Malicious PDF — malware analysis report

Static analysis result for SHA-256 b95d7cd9d5c5ada1…

MALICIOUS

PDF

83.9 KB Created: 2021-03-05 00:39:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 45016f97f74d744560184f17838d1a23 SHA-1: 51a8771b16af3b84f02ddf60ea001b26d489958d SHA-256: b95d7cd9d5c5ada1d9a302de86c8b78f4ac886097dbeb19e34a8a8ec7eb54990
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 0.9998

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://baarspo.ru/123?utm_term=genesis+from+genesis+to+revelation+lyrics PDF link annotation
    • http://paxezimusosesa.scienceontheweb.net/xiwesoki.pdfIn PDF document text
    • http://kowojolajamuv.getenjoyment.net/suzezelepu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://6b54b0b2-91db-43cc-88c8-bbc4f7e20b37.filesusr.com/ugd/a773aa_1edeca374d2d4e7fba5ed578b5a4fc12.pdf?index=trueIn PDF document text
    • https://76ed6b59-b034-43ac-b949-e1c08f76e3cb.filesusr.com/ugd/ee6100_3cf1013c9e374149a8a4e50a5f973733.pdf?index=trueIn PDF document text
    • https://cd753cf5-d90a-4073-9c55-931a76e81761.filesusr.com/ugd/8826df_e6b9193f54204799917aa31519403371.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sinadi/genetic_variation_in_humans.pdfIn PDF document text
    • https://d5cf7a15-73c9-49c9-ad57-d4f0303abb0c.filesusr.com/ugd/0d002d_96a172eb23cf42a7815e3778f896f219.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/voxulija/gnossienne_no_1_free_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/sezewu/chlorine_twenty_one_pilots_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/90166091612.pdfIn PDF document text
    • https://s3.amazonaws.com/pibabopuduj/54383722344.pdfIn PDF document text
    • https://2cc12256-1025-444a-bacb-901a9f007bda.filesusr.com/ugd/d1fcfc_c8e44406d66e47e0973daaf3158ad6e7.pdf?index=trueIn PDF document text
    • https://22449060-8e30-4723-8828-967625cce342.filesusr.com/ugd/eddc50_b03a85fd98ef4bd8854e185d715b0771.pdf?index=trueIn PDF document text
    • https://63c5840e-267c-49ed-94d3-fc9f9d8b9c0b.filesusr.com/ugd/8c5bc8_95a4e54f97d1499faee11ac0ca9a6171.pdf?index=trueIn PDF document text
    • http://pekamidakoj.atwebpages.com/72264383258.pdfIn PDF document text
    • https://s3.amazonaws.com/bagokiko/ato_log_book_template_excel.pdfIn PDF document text
    • https://c2093f15-f4fb-4bda-9582-db5404103fa6.filesusr.com/ugd/b28561_d4537913c578465f9c1a2e29742c0719.pdf?index=trueIn PDF document text
    • https://f55c6975-0091-4942-a106-dc80285e5f9d.filesusr.com/ugd/8a4248_7b8c26ec2a454a64a12ad5f054d48558.pdf?index=trueIn 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_off000106e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E4 5396 bytes
SHA-256: 81f4205f2efbc85a1ad944210407008be72c6fbf582d24f786efe1bede135d8b
font_01_sfnt_off00011939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11939 11516 bytes
SHA-256: 7229d448270877b3a165bd706e31349a4a31d0827b8d4fd8c05ead216711d104

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