Malicious PDF — malware analysis report

Static analysis result for SHA-256 312aa3cfcd2d98f5…

MALICIOUS

PDF

72.6 KB Created: 2021-03-05 08:21:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3504239025b6a04ed09ad911af246d37 SHA-1: 710bb7c238de48ce6f81620b5e7da1d56928f3dc SHA-256: 312aa3cfcd2d98f540d38ce168ee31b1c49fe8347c10494eaa28395939eb4f74
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document body, though heavily obfuscated, contains text related to a 'Stihl ms 310 manual', suggesting a lure. The embedded URI points to a suspicious URL, likely intended to host a malicious payload or redirect the user to a phishing site.

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/strik?utm_term=stihl+ms+310+manual+espa%25C3%25B1ol PDF link annotation
    • http://opt05.ru/gmail_app_settings_androidt0a02.pdfIn PDF document text
    • http://vetebozo.mypressonline.com/peliculas_mitologia_griega_dioses_del_olimpo_en_espaol.pdfIn PDF document text
    • http://fakixigulidol.mywebcommunity.org/88848118354.pdfIn PDF document text
    • http://tamakar.tech/satonawavoo9hq.pdfIn PDF document text
    • http://zugugalepew.mypressonline.com/bivugitexe.pdfIn PDF document text
    • http://mosquito.codes/earthbound_manual_snes4arom.pdfIn PDF document text
    • http://faxobasom.22web.org/algebra_1_worksheet_linear_equation_word_problems.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jutivowewinuled.epizy.com/66001870180.pdfIn PDF document text
    • http://roxifopovarag.rf.gd/everything_is_figureoutable_marie_forleo.pdfIn PDF document text
    • http://jojisoxig.epizy.com/alekhine_my_best_games_of_chess.pdfIn PDF document text
    • http://setowibuvi.epizy.com/citrus_heights_crime_report.pdfIn PDF document text
    • http://pesetunal.onlinewebshop.net/musot.pdfIn PDF document text
    • https://s3.amazonaws.com/dobesogum/lung_branching_pattern_formation.pdfIn PDF document text
    • http://guwaxilajoxeza.onlinewebshop.net/demomudijado.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/very_sad_katun_photo.pdfIn PDF document text
    • https://s3.amazonaws.com/najipavez/xidimetaxefexeg.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/aerobic_and_anaerobic_bacteria.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_off0000df2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF2C 5636 bytes
SHA-256: ffbe90e197bb7b3b05eb9094b65f2d9d9782dabed2b8e0598cc2c9837aa8df80
font_01_sfnt_off0000f1ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1EF 9936 bytes
SHA-256: c07b00b97d321c56b7ba2bea3565e9f2668a13d598ae3ae74f7721d7710c7013

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