Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fd449185d9a3b9a…

MALICIOUS

PDF

68.1 KB Created: 2020-12-22 23:07:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f2a3b5e4ec49f64d2815fb134bb837b3 SHA-1: b798649965216ac07566bdf2cd9fd7ecc382e148 SHA-256: 0fd449185d9a3b9a6d294dc58e6c8a7133a02b4a8f02bf020cc5d687144b64cd
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://gettraff.ru/strik?utm_term=lop+bunny+runny+nose'. This indicates the document's primary purpose is to lure the user to this external resource. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing or trojan-like PDF.

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
  • 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://gettraff.ru/strik?utm_term=lop+bunny+runny+nose In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413975/normal_5fa6d83c30b39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380219/normal_5fd0fe147728d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478127/normal_5fc5cbf74673b.pdfIn PDF document text
    • https://tesekagaz.weebly.com/uploads/1/3/4/3/134342497/f83bea55.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/sebunuzu/gevuzaxusujetavozekamokew.pdfIn PDF document text
    • https://s3.amazonaws.com/xukirizugukugi/dolesabogikizuta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ac30faa-b1fa-4750-af72-42dcc90d0920/vefakomejasiwodevoviwada.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/chevrolet_colorado_2017_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89a4bda5-5943-4a5e-b553-d89529ad2f49/vojumemanimuzafuva.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/xisiwebarupeduxobav.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d71bf92f-efa9-4fc7-8476-9ba68e38447f/81424737001.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b25a8fe5-9372-4bab-88b8-1519ec05f811/domixesabilosek.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_off0000d19c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD19C 4752 bytes
SHA-256: a0138b6d3425292d10233dcf5ff5e757ec7b1e63e54f6d1737fa9df98cd8759b
font_01_sfnt_off0000e1d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D9 9980 bytes
SHA-256: ae9cfb125523ec74b66c4d352a8f1ed30b956472a551ea366f9a59a34359408c

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