Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c161b6076a09ddc…

MALICIOUS

PDF

103.0 KB Created: 2021-02-15 09:55:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: a4b9ad1af04f22bd9f4f8c39172ee298 SHA-1: 03748023863d6ab7f48ea65c0d9cdcf4cba3526e SHA-256: 2c161b6076a09ddc0e4e964f0527ad196d753f387325f66f4e323ef53c401332
96 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded external URI pointing to 'https://leonvi.ru/123?utm_term=pinnacle+high+school+sthletics+online+registration', which is a strong indicator of a phishing or malware distribution lure. The presence of multiple Weebly-hosted PDF links further suggests a coordinated 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://leonvi.ru/123?utm_term=pinnacle+high+school+sthletics+online+registration PDF link annotation
    • https://vixikubinimagap.weebly.com/uploads/1/3/3/9/133997110/majoratan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486772/normal_5fdd3ab6c65b6.pdfIn PDF document text
    • https://demuxovepeb.weebly.com/uploads/1/3/4/3/134311881/valunaratup.pdfIn PDF document text
    • https://mewupevubuk.weebly.com/uploads/1/3/5/3/135387541/lopadolonuwovamedej.pdfIn PDF document text
    • https://kuweperiti.weebly.com/uploads/1/3/4/9/134904821/kijivanufopijo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474456/normal_5fd0f2c231446.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402488/normal_601604f66e1b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369915/normal_6018bd0db2850.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4494430/normal_5fffe0516c71e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://finedati.epizy.com/jaspersoft_report_call_api.pdfIn PDF document text
    • https://s3.amazonaws.com/mesotodimus/basic_civil_engineering_text_book.pdfIn PDF document text
    • https://s3.amazonaws.com/titugome/gyproc_resilient_bar_installation_guide.pdfIn PDF document text
    • http://sidiwen.epizy.com/kedeponomu.pdfIn PDF document text
    • http://zubafazebet.epizy.com/3859964510.pdfIn PDF document text
    • https://s3.amazonaws.com/fukepez/diabetic_ketoacidosis_guidelines_south_africa.pdfIn PDF document text
    • https://s3.amazonaws.com/kakekojezutok/searchview_database_android_example.pdfIn PDF document text
    • http://melaworogafema.epizy.com/lazodajize.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15628 5060 bytes
SHA-256: 8adceceae48c7a4a86405befd3a04392891f8e17ab328f387567c4ce38029d9b
font_01_sfnt_off00016756.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16756 11424 bytes
SHA-256: d5e0571a78e848d92fd239ac717c216d202f56b0132ead4ea8ff0ce7326e7a1c

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