Malicious PDF — malware analysis report

Static analysis result for SHA-256 00873a2398b3c03f…

MALICIOUS

PDF

68.4 KB Created: 2020-11-20 02:06:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 79d5eea3d6a06ae46447dd54aed1d103 SHA-1: 10f8c7fc058c69c2a33567bdfc2218931d9796de SHA-256: 00873a2398b3c03f788f17912918d96af1e11137002493f9fc20035662b25754
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 0.9997

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://traffking.ru/123?utm_term=those+three+wishes PDF link annotation
    • https://xipunozelizu.weebly.com/uploads/1/3/1/3/131382486/580603f51cb56a.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/kinufijozulof.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/7e7f89ed-a2c5-406f-b893-bed49479c4e3/watebuj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2978c380-2d9e-4d97-ba6c-7a53fe8e772d/mawevafup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f77170cf-8c93-4014-8d87-20217af48213/21710742406.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/335e0f23-e40b-4bfa-93ad-f5fc694c090f/urge_basics_soundbrick_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7a5b177-ad7e-4403-9fd4-5293a184c141/roxio_hard_drive_watcher.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/dynasty_warriors_unleashed_reroll_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50f33549-28f9-48b4-943d-3177bfe11ecb/5385402459.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9b797ad-e45b-46fc-8b2a-8c09d34e38f4/36186081038.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efaeb1d7-db5f-41b1-a9c7-0c75dac1f5ed/7197975990.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_off0000d266.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD266 4572 bytes
SHA-256: 45df8e3bce3928f8cd6cf379c88e6ebe8534c7c4e85a7675f31ba16781e41490
font_01_sfnt_off0000e1fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FB 10348 bytes
SHA-256: 695e0407fa45a54fdf0b96f7469e4b6709b05e0392572ace610c308d171d6644