Malicious PDF — malware analysis report

Static analysis result for SHA-256 8afe9cc01c674677…

MALICIOUS

PDF

70.5 KB Created: 2021-01-02 13:15:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: e4aae081413c4c0e40f65457c4eaea5a SHA-1: e818c92f9e69cc8f5576e435080c526723423d23 SHA-256: 8afe9cc01c674677582ead9e302d017f32040be35a3b9bc2d85ee4333a275571
214 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to external websites designed to host further malicious content or redirect users to phishing sites. Heuristics indicate the PDF is a redirector and part of a link farm, suggesting a phishing or malware distribution campaign. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/aws?utm_term=fusiform+aneurysm+meaning In PDF document text
    • https://xasugalepo.weebly.com/uploads/1/3/4/3/134311154/xorezasawu-rasokuwaponizem.pdfIn PDF document text
    • https://soxajenukaru.weebly.com/uploads/1/3/0/8/130874283/7501796.pdfIn PDF document text
    • https://rojomitalo.weebly.com/uploads/1/3/4/4/134485393/zazibakoko_luxanifiwezo.pdfIn PDF document text
    • https://rebazizezasij.weebly.com/uploads/1/3/4/5/134586802/movapuvulopobujib.pdfIn PDF document text
    • https://xejibojap.weebly.com/uploads/1/3/4/3/134310503/juwegaxotunepusuve.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/e45146f3-cb81-4074-9ce9-1b6454e86354/xofoxuxerejavagurujagek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8450025-6395-4b9b-babe-0ea1b678e627/chess_openings_for_black.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e2cba54-ae64-4b74-af36-9df08ac05415/rijezasekefo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10c8f55f-0ce7-4502-86c6-a300a0d043f5/6256392833.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/427d1bab-e7d8-44b3-bd94-5486921caf16/difaxudufite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67512167-ea37-4e9d-9c0e-d21d5c4f43f2/age_of_the_rebellion.pdfIn PDF document text
    • https://s3.amazonaws.com/roware/cosecha_robada_vandana_shiva_gratis.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/39981850850.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_off0000d8ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CA 5112 bytes
SHA-256: ba68deefe4c3ae30530c6a93b9d77ba09c8b9ebb8e7d254e34b2439ff581dffb
font_01_sfnt_off0000ea25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA25 10252 bytes
SHA-256: 35016f0d575bf4b094d48a8b17ea43e729d84976fbd330a7534c90267fa7b37f

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