Malicious PDF — malware analysis report

Static analysis result for SHA-256 e83a96d0ed58d699…

MALICIOUS

PDF

65.7 KB Created: 2021-02-19 08:41:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: c21f7a12c5ab05ed4b0c346fd3dfae16 SHA-1: 13fc0d22e088b90c75776a636f6ca833ce29108d SHA-256: e83a96d0ed58d699914c0252fd1e2440df5212eb133ff4de99e66c6678ec6f15
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, https://yafferge.ru/strik?utm_term=bose+wave+radio+remote+battery+size, which is likely intended to phish the user. The ML classifier and ClamAV also flagged this PDF as malicious. No scripts were extracted, but the presence of a malicious URL strongly suggests a phishing or redirection attack.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/strik?utm_term=bose+wave+radio+remote+battery+size In PDF document text
    • https://cdn.sqhk.co/mulepava/95iinLN/jolejubiwotej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482424/normal_601a55c540be6.pdfIn PDF document text
    • https://cdn.sqhk.co/wabajevebe/6cD7aTE/jaxenigokojumakimafodaf.pdfIn PDF document text
    • https://cdn.sqhk.co/xajamenujo/la2Uidx/tinetagopukakupogoliwi.pdfIn PDF document text
    • https://cdn.sqhk.co/wujakegu/egiqNlS/nifubugimijojuril.pdfIn PDF document text
    • https://cdn.sqhk.co/xovujiroveg/RifY4jc/guxulozeje.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420431/normal_60213ffae1d32.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408720/normal_600bf138ca6e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421959/normal_5fdac8339cff0.pdfIn PDF document text
    • https://cdn.sqhk.co/melipetoluf/ihaiajc/first_100_high_frequency_words_flash_cards_printable.pdfIn PDF document text
    • https://cdn.sqhk.co/gizoxemovefi/fgfhfhf/jipejumi.pdfIn PDF document text
    • https://cdn.sqhk.co/wibetaxor/Rjdgffy/shop_diamond_ml_murah.pdfIn PDF document text
    • https://cdn.sqhk.co/texafikogot/bidihGV/2645095370.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://falalovoxiwada.epizy.com/fusion_360_sheet_metal_tutorial.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB977 5112 bytes
SHA-256: 03783f9ac9e29f4e17a1ebae6216445ad41cb7fcb0a595ccccbdc7c637197017
font_01_sfnt_off0000cafe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAFE 9596 bytes
SHA-256: 34ce6b54f13a323c1b66ea2ba45739bea27dd352449dd4fbf232e48db00cf456
font_02_sfnt_off0000ebd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD4 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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