Malicious PDF — malware analysis report

Static analysis result for SHA-256 7881bb573692a2a1…

MALICIOUS

PDF

107.5 KB Created: 2021-04-17 03:07:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 56e2a8093803f53699d210b0052e7b82 SHA-1: d564f0436b8494678818cedbce17fe404be6493a SHA-256: 7881bb573692a2a1ca6f7b285eee7f03e83e87825a225e9a416ea6c39a99edfd
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The document body, though heavily obfuscated, suggests a lure related to 'conceptual schemes', which is a common tactic for phishing documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://resalured.ru/strik?utm_term=clases+de+esquemas+conceptuales
    • http://pifofobexaxel.mypressonline.com/epson_stylus_nx230_ink_walmart.pdf
    • http://bidetoluji.getenjoyment.net/63787477713.pdf
    • http://natural-shop.info/munavei45u0.pdf
    • http://lnstagramverifiedsbadgesforms.com/gafokogiduwoxatafamorikm8li0.pdf
    • http://tipografiyav.moscow/folk_songs_pleasevc6v0.pdf
    • http://nezowigivomi.scienceontheweb.net/6th_grade_math_worksheets.pdf
    • https://cdn-cms.f-static.net/uploads/4374700/normal_601f21c16fb66.pdf
    • http://tapidiv.medianewsonline.com/asking_questions_in_english_worksheets.pdf
    • http://rejawulomov.mywebcommunity.org/food_safety_certifications_llc.pdf
    • https://cdn-cms.f-static.net/uploads/4499285/normal_600cb7273a1dc.pdf
    • http://neojust.ru/ellipsis_tablet_keeps_shutting_offked2v.pdf
    • https://static.s123-cdn-static.com/uploads/4378175/normal_5feed9ee899a5.pdf
    • http://vixemifojetinag.sportsontheweb.net/die_buddenbrooks_buch.pdf
    • http://wejaduz.mypressonline.com/29171360970.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://liroporuki.myartsonline.com/online_banking_services.pdf
    • http://jikolelekad.epizy.com/rabefoxonepoze.pdf
    • http://zimunumiwu.epizy.com/wituz.pdf
    • https://fb9345b8-40be-4608-a8ff-9c5427dba92f.filesusr.com/ugd/98d639_a941e3447abb438da643d5710eb60d76.pdf?index=true
    • http://kabudevegal.epizy.com/72526283840.pdf
    • http://bogazukutij.rf.gd/sazikesitefafogaset.pdf
    • https://3bcdeb60-9876-4d14-bc0a-1dd1632c647c.filesusr.com/ugd/16a96a_2f9ba65f265d4ee6bc8aa5fa6c2dfb06.pdf?index=true
    • https://b913155d-2712-4fd4-bcc6-651970a8c456.filesusr.com/ugd/e39924_80028509119b4dff81e12a856c0793e0.pdf?index=true
    • https://c2bc7a71-cb21-434c-84f6-8d2fc09ed56d.filesusr.com/ugd/03ae60_e4807b1fffc346889ea3040ba8526426.pdf?index=true
    • http://kogotiru.myartsonline.com/gadirupaxixafuzubin.pdf
    • https://72a23b54-95c1-47c0-80d6-f7b1310faeb8.filesusr.com/ugd/65b209_0bbc089bc3d54f67915085fbfd60139e.pdf?index=true
    • http://tosabukevosubar.myartsonline.com/18845943021.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014e74.bin
f52e00d2e6bbe10d758d487129e7db226d38a4256cf8922efa119d4f93753c23		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E74 5152 bytes
font_01_sfnt_off00015fe7.bin
1d0a58416e01072e657bb273209b40074c97743ddfbe363cc79b98b7a663563d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15FE7 13308 bytes
font_02_sfnt_off0001898c.bin
242fba77d96c5ab84cd920abdfd8b8278d36c96caf737e409af15d8068860fd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1898C 16132 bytes

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