Malicious PDF — malware analysis report

Static analysis result for SHA-256 b91582db790510d8…

MALICIOUS

PDF

69.8 KB Created: 2021-02-03 17:44:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 13d8333531711b05b3e78617deac2ceb SHA-1: 2789042d694d05e01029900e39c4efe40219abe8 SHA-256: b91582db790510d8ae6fadc6be69a36900a79146f4f8e14c7b17de438752adfb
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains text related to 'ffxiv training dummy locations' which is likely a lure to disguise the malicious URL.

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://jacksth.ru/123?utm_term=ffxiv+training+dummy+locations PDF link annotation
    • https://cdn.sqhk.co/kufedefivuvu/kvqidhc/93019728905.pdfIn PDF document text
    • https://cdn.sqhk.co/retesixabe/agiR733/26175843767.pdfIn PDF document text
    • https://cdn.sqhk.co/rakujolo/hdaxiab/vuforerurinobugevazusumog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412413/normal_5fcf940ec65a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378410/normal_6005c18a6e1f6.pdfIn PDF document text
    • https://cdn.sqhk.co/zowipitilo/RL3XfyX/zombie_age_3_hack_mod_apk_download.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476567/normal_5fece691b2c41.pdfIn PDF document text
    • https://cdn.sqhk.co/dolubivo/curjcxg/car_mechanic_simulator_2018_pc_money_cheat.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/pumele.pdfIn PDF document text
    • https://s3.amazonaws.com/wujodibu/1827397317.pdfIn PDF document text
    • https://s3.amazonaws.com/lulelepese/free_partnership_agreement_template_ontario_canada.pdfIn PDF document text
    • http://nogurinuzelajer.rf.gd/dezabutademapamuvutim.pdfIn PDF document text
    • http://vitimalu.rf.gd/carnatic_musics_free.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_off0000d2c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C6 5528 bytes
SHA-256: d4ee5633c47476dbf25903c52caa49ea398d451dea07974522dc7e1f303bc28a
font_01_sfnt_off0000e591.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE591 10948 bytes
SHA-256: d9c32002f235c54f94112f9f83762f5d2a41dd6be48483795954bc8492fb704f