Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7f98ef4ed8dfef0…

MALICIOUS

PDF

59.8 KB Created: 2020-11-20 09:58:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: a8c74e01109334f9af91cf554400a9e0 SHA-1: 9190a34649235663f889c3d2b997ea7dfac3cebb SHA-256: f7f98ef4ed8dfef0a237c600dcdef921b3997881f5e7f5f9ebfabb221e441f2a
154 Risk Score
Tags
free-cdn-ebook-manual-lure

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/aws?utm_term=single+candles+images+free'. ClamAV also detected the file as 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0'. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, likely serves as a lure to entice users to click the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/aws?utm_term=single+candles+images+free In PDF document text
    • https://wimixexaselu.weebly.com/uploads/1/3/4/3/134324609/b45573a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417122/normal_5faee7cacbd3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407552/normal_5f96747274f48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384037/normal_5fa9cc75eb0e6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/838cd3ba-5031-4da2-beed-7aa0bf0d8e1d/kugivugojaguvemix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9adda08-7d2d-48ac-94a6-6c0de8f7ce6f/spatial_verbs_asl.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa48bf8b-0b62-4c6a-bf68-fa2698672a86/warrants_in_yellowstone_county_montana.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/free_wiggles_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7450fd2f-e530-4755-b840-b5991c32655d/vibavevewiputawev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01144d06-cf61-461c-af99-8dcbb9145b6d/93239639527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a88c69a-9280-4f43-a359-74573c455ff5/citizen_kane_film_techniques.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3414a83d-5dba-422b-98d1-3e1ba0934819/76078915805.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_off0000adde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xADDE 5444 bytes
SHA-256: 1956d9b057b2c4e8095ca14ef85ce93e191e36fa750d90c3b0de8d8ed5196a2e
font_01_sfnt_off0000c049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC049 10072 bytes
SHA-256: 5bf999c3aa0569d8e9a04c13217a069dc6bac9593979d55bdfae0a993f5f7892

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