Malicious PDF — malware analysis report

Static analysis result for SHA-256 43d51111efa65c43…

MALICIOUS

PDF

80.9 KB Created: 2021-03-31 08:46:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5b25fd2fd818bfb91a6788a2fe8b80ce SHA-1: 7583fc0c918ef4c4ee71a8847dc5f3603220d8b2 SHA-256: 43d51111efa65c43a828fd094667440e220a5380e4018b629254ec24d3ca9ddc
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The document contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing or malware distribution site. The presence of the 'Pdf.Phishing.Trojan' signature strongly suggests a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=cardboard+helmet+iron+man
    • http://tagaporigowekis.mygamesonline.org/12172967041.pdf
    • http://manovina.mypressonline.com/little_women_book_cover.pdf
    • https://cdn-cms.f-static.net/uploads/4369793/normal_6060544013ac7.pdf
    • http://redirerer.medianewsonline.com/xefomufabodez.pdf
    • https://cdn-cms.f-static.net/uploads/4424682/normal_60618adbf349f.pdf
    • http://buboripixorezu.iblogger.org/applied_mathematics_books.pdf
    • http://xuvavarapegu.mywebcommunity.org/autocad_tutorial_free_download.pdf
    • http://ziwusis.getenjoyment.net/how_can_alexa_control_fire_tv.pdf
    • http://bajoreto.sportsontheweb.net/new_english_file_elementary_teacher_s_book_slideshare.pdf
    • https://static.s123-cdn-static.com/uploads/4427781/normal_5fce0fc13d7d9.pdf
    • http://bozesedixek.mywebcommunity.org/appareil_de_golgi_cours.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://143c7e3e-1a56-4739-9c24-5aac26b0263b.filesusr.com/ugd/28d7c1_2eb17fbba7c44e2b8f5783b1c7a97b8b.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b5a99aac-319a-41ab-b52b-1eef9c742be6/32378806194.pdf
    • https://badbb018-ab4e-499b-b788-960949b82e3d.filesusr.com/ugd/4f4c56_d7e52698bfd64c6baae21c8b638525e4.pdf?index=true
    • http://dekifovep.epizy.com/madefaduzokodifoxego.pdf
    • https://ec8c99fd-5413-4e38-b6a0-2ccbba71fc6f.filesusr.com/ugd/de02f3_da03e8a38da1489482e81efe42f69b8f.pdf?index=true
    • http://vogokibogewete.epizy.com/why_does_my_hair_dryer_keep_turning_off.pdf
    • https://uploads.strikinglycdn.com/files/146e22fc-d725-4b9f-9d1c-0688b1c0be2c/hp_laserjet_p3015_printer_51.10_error.pdf
    • https://6c8027e1-9878-41b3-a9ef-32ba2b6bcd02.filesusr.com/ugd/185811_f3541b7777a1424a925810d14b2632a2.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_off00010133.bin
303bdac64a684c32395cf3a0aa46a285290d16c7aa96f6411b249f9f520f3390
pdf-font-stream PDF embedded font (sfnt) at offset 0x10133 4932 bytes
font_01_sfnt_off000111c5.bin
0f8ec1981420feeff8718bcfeca6a62360813104424e40df1c97789fa16e20ef
pdf-font-stream PDF embedded font (sfnt) at offset 0x111C5 11064 bytes