Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5123359901469e3…

MALICIOUS

PDF

61.0 KB Created: 2020-12-26 01:40:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 12840f919fc535dfb53d916901eafec0 SHA-1: 2c55b6ff33bad1812268a775128790faf51844cc SHA-256: e5123359901469e3663e6b0e89c1d06d05b428fe6342cd7787e5463bea5b1e22
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many of which are structured to appear as SEO-friendly content, suggesting a link farm or phishing attempt. The ClamAV detection and ML classifier strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/aws?utm_term=carolina+diner+menu+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5fa45de73f44f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469351/normal_5fdb100ee1807.pdfIn PDF document text
    • https://cdn.sqhk.co/nerenina/icheXjh/52269592800.pdfIn PDF document text
    • https://ginupegoforijef.weebly.com/uploads/1/3/4/7/134760486/jasidixavoxezip.pdfIn PDF document text
    • https://pebepatesova.weebly.com/uploads/1/3/4/4/134447190/9f38b.pdfIn PDF document text
    • https://nijomusuvul.weebly.com/uploads/1/3/4/6/134671469/5f7bd2579fd5c.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/megulu/67696276022.pdfIn PDF document text
    • https://s3.amazonaws.com/kudefem/52601720031.pdfIn PDF document text
    • https://s3.amazonaws.com/povelenavuviw/billy_sims_bbq_menu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0ee2d06-f654-4732-bcac-2603d50060a3/80306401513.pdfIn PDF document text
    • https://s3.amazonaws.com/betimugi/poems_by_laxmi_prasad_devkota.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_off0000b479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB479 4916 bytes
SHA-256: b7bdca94296d35a4f2c11b8202a22c5536cc65555f8e67c760fddd578b872bb9
font_01_sfnt_off0000c516.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC516 10180 bytes
SHA-256: 45936b8bce4de95bd5fa75ec6b77cb278a63bea4d49611f43e9fb8a952319970