Malicious PDF — malware analysis report

Static analysis result for SHA-256 2838bd67f26b9db2…

MALICIOUS

PDF

82.3 KB Created: 2021-03-24 00:25:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acb1a42ab186505e81daa846cb1d38ec SHA-1: d045672950dc86d8a3e5fa69412efcffc3237ac5 SHA-256: 2838bd67f26b9db24d4bbf83e780ed577117459c32f1c21dc91f592c9ca5f466
104 Risk Score

Malware Insights

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

The ClamAV detection and ML classifier strongly indicate maliciousness. The PDF contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading a payload. The presence of a 'download button' heuristic further supports a phishing or social engineering attack vector. No scripts were extracted, but the overall structure suggests a malicious PDF designed for initial compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://vilenefex.ru/wix?keyword=14.1+human+chromosomes+workbook+answers
    • https://cdn-cms.f-static.net/uploads/4376606/normal_5fd1377aa9331.pdf
    • https://suwudaxodorepe.weebly.com/uploads/1/3/4/8/134885248/zawizakom-nurodera-gezusexapoviz-dewibomumavo.pdf
    • http://kataeta.club/74000836221p30.pdf
    • https://cdn.sqhk.co/jegisizozul/JibQjuE/29456245425.pdf
    • http://p-kavkaza.ru/how_to_lose_weight_eating_fast_foodq1c56.pdf
    • http://reduslim-italiaoficial.site/2633206242153tzg.pdf
    • https://mowasevibipogo.weebly.com/uploads/1/3/1/3/131379904/f6b7322d8b9c.pdf
    • http://segwaywheelchair.ru/703124194255utjb.pdf
    • https://cdn.sqhk.co/vovewotutal/a9chcJx/ruxakurofabazaxemijapi.pdf
    • https://static.s123-cdn-static.com/uploads/4413843/normal_5ff3ac6291a61.pdf
    • https://cdn.sqhk.co/mevazasid/fFDhcPZ/74700933812.pdf
    • http://sozapemogoz.mygamesonline.org/naive_bayes_classifier_book.pdf
    • https://cdn-cms.f-static.net/uploads/4487208/normal_6057e81e1573f.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/metubevozisul/how_to_shadow_puppets_hands.pdf
    • https://s3.amazonaws.com/rubidokezive/bangla_web_series_from_jalshamoviezhd._com.pdf
    • http://kenesowozowojaw.myartsonline.com/deductive_and_inductive_reasoning_in_math.pdf
    • http://kofaxafogi.myartsonline.com/josibero.pdf
    • https://s3.amazonaws.com/kavifunaruvi/8429421401.pdf
    • https://s3.amazonaws.com/jeponowon/how_to_remove_day_trading_restriction_td_ameritrade.pdf
    • https://s3.amazonaws.com/gotijejaj/bahubali_full_movie_filmyzilla.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_off0000f5a1.bin
f373c6b1a4f6b3c59246d3d1cb1181b8ac9a6603f79934b928add46ae37317a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5A1 5136 bytes
font_01_sfnt_off000106f5.bin
6fc05ba02796d75a7219710de7d37c2323c916f639d5fa7beea5c6e1a0b9b392		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106F5 11508 bytes
font_02_sfnt_off00012df2.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12DF2 4324 bytes

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