Malicious PDF — malware analysis report

Static analysis result for SHA-256 64d1d303b6319750…

MALICIOUS

PDF

77.6 KB Created: 2021-03-13 16:42:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 12b37dacc8256c376963b10f1ad6ea1b SHA-1: 267271964db9348c86ec2e1fe3c8399a43b290e4 SHA-256: 64d1d303b631975042990daa3ef065fd803801ad57335dedab23d32de698c94b
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or phishing attempt. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic indicate that the document is designed to redirect users to potentially harmful external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/aws?utm_term=rese%25C3%25B1a+del+libro+la+metamorfosis
    • https://cdn.sqhk.co/kufiremikaf/Chfhjje/sword_art_online_alicization_wallpaper_iphone.pdf
    • https://cdn.sqhk.co/wozokagad/qVgficA/bachelor_point_full_natok.pdf
    • http://reduslim-shopofficial.site/91015418595w2so8.pdf
    • https://cdn.sqhk.co/kadeposamo/TlF0gcZ/e_news_hosts_daily_pop.pdf
    • https://cdn.sqhk.co/jumosanex/uZ7HXgf/download_game_home_design_caribbean_life_mod_apk.pdf
    • http://the-english-temple.com/958664283yo3gi.pdf
    • https://cdn.sqhk.co/pesegozod/ArnTifa/85216949909.pdf
    • https://cdn.sqhk.co/kojupiloxifi/1r6jgtx/50790877481.pdf
    • https://cdn.sqhk.co/befozaxulot/jaaghiK/autotrader_florida_cars_for_sale.pdf
    • https://lunafegosewexik.weebly.com/uploads/1/3/5/3/135351611/3152196.pdf
    • https://cdn.sqhk.co/wogirujut/jfjex26/slingshot_car_price_new.pdf
    • https://babapijolirex.weebly.com/uploads/1/3/1/4/131409508/waretexubapi_lakudodokapona_kutaka.pdf
    • https://cdn.sqhk.co/tajavujexiz/cichfgc/apache_poi_sheet_documentation.pdf
    • https://cdn.sqhk.co/gegenosuzun/ahcgfhd/kim_kardashian_hollywood_mod_apk_iphone.pdf
    • https://cdn.sqhk.co/kasuvapexal/zghAjiY/blade_attacking_chinese_drama_wikipedia.pdf
    • http://i-men.ru/data_science_and_analytics_jobs_in_indiapuzhh.pdf
    • https://cdn.sqhk.co/kurotevu/5uMhhge/trap_adventure_2_speedrun_walkthrough.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/vunizi/sengoku_basara_ppsspp_19_mb.pdf
    • https://s3.amazonaws.com/nisiwanolom/topivifu.pdf
    • https://s3.amazonaws.com/bokofapig/adobe_air_para_pc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e14d.bin
7484c855a0298666e71b328360e0a0a4421a790efef62e49e9079f2fbfd722c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE14D 5096 bytes
font_01_sfnt_off0000f274.bin
823ac5f97f07a29c0709a00cdd035184c9b0998dd654b60b1774c381d3efc2db		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF274 11664 bytes
font_02_sfnt_off00011894.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11894 4324 bytes

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