Malicious PDF — malware analysis report

Static analysis result for SHA-256 b46eb1e2051b0184…

MALICIOUS

PDF

125.5 KB Created: 2020-11-13 03:26:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d0fa3ceea44e27f10328eb86973aef6a SHA-1: 223bda7a7f45ff8d1122a1f238c43bcf1f5456e1 SHA-256: b46eb1e2051b01841c745d77d602b9fbc10ecaf079a7d2a64c0861028b44ecc4
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/123?utm_term=red+play+script+pdf PDF link annotation
    • https://fomikozifu.weebly.com/uploads/1/3/4/5/134511133/nosabigejipagetozok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/wukevirenesu/workplace_observation_test_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6049a7b4-8c51-4464-bccb-e0a61488c994/rifizitokubi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bd5b119e-e695-4938-af8f-05405359c734/power_pressure_cooker_xl_manual_en_espaC3B1ol.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/37928254002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2d4172a-b33f-4ba7-af3f-7ab1e5cff5a3/brian_younger_folger_hill_asset_management.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73a1e406-9e8c-4daa-8bd4-e681f8a40d77/2018_polaris_ranger_900_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/27122255788.pdfIn PDF document text
    • https://s3.amazonaws.com/bevekizadoxuj/naruto_road_to_ninja_dub.pdfIn PDF document text
    • https://s3.amazonaws.com/mejifavo/89461616814.pdfIn PDF document text
    • https://s3.amazonaws.com/xeponodij/lamento_della_ninfa_lyrics_monteverdi.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_off0001a240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A240 5256 bytes
SHA-256: 5884027be77f03f4f9cd3f3dfd260c1a8176c04c46e18df09e0b4315a1bcac55
font_01_sfnt_off0001b441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B441 16692 bytes
SHA-256: 77602941167a6df91bb29fd482516273124dd0d40df01a0ec7431c4fdb5ccb92