Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d72f026382a0cf8…

MALICIOUS

PDF

65.5 KB Created: 2021-02-15 14:15:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: a79121dae49b8a452f6ff4f15ec94158 SHA-1: 61c6a9e697f8508365c88587c502ccd25d325a8d SHA-256: 3d72f026382a0cf844df6eefd3fff00cddb1a9fa0bf5ff11aad159de3d706e4e
244 Risk Score

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://crophysi.ru/wix?keyword=one+piece+vs+fairy+tail+1.1+kbh+games In PDF document text
    • https://laxatutokowo.weebly.com/uploads/1/3/5/3/135387201/pupadilese.pdfIn PDF document text
    • https://cdn.sqhk.co/zunezafi/shbIJig/59521401395.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492892/normal_6010c45b3af2e.pdfIn PDF document text
    • https://naleletilasimoz.weebly.com/uploads/1/3/0/9/130969891/xapabogapebuwomas.pdfIn PDF document text
    • https://litolojinoforiw.weebly.com/uploads/1/3/4/7/134721995/fewaketulu.pdfIn PDF document text
    • https://pidesetax.weebly.com/uploads/1/3/0/7/130739971/2504350.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493245/normal_6020bea5e8a83.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374853/normal_6029a0b7c6be8.pdfIn PDF document text
    • https://boxuvudadutubip.weebly.com/uploads/1/3/2/6/132695546/finesevufidubimo.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/jozaponi/palmistry_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/26204754416.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_off0000c276.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC276 5908 bytes
SHA-256: 7987e21a1dc3a58f988e9d3232250531ddf923d2ffbdd939fb2365da9200fa72
font_01_sfnt_off0000d67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67E 10116 bytes
SHA-256: 94f647ddd36f8f2b348903fe25914374ceb7f175699426d77a761a52d2b8896c