Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c3dd4946294ea9c…

MALICIOUS

PDF

62.5 KB Created: 2020-12-27 08:17:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 4eeb0fe8c09f658a570073988fc8abc7 SHA-1: 771101df82e8bfbf2cf669d99cabcbd4c50c3919 SHA-256: 3c3dd4946294ea9c651e56a623500772ecfe5a983b33800745ba3b028ae24c87
96 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. The document body, though partially corrupted, contains text related to 'Manual cateterismo intermitente limpo' and references wkhtmltopdf, suggesting a lure. The primary IOC is the external URI pointing to 'traffset.ru', likely a phishing or malware distribution site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffset.ru/aws?utm_term=manual+cateterismo+intermitente+limpo PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4384463/normal_5fa73a38bfe97.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387931/normal_5f9a125752022.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371247/normal_5fc473f7b66c0.pdfIn PDF document text
    • https://fumewalifo.weebly.com/uploads/1/3/4/8/134884483/lapesujulirozuf_sopine.pdfIn PDF document text
    • https://nagugopusoz.weebly.com/uploads/1/3/4/6/134645600/mefugujiwike.pdfIn PDF document text
    • https://davovexo.weebly.com/uploads/1/3/4/3/134355956/db3ced7ab1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456671/normal_5fd3972a25de6.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/b136039d-0b85-46fd-b864-ab0f9eefe1ce/genaratas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d98ba28-1b9b-486b-b51b-df7f39dc99b3/fosexe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/79b61329-d084-4132-9b8a-a9dd3589456d/tewosakekekewusimuvek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d849dbd0-f8cc-4345-a243-c4d5aad4b0eb/26567975630.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/68aa5660-addb-4b99-acfc-b559db9844ff/obama_alien_defense_unblocked.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_off0000b80b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB80B 5084 bytes
SHA-256: e87f35fc78ade523e635a2fef3ebd84be40e1391fba4c40c2ea218bc5f404147
font_01_sfnt_off0000c949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC949 10896 bytes
SHA-256: 8ea823e0743616d7476864b6b7ea1d2b25cefaa45ea54a0255c0c259b200f275