Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e35fb664ebfd061…

MALICIOUS

PDF

70.3 KB Created: 2020-11-23 20:32:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a29f66df169a3f0df322ec463ff226ab SHA-1: 98f4f5a7d3577643d04a954327b96be3e116b194 SHA-256: 8e35fb664ebfd061f426fd5579a81482bc47361952f87757f58198cd10a8a5ae
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://traffnew.ru/123?utm_term=william+van+der+woodsen+net+worth PDF link annotation
    • https://sakixuso.weebly.com/uploads/1/3/4/4/134488330/fesagopedubeg_kuxiwux_feguvomefuw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379233/normal_5f9da7430758b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372072/normal_5fb299f23d275.pdfIn PDF document text
    • https://goresizusozal.weebly.com/uploads/1/3/4/5/134524816/tolavaxexoxuwotose.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5fa2b817c3557.pdfIn PDF document text
    • https://jivoxafur.weebly.com/uploads/1/3/4/3/134382284/wodasorasitefufesidu.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/2d2e7e22-7445-4d73-bccb-3bba63e19503/21529120941.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ff15937-d790-4b07-83ac-f69e512f81d7/principio_de_peter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c6413a6-4063-45e0-be7a-1207f07df6e7/thanos_demands_your_silence_twitter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fc8e14e-4030-4f49-8c74-a28fc32b7cc0/vixezonodezativawupo.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_off0000d55a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD55A 5228 bytes
SHA-256: 976edba93f598960815c7e2f84c014a8738c639e936c6673390a24f11eadce16
font_01_sfnt_off0000e712.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE712 10980 bytes
SHA-256: 6b436048a45a8638ea4226fb5b26d912dce58ca0340f64c9d21ef08ff3eb4721