Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d60bb39a6394397…

MALICIOUS

PDF

75.4 KB Created: 2021-05-28 05:12:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d1129de737814c7a33679ada94e9321 SHA-1: 26d6ca52c2974839c6924e51cb974ffe7e15ccd8 SHA-256: 7d60bb39a639439762b9e24fcbf0bb1f9d19d853b832663b0ab730d216fb38f8
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' suggests the document contains a large number of external links, with one pointing to 'https://botokaw.ru/strik?utm_term=nombres+italianos+y+su+significado+para+mujeres'. This indicates the PDF is likely used as a lure to redirect users to potentially harmful websites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://botokaw.ru/strik?utm_term=nombres+italianos+y+su+significado+para+mujeres
    • https://padikolejak.weebly.com/uploads/1/3/4/0/134042397/lavano.pdf
    • https://sisebixa.weebly.com/uploads/1/3/4/6/134625325/gilos-novuguz.pdf
    • https://static.s123-cdn-static.com/uploads/4467273/normal_5fc84c9982df1.pdf
    • https://static.s123-cdn-static.com/uploads/4369905/normal_5ff7aa4b7b381.pdf
    • https://static.s123-cdn-static.com/uploads/4424647/normal_5fcba16b88b4a.pdf
    • https://cdn-cms.f-static.net/uploads/4366964/normal_60542f1f52629.pdf
    • https://static.s123-cdn-static.com/uploads/4461207/normal_6001214d30d7e.pdf
    • https://cdn-cms.f-static.net/uploads/4413968/normal_605db0f2e9b96.pdf
    • https://static.s123-cdn-static.com/uploads/4418985/normal_5fce9cff20ac1.pdf
    • https://cdn-cms.f-static.net/uploads/4485929/normal_6026bf74a5425.pdf
    • https://cdn-cms.f-static.net/uploads/4476946/normal_603ac697921fa.pdf
    • https://cdn-cms.f-static.net/uploads/4497372/normal_5fd92f0a0471b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/4a1f68f0-a6f5-40bd-b88f-fd7a87a52b95/what_is_the_purpose_of_mudras.pdf
    • https://uploads.strikinglycdn.com/files/f42b1e89-66ae-47d5-9dc1-654eed46e839/50239533561.pdf
    • https://uploads.strikinglycdn.com/files/87afa15a-f9d4-40c6-8f84-7d346f6cbe86/maths_for_competitive_exams_in_bengali.pdf
    • https://uploads.strikinglycdn.com/files/804a3070-f389-4f3a-95ea-952ee54996e4/descargar_diccionario_en_espaol_gratis_para_pc_sin_internet.pdf
    • https://uploads.strikinglycdn.com/files/dd468c4b-c1dc-4372-8280-c8d9ef70eda3/hp_laserjet_p4015_printer_specifications.pdf
    • https://uploads.strikinglycdn.com/files/91653e49-cad0-48ce-ad5c-82b196113663/farsi_ki_pahli_kitab.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e713.bin
4e8cdd3143f768f1eae60fe82cebcb1fa69759c74dd73dd9f0833e9b33c6421a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE713 5760 bytes
font_01_sfnt_off0000faae.bin
6c18433c6f3ef6d7eb3e805f660d08c8e4c009fbc43d8fe9cdf64bbe5983f70a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAE 11068 bytes

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