Malicious PDF — malware analysis report

Static analysis result for SHA-256 343b52de93399504…

MALICIOUS

PDF

65.5 KB Created: 2020-11-18 15:29:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 5dd2130c44f02188659b8fde2a3f91d4 SHA-1: 91bffddd1a1c904337983bd801abe0555de1c5b6 SHA-256: 343b52de93399504e57675ae3cf3c62f63cb2854977911056ac1b23e7e7f3e8d
96 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by 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 0.9998

Heuristics 4

  • 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://traffset.ru/strik?utm_term=logitech+x+530+driver+download PDF link annotation
    • https://vepewose.weebly.com/uploads/1/3/4/4/134486620/xugirakorofix_nokonosisutozex.pdfIn PDF document text
    • https://lekinowi.weebly.com/uploads/1/3/4/4/134476644/gokigovirip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459322/normal_5fa7100ce455b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392871/normal_5fb2fd3c8e75c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408584/normal_5f980ffd65d2c.pdfIn PDF document text
    • https://legadukevow.weebly.com/uploads/1/3/4/3/134313565/f0a1203a0fd.pdfIn PDF document text
    • https://pekireraseg.weebly.com/uploads/1/3/4/7/134720831/5048920.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368221/normal_5f9d752103d1d.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/aa75b83d-d06d-4bdb-b56f-3ea994acddf6/fitatoz.pdfIn PDF document text
    • https://s3.amazonaws.com/lopazura/marajeze.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/88bdbe2a-9f80-4ead-b3d8-303744c04d7f/everytime_we_touch_remix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/150c0278-c25c-419e-9712-43e142d0132b/fijetesoluna.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_off0000c2e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2E6 5612 bytes
SHA-256: 391a2f1b5ec9306e5701359f764752b9876cc6c53ed36ae89a4fea1af5b8f045
font_01_sfnt_off0000d61a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61A 10292 bytes
SHA-256: 21d454b94027d80528991dc11576a0912ed75ce902e649a84b4df03c42606045