Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ea1f25db26c8ce…

MALICIOUS

PDF

83.2 KB Created: 2021-03-08 23:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: e3a7eee8d937209028467df5adb4030d SHA-1: bd5b69089184bc26fa8e95ba2be410355d0f24b3 SHA-256: b0ea1f25db26c8ce1a5614e243cf55a909b37862c56f3c730443f59c27bfe57c
194 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting services, suggesting a link farm designed to host malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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 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.
  • 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://mezovuduw.ru/award?keyword=biological+science+6e+freeman+pdf PDF link annotation
    • http://barcaporirternet-interbank-pe.com/649034798922s5i6.pdfIn PDF document text
    • https://kajovagej.weebly.com/uploads/1/3/4/7/134747054/debefadamudo.pdfIn PDF document text
    • http://praktika-ingenieur.com/cobra_driver_pack_isogwe4p.pdfIn PDF document text
    • https://nibevomixosu.weebly.com/uploads/1/3/4/1/134108547/4000893.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482228/normal_6017156f50e11.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4493266/normal_6000a1ef3c6c8.pdfIn PDF document text
    • http://copalofa.site/pemuligobokunr7hm.pdfIn PDF document text
    • https://vunixumo.weebly.com/uploads/1/3/1/4/131453253/3531897.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://314a97e4-cc7b-499c-a999-42b15fb65c39.filesusr.com/ugd/fa4a73_e7ad70c5cedb4d059568704eec4adfd4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/640a6f79-75dd-4df3-b9e4-f2105a3deb2e/9324463563.pdfIn PDF document text
    • https://8ed6bd9f-de2b-4923-b7df-82f95eb18a03.filesusr.com/ugd/7fa32f_fdaa58b0628945c7b3a2645fb0679d4f.pdf?index=trueIn PDF document text
    • https://c8019651-2137-4367-b38e-775fff3f8a75.filesusr.com/ugd/fc5a02_791ec732139b499abd94c40a191cad5b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/47fac88b-7784-4aed-9b50-fdc35adaf121/80353737937.pdfIn PDF document text
    • https://6c036dbd-b327-4678-b778-de8a2ee7bb50.filesusr.com/ugd/ed64d2_69aae65e8c6a4f858e31cefa454ee823.pdf?index=trueIn PDF document text
    • https://d05b2b94-0af3-401c-a6ef-75d00d0b58ae.filesusr.com/ugd/3bca44_13fa3da3e89a46d6ac321f7fdd4b233f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c45c5255-b0ce-42fc-8ad6-3ac4070165f3/bonodezotufagadidimap.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_off0001075c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075C 5676 bytes
SHA-256: 1892b2ac73ee221168c73a5c75e494a461605a9e059ea6ad090100b9cb04785a
font_01_sfnt_off00011a9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A9C 10944 bytes
SHA-256: a48c96fa911b26b91de8a59c335f2c675189c78b82744a496f96122ceca0f9cc

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