Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1b2603c36afc284…

MALICIOUS

PDF

79.1 KB Created: 2021-02-28 10:42:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: b4b5d200a90ee5f2f0c77d36ff73bc41 SHA-1: 597eb4b75ed648645a3014601a643ea0ff4cbc36 SHA-256: e1b2603c36afc284d1d169ff3b8bb421367ce839e8e0b2e29333600a4f4d2c43
126 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with one specifically referencing a video game walkthrough, likely as a lure. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm on disposable hosting, and ML and ClamAV classifiers strongly indicate maliciousness. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest the document is designed to redirect users to malicious sites, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/123?utm_term=tom+clancy%2527s+rainbow+six+vegas+2+walkthrough+xbox+360 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488336/normal_6018869aa6f7e.pdfIn PDF document text
    • https://betetudiju.weebly.com/uploads/1/3/5/3/135348010/53b3fe728b038.pdfIn PDF document text
    • http://vojidovalo.iblogger.org/rejigugiwatujed.pdfIn PDF document text
    • http://vejobazure.22web.org/letras_de_cantos_catolicos.pdfIn PDF document text
    • https://xakanokemuma.weebly.com/uploads/1/3/5/9/135965718/852502.pdfIn PDF document text
    • https://fexipipovunozem.weebly.com/uploads/1/3/2/6/132682859/xugakor-gadegub-zikinotun.pdfIn PDF document text
    • http://fuwefepor.iblogger.org/goxuwamisoxedelekewijiw.pdfIn PDF document text
    • https://zobigitesi.weebly.com/uploads/1/3/4/6/134691723/pimofiwinupalaxuno.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gulesovel.epizy.com/mevilejovow.pdfIn PDF document text
    • http://pegeligoxosoxuz.epizy.com/22389504395.pdfIn PDF document text
    • http://rawupegidozu.rf.gd/abdominal_aortic_aneurysm_treatment_guidelines.pdfIn PDF document text
    • http://fovabikomap.epizy.com/focal_point_business_coaching_brian_tracy.pdfIn PDF document text
    • http://fenigubigona.epizy.com/rebituruxukomatur.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_off0000f67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF67C 6312 bytes
SHA-256: 24dbc8b653f185d518e0b0f56607b3e015522979ef7b32352f72e2145c76f5b8
font_01_sfnt_off00010bf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BF7 10324 bytes
SHA-256: be6e22a0bf86744e4752d94a9468b4db874609c5691fcdbf50ca12bcb3aa2e01

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