_is_november_22.pdfIn PDF document text
    • http://narawodosure.medianewsonline.com/94811670364.pdfIn PDF document text
    • https://nulenedo.weebly.com/uploads/1/3/6/0/136084055/5186bab.pdfIn PDF document text
    • https://pepedojimu.weebly.com/uploads/1/3/1/0/131069997/8011924.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498997/normal_5ff64e75ef3b6.pdfIn PDF document text
    • http://kazexezawulozij.mypressonline.com/accounting_and_finance.pdfIn PDF document text
    • https://tavifarexup.weebly.com/uploads/1/3/4/6/134611028/7b380a4c6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401712/normal_5ffc76969d291.pdfIn PDF document text
    • http://zugobopepoj.sportsontheweb.net/areas_and_volumes_of_shapes.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rasunafosav.epizy.com/2019_action_movies_for_free.pdfIn PDF document text
    • http://kemuvatixas.epizy.com/22938305411.pdfIn PDF document text
    • https://s3.amazonaws.com/lazesej/balance_sheet_reconciliation_format_in_excel.pdfIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/what_is_the_price_of_a_yamaha_250_outboard.pdfIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_3520f0a4dcfc4c1e8a3eb02253271a92.pdf?index=trueIn PDF document text
    • http://jedirolin.rf.gd/video_calling_app_android_code.pdfIn PDF document text
    • https://s3.amazonaws.com/wazagidonux/active_listening_skills_for_teachers.pdfIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/elite_gourmet_-_10l_digital_air_fryer_oven.pdfIn PDF document text
    • https://s3.amazonaws.com/farefasejikap/3256986546.pdfIn PDF document text
    • https://c96d0889-97fb-4213-90a4-a08ae01970e6.filesusr.com/ugd/ed32f2_66e67c630f56466b963ffdd663ea7460.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE6B 5640 bytes
SHA-256: 901179e98d90811fdc40b158b8cd453779689885032e526f17dbf413183a9c06
font_01_sfnt_off00010192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10192 11520 bytes
SHA-256: 636b9cf755f5dd13dd59316b572c18f221be2f16495c33890126ea7539c04192
font_02_sfnt_off00012884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12884 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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