Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f5c36cd0baf776a…

MALICIOUS

PDF

74.9 KB Created: 2021-04-27 00:00:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 07dbca356245f33587182a54dc5acf0a SHA-1: 2eda505a6b1b6546f75d90d5f9525d3b89c77b48 SHA-256: 2f5c36cd0baf776a5b696a5ec27fb2fc843d76da77fb46632f56526c87046f2e
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL that, when combined with the document's deceptive content, suggests a phishing or malware distribution attempt. The presence of PDF-specific heuristics and the ML classification strongly support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jacksth.ru/strik?utm_term=earth+stove+pellet+stove+parts
    • http://nukivapoj.iblogger.org/10736726595.pdf
    • http://ruperamumafuvaz.22web.org/zanimumuz.pdf
    • http://vejofewi.iblogger.org/badifosafafugosenepobaw.pdf
    • http://rukunikuxajosog.22web.org/oxford_handbook_of_clinical_medicine_10th_edition.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/legipalofi/pibijabavi.pdf
    • http://migisunutejelu.rf.gd/bedixusikemixusekebida.pdf
    • http://vixoxuzet.epizy.com/71652211473.pdf
    • http://bidesomixanir.rf.gd/77159475086.pdf
    • https://s3.amazonaws.com/gezizefefififa/xenarejemebakolu.pdf
    • https://s3.amazonaws.com/kavalukato/15976422399.pdf
    • http://zodabozaloti.rf.gd/nusefomezejalu.pdf
    • https://s3.amazonaws.com/wulotugadag/proof_david_auburn_monologue.pdf
    • http://pemupenox.rf.gd/unfailing_love_chords.pdf
    • http://vudafudilisa.epizy.com/yumi_usb_boot_free.pdf
    • https://s3.amazonaws.com/memobofilenabon/flight_of_the_bumblebee_guitar_tab.pdf
    • http://xoponupesede.epizy.com/61664011601.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_off0000e9aa.bin
0756c8f5fa883fb919026f888e93e3c6e9f0738a1a5dec885fc2cece05f820d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AA 4924 bytes
font_01_sfnt_off0000fa6b.bin
e6fd9dfbef1d6dc586118611fb0fe8b9a0d5bb6020c83a1036d1f6502b74f421		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6B 10752 bytes

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