Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f8dea3028dccf9c…

MALICIOUS

PDF

64.2 KB Created: 2020-11-29 05:52:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0a3bff3bbfa315a11d98525b765eca78 SHA-1: 594ec1be3a1cde85e5ad56f2ef3207de516823c7 SHA-256: 8f8dea3028dccf9ce9c9e58f9832a5a7cb087680e948adf1013252a80e4024f2
126 Risk Score

Malware Insights

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

The PDF file contains an embedded URI pointing to a suspicious domain, identified as a link farm on disposable hosting. ML and ClamAV heuristics strongly indicate malicious intent, specifically phishing. While no scripts were directly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site for further exploitation.

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 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.
  • 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://trafficel.ru/wb?keyword=nominate%20fine%20form PDF link annotation
    • https://wevinavuligi.weebly.com/uploads/1/3/4/5/134505150/4533824.pdfIn PDF document text
    • https://jedidaril.weebly.com/uploads/1/3/4/6/134687024/jipiluwefakudixeve.pdfIn PDF document text
    • https://sudogela.weebly.com/uploads/1/3/4/8/134846286/lalowizexalibotaza.pdfIn PDF document text
    • https://vubedokixe.weebly.com/uploads/1/3/4/7/134716192/viniwurijef.pdfIn PDF document text
    • https://wosufixojiniki.weebly.com/uploads/1/3/4/7/134720754/6946371.pdfIn PDF document text
    • https://gatofofuxiwiv.weebly.com/uploads/1/3/4/2/134265530/5315beec7c82.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/5122cfb1-4a0c-4362-961a-272d5ba39862/bosizedubevox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8fcf55d1-ccb2-4411-9a2f-0bb09f0f3eae/nesagadixilurod.pdfIn PDF document text
    • https://s3.amazonaws.com/pusolefosex/41560019607.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfa96e46-94bb-4632-8806-16e1c01a9d67/jesse_metcalfe_instagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14c3b316-0d58-413f-9fa0-d891abd76b78/85842008036.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e074c553-16cc-4c91-92b9-a38e726e0f11/paxidudekadaxexapazusev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c13021da-99c9-4276-a955-7e25119ceed3/progression_picot_cm1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/987a2651-af1b-4204-8a6c-f5f27c5da2aa/lecturas_con_preguntas_de_comprensio.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_off0000c162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC162 4672 bytes
SHA-256: b0637e70314cc2cdf98680661026408746b03d3b451b1707db9c8d79a08e13a3
font_01_sfnt_off0000d133.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD133 10324 bytes
SHA-256: 9c7e1f2bb51d172bc6c3c5ec178fb42e152e0b89e076da00e2090cd28bb73d28

Open this report in the interactive analyzer, or submit your own file for analysis.