Malicious PDF — malware analysis report

Static analysis result for SHA-256 a619cbdefb465bac…

MALICIOUS

PDF

259.1 KB Created: 2021-02-27 03:03:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcb29303f055194d08e4aa6c415373fe SHA-1: 6fe89525de24d86c8d8209b5d711678837925e9d SHA-256: a619cbdefb465bac21e0cb764863dd6585edd903396cbe135d447a8a88c0d89c
96 Risk Score

Malware Insights

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

The PDF contains an embedded link to 'https://xajibur.ru/123?utm_term=signals+and+systems+using+matlab+solution+manual+pdf', which is flagged as a high-risk indicator. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The document body, though heavily obfuscated, appears to be a lure related to technical manuals.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://xajibur.ru/123?utm_term=signals+and+systems+using+matlab+solution+manual+pdf
    • http://xevusezes.medianewsonline.com/fofedikamubelamarupefove.pdf
    • https://cdn-cms.f-static.net/uploads/4407810/normal_60290ae3dcf4a.pdf
    • https://motuzepiruwilo.weebly.com/uploads/1/3/4/3/134348631/7b62cabfc8.pdf
    • https://wefogazasu.weebly.com/uploads/1/3/4/8/134880183/8124361.pdf
    • http://zigorukap.iblogger.org/identify_parallel_and_intersecting_lines_worksheet.pdf
    • https://baboxubawuxi.weebly.com/uploads/1/3/4/6/134666135/482b285.pdf
    • https://sudodufutela.weebly.com/uploads/1/3/5/9/135960501/8593662.pdf
    • https://cdn-cms.f-static.net/uploads/4453142/normal_6031b367f049c.pdf
    • https://dixufewopirar.weebly.com/uploads/1/3/0/7/130775961/dazozinoru.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wejufutaz.onlinewebshop.net/zunafomutesagojagoxebe.pdf
    • http://fomariwidodazum.rf.gd/bio_data_format_for_marriage.pdf
    • https://s3.amazonaws.com/bakoloj/absolutismo_frances.pdf
    • https://s3.amazonaws.com/ganubatebedoxez/69595859404.pdf
    • http://xakizeko.epizy.com/cuantos_galones_tiene_un_metro_cubico_de_agua.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_off0003ae19.bin
51eca7835bc6f762c646adbc88fdbad8686a5134a1f5c277d7385dbb3c3b6d79		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3AE19 3104 bytes
font_01_sfnt_off0003b92c.bin
1b174103a464ab9240869e760e068e6ac8e6d94ca5a86bd596781754d59837ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3B92C 5612 bytes
font_02_sfnt_off0003cc34.bin
5d1125d3db3c1d5020a787fb3a25586be87837514f89af34615a98e60e078cdb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x3CC34 14996 bytes

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