Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8ab2dddc28b7158…

MALICIOUS

PDF

167.5 KB Created: 2020-12-16 00:44:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 91e97cc6140c7c67a31fa701b4e80d6c SHA-1: 1e9e097760e3c59ec7cad40feb111f3eeedecf54 SHA-256: e8ab2dddc28b71586a4cd53b7ac23e679bfdb1ead2437fa4bb90491c9be525b3
154 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://cctraff.ru/strik?utm_term=minds+on+physics+activity+45+answers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4420610/normal_5f9df62cb9679.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415770/normal_5fccc4b9213ad.pdfIn PDF document text
    • https://xoxopurotawasuj.weebly.com/uploads/1/3/4/6/134651309/ad04295b2a8.pdfIn PDF document text
    • https://poriveba.weebly.com/uploads/1/3/4/3/134316211/fisebefe_wipubelipus_rapigo.pdfIn PDF document text
    • https://ruzudafuzozuxu.weebly.com/uploads/1/3/4/8/134847081/7743621.pdfIn PDF document text
    • https://laxozutamof.weebly.com/uploads/1/3/4/7/134748247/3862851.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fc2b0d2239b0722913ccfbe/t/5fcf86597379aa35977b69a8/1607435866660/stupid_zombies_5_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/hotels_vocabulary.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e464ab79f442f229936f/t/5fc98706822fbd3263d5b499/1607042823509/xebisesulix.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf5209b1ed035389fe5a2/1606284577225/82382255908.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfe895e5c7695ca99606f9/t/5fc0dbf9173fb5383bc20d57/1606474755850/73024443592.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_off000253de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x253DE 5600 bytes
SHA-256: 0d887b4e247bbd793c022e532813bf82474877d3346364ebadd3a04304a2cda3
font_01_sfnt_off00026722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26722 12124 bytes
SHA-256: e15d282a478b6930d2715de9e077d03869d97aaa4eee28cb9fb07bb9d6f247bc