Malicious PDF — malware analysis report

Static analysis result for SHA-256 74591557094fb6e1…

MALICIOUS

PDF

71.6 KB Created: 2021-03-09 22:46:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 07158041187f5492191ad6eaec40eb68 SHA-1: 730c10bfd8906c2ed4afd054cfc702539832e17b SHA-256: 74591557094fb6e144386f7a604329f938f74f87552f91c411f38563e26836da
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of the primary external links, 'https://druttle.ru/wb?keyword=kanawha%20county%20schools%20graduation%20dates%202020', appears to be a lure. The presence of numerous links suggests an attempt to manipulate search engine results or direct users to potentially malicious content. ClamAV also detected this file as 'Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0'.

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://druttle.ru/wb?keyword=kanawha%20county%20schools%20graduation%20dates%202020 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4425487/normal_5ff47c66e48cb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413578/normal_5ff49a7430872.pdfIn PDF document text
    • https://ginixagizelak.weebly.com/uploads/1/3/5/3/135349131/9551927.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449630/normal_5fe53f3b600ca.pdfIn PDF document text
    • http://ru-1.casa/what_is_stock_market_dynamics_all_aboutp9fpr.pdfIn PDF document text
    • http://podarokinsta365.site/983729451239st8k.pdfIn PDF document text
    • https://waboralitenir.weebly.com/uploads/1/3/4/5/134504299/pegatugegomik.pdfIn PDF document text
    • http://letgtma.bid/best_antivirus_android_smartphonesehcuo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501482/normal_60414217c865e.pdfIn PDF document text
    • https://nawuwisenaz.weebly.com/uploads/1/3/5/3/135318134/sikawefuponuz.pdfIn PDF document text
    • http://tipografiyav.moscow/76091585992jxrkt.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/27573235-5e86-4aa3-8d7d-02e305426ded/sarah_plain_and_tall_skylark_full_movie_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/makumapikeze/when_we_were_young_sheet_music_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e83c8c2-0769-43a8-a55a-396601be978d/27013292662.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/venapenejuxasanolojasano.pdfIn PDF document text
    • https://s3.amazonaws.com/sitozi/31141443730.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/vokixij.pdfIn PDF document text
    • https://s3.amazonaws.com/janodojivi/desmame_benzodiazepnicos.pdfIn PDF document text
    • https://s3.amazonaws.com/pisik/kuwifabema.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47b58cbb-5d09-4f49-be2d-4db4d1caa103/63464790637.pdfIn PDF document text
    • https://s3.amazonaws.com/wujapu/99361589819.pdfIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/introductory_clause_comma_worksheet.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_off0000d8fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8FC 5640 bytes
SHA-256: 2cce393baf3337441c705099e35005501f38d6b06225cd9e2592f569095ecc2a
font_01_sfnt_off0000ec47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC47 11004 bytes
SHA-256: 63b4a03582eaf925b8aca5f7267e4a4ae5bb3e40103290370868068119fc7c91

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