Malicious PDF — malware analysis report

Static analysis result for SHA-256 0469ef43838b19b4…

MALICIOUS

PDF

79.0 KB Created: 2021-04-01 18:57:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ff4ea16ff2e86a6342a18ace8f832bf SHA-1: 5d523bddfe178b58403fcab8bdf17d5d84c30251 SHA-256: 0469ef43838b19b442f950fa8862b4715cd5ae28a585316c69e6ff757225c20c
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a 'link farm' by heuristics, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to business templates, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://soxebez.ru/123?utm_term=ownership+structure+chart+template+excel
    • https://cdn.sqhk.co/zolokike/O20ghVt/7490385881.pdf
    • http://mizizufiku.mywebcommunity.org/70703707183.pdf
    • https://cdn.sqhk.co/xavonepez/ra2Jdhg/18089314268.pdf
    • https://cdn.sqhk.co/pagupuxu/jiODEjh/joditisixo.pdf
    • https://zaroralovez.weebly.com/uploads/1/3/0/8/130814195/zokikunakumefofe.pdf
    • https://cdn.sqhk.co/fipufose/BDijVur/29233007923.pdf
    • http://gizigevom.mygamesonline.org/80461031908.pdf
    • https://tivelagazevuw.weebly.com/uploads/1/3/4/1/134131505/xeleta.pdf
    • http://bukobaxaz.getenjoyment.net/what_is_artificial_propagation_in_plants.pdf
    • https://cdn.sqhk.co/gijesali/gibMg3v/urgent_care_sunrise_highway_sayville.pdf
    • http://govuled.mywebcommunity.org/anatomical_snuff_box.pdf
    • https://zesaxigupube.weebly.com/uploads/1/3/4/0/134016892/wunuk-mafagaginet.pdf
    • http://munasimowijuxi.getenjoyment.net/biw_design_guidelines.pdf
    • https://cdn.sqhk.co/nifodotiriru/dpWmaNL/radio_hit_fm_online_romania.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/f455545d-9136-449b-b095-fa9aced929fa/is_there_going_to_be_a_dork_diaries_16.pdf
    • https://uploads.strikinglycdn.com/files/bab6cbb4-b2ee-4287-bf7f-2eee9daa0214/dowejurerekotevipujupakem.pdf
    • http://jaminuzifibe.onlinewebshop.net/81969898446.pdf
    • https://uploads.strikinglycdn.com/files/80ae3ef0-a73d-4fe4-a8f3-bb02507a6116/hp_photosmart_c3180_check_print_cartridge_light_flashing.pdf
    • https://uploads.strikinglycdn.com/files/8571cd33-ca79-4586-8239-cd9db2e28799/black_and_decker_battery_hedge_trimmer_18v.pdf
    • https://uploads.strikinglycdn.com/files/64289eab-a019-4872-9ad7-80db7a2bd0ae/34366690502.pdf
    • http://kopolug.myartsonline.com/calendario_escolar_2019_y_2020_sep.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f906.bin
d39f665d981ab2c312a5569ce6da2b2fc1a2998e4fe46198cc170d081d30fcb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF906 5360 bytes
font_01_sfnt_off00010b2c.bin
aaf8aa3b5be4fb958e23668ad0f126c226244ab6c7ad8540f9cd6bac8bf70ed6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2C 10316 bytes

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