Malicious PDF — malware analysis report

Static analysis result for SHA-256 9095756cd8925f9b…

MALICIOUS

PDF

74.7 KB Created: 2021-05-29 03:51:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 350293f4577daf35764e90ec433b2f66 SHA-1: 99cab545f8f94db527ef956cab3bf2cb953b6212 SHA-256: 9095756cd8925f9b412fde714813ba7c7c2142adf582f4c242d5c5519d46d5b5
134 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 by heuristics as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely a phishing lure to download further malware. No scripts were extracted, but the presence of a deceptive download button and the external URI suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://xezojetit.ru/strik?utm_term=mouse+toggle+for+fire+tv+apk+1.12+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457857/normal_6053055eda0c8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448337/normal_601e17073f7d8.pdfIn PDF document text
    • https://baxegirugono.weebly.com/uploads/1/3/5/3/135319521/b1491.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414491/normal_604cc48f2d42a.pdfIn PDF document text
    • https://vebaxifi.weebly.com/uploads/1/3/4/3/134360040/botewose.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495241/normal_60128c33e6b1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462982/normal_605c94678f6af.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426967/normal_60083bd92cbce.pdfIn PDF document text
    • https://bejobofilu.weebly.com/uploads/1/3/0/8/130814531/gewiw-tosujejebixeku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499958/normal_5fc9cf273ebdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382423/normal_605f2dba41d52.pdfIn PDF document text
    • https://gimokubibal.weebly.com/uploads/1/3/4/5/134528069/nagufupubepalon.pdfIn PDF document text
    • https://kivoranove.weebly.com/uploads/1/3/4/6/134679810/tonavaxinilivi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369173/normal_603871c35fd0c.pdfIn PDF document text
    • https://fotapudugibinok.weebly.com/uploads/1/3/4/8/134899903/kalilajer-pipafo-vebovob.pdfIn PDF document text
    • https://rigitugatelimo.weebly.com/uploads/1/3/4/1/134131632/tipiva-rubepokekire-raworasa.pdfIn PDF document text
    • https://marelepo.weebly.com/uploads/1/3/0/7/130738501/5511446.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/4c9b7cbc-194c-4de1-9acd-9c636f6bda63/kukidusejem.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20f61a38-2908-44a9-a8ed-5fe9d7de8ab7/fivolevevibiba.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ccf9658-8438-433f-a1d1-f918b68d5a52/download_fifa_19_apkobb_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb0abfd1-72d3-4ff1-9fda-bf59fd66813e/babulogipabidagiga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3110cf26-5bf9-4938-ba82-cb541fbf4837/63283346382.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6974291f-f791-445a-a52a-12cb9007f1ed/vapozono.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_off0000e60f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE60F 5552 bytes
SHA-256: 7840943806a2f2e63c2ac9e23dc2395e320ed8daeffa44c57545d988c43fe1c6
font_01_sfnt_off0000f925.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF925 10592 bytes
SHA-256: 880c7e9bfad58d0a0b526118d879d12ae5755c2511cdcb244fd89cfafdda0e11