Malicious PDF — malware analysis report

Static analysis result for SHA-256 85d506a2e0ae692b…

MALICIOUS

PDF

75.7 KB Created: 2021-01-06 21:52:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: ba8cefb6d76c563772f38b15fb2f6df1 SHA-1: eafc0d58b346ecfea922707c2fa36cd31e048103 SHA-256: 85d506a2e0ae692b1c9e4e8bbaba4d3dd2a6a8e464886faf6993b8e911516cbc
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it is part of a link farm designed to direct users to potentially harmful websites. The presence of embedded URLs and the overall structure point towards a phishing or malware distribution campaign.

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 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.
  • 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/123?utm_term=dbx+driverack+review PDF link annotation
    • https://cdn.sqhk.co/majumoros/Ajihfi5/woloxamenu.pdfIn PDF document text
    • https://cdn.sqhk.co/kelopifagisu/jiWMQz4/steroid_brick_breaker_shooter.pdfIn PDF document text
    • https://vebuxevofarina.weebly.com/uploads/1/3/4/0/134013543/2903125.pdfIn PDF document text
    • https://kofusozefo.weebly.com/uploads/1/3/4/5/134515267/1838062.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/431569d9-5764-4926-8a8c-cd279c9c45cc/gujesugexuzapajabunut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae51db04-6848-45a1-ba07-07b4edcc05ff/fullmetal_alchemist_manga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ed9ddb33-00a3-4daa-9467-ea0efcbe8505/14436293314.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7fad14f7-b706-47e7-9fca-ed1a82d5ae07/foxagiboxeneboxel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9bde1668-afe8-426e-9870-6e6df6d25765/kaplan_step_2_ck_qbank_score_estimator.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1717be1e-72d5-4e14-830d-4ab365a0329d/nuduseralazefawiwepudimox.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e373312-0524-46e9-b061-e0d099ee20d0/98183618237.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/639b1fe7-1e00-4afd-bb58-20ca9d224f3c/48969104529.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fae7a8ba-8342-4cca-a911-0a6fd05b9108/90672991867.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_off0000e9f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9F3 5144 bytes
SHA-256: d976035110003385758d5582900dd0e8af8bc97cf1886059c396eb0904a751cd
font_01_sfnt_off0000fba0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA0 11500 bytes
SHA-256: 2296443e04698a71d542df3b73481e7899f3db430bafbb7eab648106629c8f09

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