Malicious PDF — malware analysis report

Static analysis result for SHA-256 7494e9d14b5a2ab2…

MALICIOUS

PDF

69.6 KB Created: 2020-12-03 18:39:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: c3857a5ea3aec1067bc5792ada0011d2 SHA-1: 9315931b259208a70df2d89604888e8491a22d42 SHA-256: 7494e9d14b5a2ab21ac5d7f748f08624a1d2609b1cb248006756a04a7bab238a
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://trafffi.ru/123?utm_term=gta+v+oppressor+mk2+customization PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4372980/normal_5fb943ffaaa92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393631/normal_5fa5e19d8fe90.pdfIn PDF document text
    • https://sivesasa.weebly.com/uploads/1/3/4/6/134669324/nukagivirujumeg.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/fekazudabo/94079557501.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4eddadf132613bbd766a4/t/5fc504e8f81c9a2a0c408418/1606747369558/binuni.pdfIn PDF document text
    • https://s3.amazonaws.com/dujepav/89861750670.pdfIn PDF document text
    • https://s3.amazonaws.com/fexuror/celulares_android_mas_baratos.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/business_management_book_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/ancient_mayan_religious_practices.pdfIn PDF document text
    • https://s3.amazonaws.com/texifaxepag/97149300328.pdfIn PDF document text
    • https://s3.amazonaws.com/ditiruz/97022057803.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e08512facd59ceacd9cd/t/5fc162929b1ed035380ff630/1606509203279/creed_google_drive.pdfIn PDF document text
    • https://s3.amazonaws.com/faserubafa/equalizer_2_full_stream.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_off0000d17a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17A 5384 bytes
SHA-256: 5ebc7f93a4695148308101924ea26852a444d62dd65f322f2e45efd323eb6ee7
font_01_sfnt_off0000e3ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CE 11096 bytes
SHA-256: 33118d0bd7c8f5351cc0ebe209647dbcf1032ca162db099d889f1c405f20fdd5