Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0fc426e820efcdc…

MALICIOUS

PDF

77.1 KB Created: 2020-12-26 19:05:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: ba00d6fa2670b71bffe29f59ccfedf16 SHA-1: ef53c95dd7c40a25089268aaa8c4437f165cda58 SHA-256: f0fc426e820efcdce7bd464006e0bf5b106d84d20c2cc92362b8f2a8884e29d1
214 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links pointing to external PDF files, a technique often used for link farming or to redirect users to malicious sites. Heuristics indicate these links are associated with malicious redirector infrastructure and a link farm, strongly suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection further corroborate the malicious nature of the file.

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://traffine.ru/strik?utm_term=make+your+own+music+apple In PDF document text
    • https://gurugurib.weebly.com/uploads/1/3/1/3/131384113/depuwelorisaro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489244/normal_5fb3012b147b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370309/normal_5fd67c118a0a7.pdfIn PDF document text
    • https://rukinedofixod.weebly.com/uploads/1/3/4/3/134348838/wosukumoxobuno.pdfIn PDF document text
    • https://dimaxafazeza.weebly.com/uploads/1/3/1/4/131453031/8767144.pdfIn PDF document text
    • https://tetemubegogik.weebly.com/uploads/1/3/4/4/134443084/puzasuzejub_zabek.pdfIn PDF document text
    • https://cdn.sqhk.co/parapirer/5Lrdkgf/91413625216.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460072/normal_5fb0417e857c2.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/352cbf5b-9b96-4e90-a929-bddf1cabb4a4/the_scarlet_ibis_packet_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/508f741d-92f1-4507-8618-6ed2ef030904/products_made_from_corn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9521d962-5568-415e-846c-60f564f137a6/what_is_cnn.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6d9aac2-afe8-410e-914b-629de0535f95/acceleration_physical_therapy_deer_park.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_off0000f00d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF00D 5344 bytes
SHA-256: bd91af93bc91facd7b232783cf1aa06fa5630ed35e9308e8e473c6705c8e12c4
font_01_sfnt_off0001024e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024E 11136 bytes
SHA-256: ec190620eef97f453eb5a9083dcd371fc4cfcc9f8e628b5c75664a2cebde2f0e

Open this report in the interactive analyzer, or submit your own file for analysis.