Malicious PDF — malware analysis report

Static analysis result for SHA-256 84777edf133f5819…

MALICIOUS

PDF

67.5 KB Created: 2020-11-17 10:53:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 70ca8afe6a1b4a67b42b45977989c1c4 SHA-1: 71e460ac95e33c94c38e7c1380c2059a490c1aed SHA-256: 84777edf133f5819c86f0960f2647bcb9de5e647c635dc90f4973bf44db3f372
214 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external websites, including a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'War thunder cheat codes', suggesting a phishing or scam lure. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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=war+thunder+cheat+codes In PDF document text
    • https://cdn-cms.f-static.net/uploads/4417426/normal_5f9a5ee4ce6b0.pdfIn PDF document text
    • https://dawifebenunu.weebly.com/uploads/1/3/4/3/134374742/8d69b2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414176/normal_5fada0e02670a.pdfIn PDF document text
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/bbf935c44711.pdfIn PDF document text
    • https://pibefabetanob.weebly.com/uploads/1/3/4/3/134376782/ramuxaj.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/xapidajovaji/t_test_critical_value_calculator_online.pdfIn PDF document text
    • https://s3.amazonaws.com/vufuzewasi/44170854917.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/3449934553.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/basel_norms_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/jowuxokapevux.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/97886751851.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ac399ef1-0fdb-4299-8fb8-8076cc9611bc/6427540843.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e51843ba-7cdc-48d9-b7c4-59e101b90e52/99698645754.pdfIn PDF document text
    • https://s3.amazonaws.com/pegek/90898408255.pdfIn PDF document text
    • https://s3.amazonaws.com/lanowilovuviwib/jibaletebusuj.pdfIn PDF document text
    • https://s3.amazonaws.com/laradusa/24450335315.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_off0000ccd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD5 5008 bytes
SHA-256: 3f4f0ae80656b2216316d5d494f0c3bf0d7226543fcb6931a4e0682d6af3ed67
font_01_sfnt_off0000dde4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDE4 10456 bytes
SHA-256: 1b7c0ea1b5390abb9bfeb459fd9081096f05cb0c64b464bc7b10f9bfc2fd8581

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