Malicious PDF — malware analysis report

Static analysis result for SHA-256 54b73944bb9b2638…

MALICIOUS

PDF

72.8 KB Created: 2021-03-17 19:56:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12380962ba848a91d3bac4a0ebcbf462 SHA-1: 65e08e35622f9f50be7e56ce608d9e25850254a2 SHA-256: 54b73944bb9b2638fe6fe8239dc39c4c641efb87dc2ca0aba6eb8f756b7f69b6
96 Risk Score

Malware Insights

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

The file is a PDF containing an embedded URL that mimics a search result for a popular application. This URL likely leads to the download of a malicious payload, as indicated by the ClamAV detection and ML classifier flagging it as a phishing trojan. The presence of multiple unknown reputation URLs further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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=whatsapp+apk+for+smartwatch+dz09
    • http://rasezatoxefu.mygamesonline.org/70914060958.pdf
    • http://jifinipufiwide.iblogger.org/best_books_to_read_for_management_students.pdf
    • http://lasinonid.iblogger.org/filasafojotoziwudejitug.pdf
    • http://gejejasofubi.mywebcommunity.org/26534246061.pdf
    • http://biwejobezimije.22web.org/emacs_basic_commands_cheat_sheet.pdf
    • https://cdn.sqhk.co/wiberini/Rhdheii/wechat_backup_iphone_to_android.pdf
    • http://taxurofetizi.22web.org/81496314300.pdf
    • http://kazexezawulozij.mypressonline.com/tuwolotojavizi.pdf
    • https://cdn-cms.f-static.net/uploads/4368969/normal_603e07fdee364.pdf
    • http://kavuwabu.22web.org/why_does_my_oven_light_turn_on_by_itself.pdf
    • http://wapividazofar.scienceontheweb.net/zovefi.pdf
    • http://naxiramomamaz.66ghz.com/what_are_some_common_diagnostic_tests_for_schizophrenia.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://virixolozifala.epizy.com/pexirolom.pdf
    • https://uploads.strikinglycdn.com/files/9a063f07-4d00-4ca6-a917-9cd875578296/procreate_realistic_portrait_tutorial.pdf
    • https://uploads.strikinglycdn.com/files/f8aadf67-3711-46c4-93a0-37da73f06400/tufef.pdf
    • http://puzenufamem.rf.gd/the_psychology_of_color_and_design.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dcb7.bin
9374439ea17b483da2798168bc6d8ce6ff9703ea4a77f3848504b2e17da96e72		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDCB7 5880 bytes
font_01_sfnt_off0000f0b9.bin
f76d381e55149422bc0d825024d9f2d2492fe6f97659aefbc387a886080ce281		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0B9 11004 bytes

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