Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8264e6e3aa92015…

MALICIOUS

PDF

73.3 KB Created: 2021-06-07 09:52:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 16b32938cb6d9413a7489888806e5d83 SHA-1: 256bf3cc5319b95745e2c00e22a6cdcff20dbc1f SHA-256: d8264e6e3aa92015363425a76fdfceae177c18df57e662acf1473c1e36f12455
124 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many of which point to disposable hosting and are part of a link farm, indicating a phishing or redirection attempt. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the ClamAV detection 'Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0' strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to learning English, directing users to potentially malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8072

Heuristics 4

  • 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
  • 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://ketchas.ru/pbw?utm_term=livre+pour+apprendre+anglais+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5fd9800da788a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387040/normal_600934e91ce3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443812/normal_5fc746abca1e2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367940/normal_6050c930c3a13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466146/normal_6052394ed3d7a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4380214/normal_5fed46a7dd340.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450723/normal_600e26129682b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413567/normal_602c2238e880d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_604fd23c378f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446380/normal_5fd3d749aca54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470679/normal_600d27e4df6e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366003/normal_604d2253878b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489587/normal_5fe48150c1d25.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tisowowuduwe.pbworks.com/f/94552463651.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8a1b742-8d1f-4e0b-9798-55f1f76a0ce7/xupotibuwapewukotofaxoj.pdfIn PDF document text
    • http://wikoborumun.pbworks.com/w/file/fetch/144577197/wiki_acido_salicilico.pdfIn PDF document text
    • http://xovakovawup.pbworks.com/w/file/fetch/144705360/beef_fattening_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6faacae-61e9-47a1-964c-dc5a940ff0db/what_are_the_different_types_of_semiconductor_laser.pdfIn PDF document text
    • http://foziwedugumu.pbworks.com/w/file/fetch/144454602/manual_de_heladera_electrolux_di80x.pdfIn PDF document text
    • http://sawebaz.pbworks.com/f/51126381231.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bb6d85e8-97af-48fc-b535-40ce879ada8c/17072481101.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80931006-3e8b-444d-aabb-d5b6b61096c3/suvinon.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010f34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F34 5208 bytes
SHA-256: 13ac74c1c5f325a2ab99b41caa3f56ec9fad73b214857952aa4879e74110e150

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