Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8078e7bfb5f65a3…

MALICIOUS

PDF

59.0 KB Created: 2020-11-17 02:25:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 72e71eb6c8b1219d99f5e20b13903145 SHA-1: 212211af6cf13b7f6c2c74f7f91f97f2b309e676 SHA-256: a8078e7bfb5f65a3dca4be771c1af87378c8283150daa33f45725aa53531b844
156 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a phishing or malicious document, including a link farm and ML classification. The embedded URL `https://traffset.ru/strik?utm_term=baixar+livros+harry+potter` suggests a phishing lure related to book downloads. Although no scripts were explicitly extracted, the PDF structure and the presence of external links are indicative of an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffset.ru/strik?utm_term=baixar+livros+harry+potter PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392191/normal_5f924d3a86625.pdfIn PDF document text
    • https://jiwanozote.weebly.com/uploads/1/3/4/3/134354006/48521455447.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/tabobujimo/bansal_classes_study_material.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e2fbc47-8ca1-4070-994c-565cf8799182/tobabamoxazitapigotuzopag.pdfIn PDF document text
    • https://s3.amazonaws.com/nonipesikiri/76591058982.pdfIn PDF document text
    • https://s3.amazonaws.com/zobuwubedak/server_power_supply.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/84922a69-ae03-43dc-a386-5567cdb39ef0/make_it_stick_peter_brown.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/189c3e41-5cbc-41aa-b75b-1529f4544d83/giletokuvomuribodo.pdfIn PDF document text
    • https://s3.amazonaws.com/wajibile/45821303107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8900b9af-473f-4eea-8379-74035b5c8190/87294677475.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/84142290018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f161b00-cab4-4260-92ae-65c8950eace7/44869285107.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6493a75-ddb5-4329-934e-9c804078205d/the_irregular_at_magic_high_school_light_novel.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_off0000aa32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAA32 5184 bytes
SHA-256: d4d598b364fe4aa0df0abfaa6eddeeb38998844ea619249201dac0501b5b2ff0
font_01_sfnt_off0000bbdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBDF 10428 bytes
SHA-256: aed0bffbb47606beff58c2a17f4138f8e286877d21aaea3d3c908c08ffe0f1eb

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