Malicious PDF — malware analysis report

Static analysis result for SHA-256 aefd5980a32c7121…

MALICIOUS

PDF

117.3 KB Created: 2021-03-14 00:50:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 9dbce4cc88b673d4216bbe16b91dd1d3 SHA-1: 195cb1dea4965205f08e3642badbe5c0c950c3d7 SHA-256: aefd5980a32c71219ea470e7a17eaa4dfc7eb557508e74bf7b060b2790c371a0
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant heuristic firing indicating a 'PDF_SEO_LINK_FARM'. The document body, though heavily obfuscated, contains text related to 'stream complete series' and 'wkhtmltopdf', suggesting a lure to a link farm. The presence of embedded URLs and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicate a malicious intent, likely phishing or SEO spam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/wix?keyword=stream+complete+series PDF link annotation
    • https://cdn.sqhk.co/mafowixodi/chgKNhf/66234819664.pdfIn PDF document text
    • https://cdn.sqhk.co/mibaforetu/hy8RX9I/56377023437.pdfIn PDF document text
    • http://betijeduw.getenjoyment.net/que_beneficios_tiene_la_educacion_fisica_en_el_cuerpo_humano.pdfIn PDF document text
    • https://cdn.sqhk.co/wadupaxi/jjYPii7/lock_screen_wallpaper_hd_1080p_windows_10.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/xidulumexi/pokemon_breeding_guide_x_and_y.pdfIn PDF document text
    • https://091a8774-b5bd-4fb7-8799-8d1ca0ca44ad.filesusr.com/ugd/8716ab_bab07c944f9d4e81905a6dc8a70527f5.pdf?index=trueIn PDF document text
    • https://ddc7b23b-31e5-4b5c-aaad-d3b7cef26861.filesusr.com/ugd/e506b8_0550f30a439a4ec09fb611ac6029d863.pdf?index=trueIn PDF document text
    • https://e25b7b56-d8f7-44cb-9276-56428e53d1cc.filesusr.com/ugd/63f3e8_b68e492bbab44ad9ac6edb81cc5ad1e7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/ligole/aharoni_italic_font_free.pdfIn PDF document text
    • http://buzumigasox.myartsonline.com/workplace_health_safety_and_welfare.pdfIn PDF document text
    • https://s3.amazonaws.com/fibesezati/valezun.pdfIn PDF document text
    • https://s3.amazonaws.com/xugigabitulu/dp_type_flow_transmitter_datasheet.pdfIn PDF document text
    • https://bf6af823-cb0d-4ee8-9d5b-4f0b1de5ed24.filesusr.com/ugd/9eb187_296446f768284d4987f24bd54005b202.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kikunojulejuj/dojavazepevokudin.pdfIn PDF document text
    • https://314a97e4-cc7b-499c-a999-42b15fb65c39.filesusr.com/ugd/fa4a73_c774e277da79494cbc00a50bba3d9513.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dalava/how_much_does_it_cost_to_fix_a_cracked_stove_top.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/metal_gear_solid_5_phantom_pain_walkthrough.pdfIn PDF document text
    • https://s3.amazonaws.com/gogonof/google_sheet_app.pdfIn PDF document text
    • https://s3.amazonaws.com/vuxagixil/cantata_147_bach_partitura.pdfIn PDF document text
    • https://s3.amazonaws.com/gorajikunobixi/gisozopavedas.pdfIn PDF document text
    • https://s3.amazonaws.com/genijusemu/us_air_force_uniforms_1970.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/carrier_infinity_error_code_31.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_off00018d48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18D48 5180 bytes
SHA-256: cb7219bc0cad840c31d69dcfe089b7a6ae241641d76f6caafe71c589a3a5b5c2
font_01_sfnt_off00019ecf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19ECF 11888 bytes
SHA-256: 159dd059d48431a2f8df7c90cd5f46c0f6cdd2f5a8e5266e6e4912c4ead1fd22

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