Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9e469f2dc3c8b83…

MALICIOUS

PDF

74.8 KB Created: 2020-12-29 17:22:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 9dd534eec67e106c23eb8e905332d0d9 SHA-1: 90eab4e622f69fb0d3b7f710c3be56ffd624129d SHA-256: b9e469f2dc3c8b83e8a9b1ea42ad8be88e81636031f57e3e1a65735c082c0824
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was detected as malicious by multiple heuristics and a machine learning classifier. It functions as a link farm, embedding numerous URLs that lead to external websites. One of these URLs, 'https://ggtraff.ru/strik?utm_term=adventure+escape+dark+ruins+chapter+7', is identified as a known malicious redirector, indicating a phishing or malware distribution attempt. The document's structure and the nature of the embedded links suggest it is designed to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://ggtraff.ru/strik?utm_term=adventure+escape+dark+ruins+chapter+7 In PDF document text
    • https://turabevov.weebly.com/uploads/1/3/0/9/130968962/sukoxo.pdfIn PDF document text
    • https://fusupolupiritox.weebly.com/uploads/1/3/4/3/134374508/piduzedorajurek.pdfIn PDF document text
    • https://bajusumuke.weebly.com/uploads/1/3/2/7/132741128/kemere-suwitezajemim-giruramix.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501514/normal_5fcb708e8f865.pdfIn PDF document text
    • https://womomoko.weebly.com/uploads/1/3/4/8/134848640/3047014.pdfIn PDF document text
    • https://silifasakesi.weebly.com/uploads/1/3/4/5/134510621/1517219.pdfIn PDF document text
    • https://nabesoke.weebly.com/uploads/1/3/4/0/134042749/givejotagazane-kepexuwawa.pdfIn PDF document text
    • https://wawupibinotab.weebly.com/uploads/1/3/4/9/134900246/binupome.pdfIn PDF document text
    • https://tawurinerumirun.weebly.com/uploads/1/3/4/6/134648739/609467.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
    • https://uploads.strikinglycdn.com/files/29575a91-f8ba-462f-8770-92491492530d/three_houses_adjutant.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca72fc18-d767-4d93-b691-cb6450d0bee8/81084877059.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/36885982-c12d-41da-ba9d-9375846f47de/xexesozaboguxapid.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_off0000d999.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD999 5096 bytes
SHA-256: cca1e8fa3d591ed52f9f4e491f74674ca320037afdafd7946649b1e2439bf446
font_01_sfnt_off0000eaea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAEA 11016 bytes
SHA-256: da29ed30fbf9f819ece8f71798a01fd37ab01e039a97e2adbd56831788e7b540
font_02_sfnt_off00011074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11074 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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