Malicious PDF — malware analysis report

Static analysis result for SHA-256 b8160c1a00f6ad7b…

MALICIOUS

PDF

82.4 KB Created: 2021-01-20 11:54:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f50d6c9fde41c6ba406946e30f47c47e SHA-1: e6b7aaa2ea4a468dc23a57cd05654da36f995c5f SHA-256: b8160c1a00f6ad7b1cb15333f640bf2b378f8d4a4b04f486fc4535e276c848f2
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, classifying it as a phishing trojan. The document's apparent purpose is to deceive users into visiting the malicious link.

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://jacksth.ru/123?utm_term=descriptive+text+structure+graphic+organizer PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4387920/normal_5f913fbf4c48b.pdfIn PDF document text
    • https://cdn.sqhk.co/pozigafo/fV1Y7if/rekizivotiwumizote.pdfIn PDF document text
    • https://cdn.sqhk.co/nazopekujavi/dhghggf/78601419937.pdfIn PDF document text
    • http://fepemewavitik.66ghz.com/36900616153.pdfIn PDF document text
    • https://cdn.sqhk.co/tixunudixa/Kggibgj/fastest_cars_under_10k_nz.pdfIn PDF document text
    • https://cdn.sqhk.co/sevidekepige/gjCTzYW/90415503999.pdfIn PDF document text
    • https://site-1177862.mozfiles.com/files/1177862/present_perfect_tense_worksheet_for_grade_5.pdfIn PDF document text
    • https://cdn.sqhk.co/lapefuxolu/VJ3CrQY/gabobevokefonimukewopola.pdfIn PDF document text
    • https://cdn.sqhk.co/movumatoz/qojbFYy/clear_virus_on_iphone_8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383132/normal_5f8bce85e58ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452376/normal_5fae8e75efc65.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zidumive.rf.gd/bodibego.pdfIn PDF document text
    • http://batalogafoma.epizy.com/bollywood_movies_list_2018.pdfIn PDF document text
    • http://suferipuwa.epizy.com/game_controller_for_android_phone_australia.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_off00010650.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10650 5340 bytes
SHA-256: 994f1d65e24cd865fc5b1b67337ba53c5adba2b338a08e9a00c71463d960911f
font_01_sfnt_off00011890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11890 10480 bytes
SHA-256: eda2f1718299637dbdde72bf7e1f89a033e72e00b37d88034b708dd85087f405