Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e6681579f350e7a…

MALICIOUS

PDF

69.4 KB Created: 2020-11-19 01:40:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 9311a37ad77ace52c1298c566f0a0974 SHA-1: 47a9f0bb37fb1136654b9d7de5ba31dd09826a5b SHA-256: 9e6681579f350e7af84ba973a4284cfab549ac1d15af24ab2ca40a7d1fa9211c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing lure. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing attempt.

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
  • 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://traffnew.ru/strik?utm_term=palabras+de+entrega+de+escolta PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4462096/normal_5faddfdbf2182.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/6275231.pdfIn PDF document text
    • https://netaluzubik.weebly.com/uploads/1/3/0/8/130813777/dobanabe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416128/normal_5fae02f8daa87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366969/normal_5f8743160710e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366367/normal_5fb4bd162ff0b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367905/normal_5f87c51c65f19.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/zaxawetawupo/tapukilolunelibepaji.pdfIn PDF document text
    • https://s3.amazonaws.com/zasepo/vexuzewivegapuwarof.pdfIn PDF document text
    • https://s3.amazonaws.com/jajoxulabojaso/marriott_kauai_resort_webcam.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/mawama.pdfIn PDF document text
    • https://s3.amazonaws.com/fufaragebo/sole_e25_elliptical_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/vifusupegiza/98549698978.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_off0000d063.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD063 5248 bytes
SHA-256: 9814cf8c824cf1c7b92767d745b8d05d988c49d365336e9127999b54caa5aa3d
font_01_sfnt_off0000e243.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE243 11456 bytes
SHA-256: 2d089d6ea9f5dcced4e0cf2f761ba87ae66462c8da687dd3d72619bb9e933f4b