Malicious PDF — malware analysis report

Static analysis result for SHA-256 2200338290c0dd5c…

MALICIOUS

PDF

65.6 KB Created: 2020-11-23 14:06:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 41dce16a2eeb7fd6aba22d0ada43af40 SHA-1: df1b0b15d4be95cdb36b2e483493f3e4041837ec SHA-256: 2200338290c0dd5cee9e13ec3b25e17d76e810ff73d9e5dd641e08e0a366f4d0
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://trafffe.ru/strik?utm_term=truman+sleeps+partition+piano PDF link annotation
    • https://difomojixi.weebly.com/uploads/1/3/4/3/134319012/22edbee803.pdfIn PDF document text
    • https://gunomelovolif.weebly.com/uploads/1/3/4/7/134735852/017abaf70e1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383917/normal_5fb6eff677d09.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391037/normal_5f91c7d5c3059.pdfIn PDF document text
    • https://nobujowufovipi.weebly.com/uploads/1/3/4/6/134636268/pefeg_sekumukoj_wirekubid_wifilevifegeki.pdfIn PDF document text
    • https://piwazolobaki.weebly.com/uploads/1/3/4/7/134714131/dojokez.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/8742796.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kubafezin/27213747129.pdfIn PDF document text
    • https://s3.amazonaws.com/bifamomove/23258172901.pdfIn PDF document text
    • https://s3.amazonaws.com/xelimewat/dovetail_cutting_guide_barrel.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ac5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC5B 4796 bytes
SHA-256: 516f06ef10b51cae7194217195b30d7bcf0c98b234722a8f707d0d69d71aaeb7
font_01_sfnt_off0000bc83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC83 14564 bytes
SHA-256: 5d06aa86095479a92286b4d1aa7469c478f8b3d36dd1bf17404256470480653f
font_02_sfnt_off0000ea33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA33 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71