Malicious PDF — malware analysis report

Static analysis result for SHA-256 e31de66200a7d997…

MALICIOUS

PDF

77.5 KB Created: 2021-05-02 08:28:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d15c46d29023f448c85c58f4d5c95060 SHA-1: 144c56aa4f1fd22a0a2c575f4dbacaea5af33d92 SHA-256: e31de66200a7d99788fabd07e8df29bbbcecdc8c1d4cbafe399ba98bb7df3071
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-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://resalured.ru/strik?utm_term=storm+front+the+dresden+files+book+1 PDF link annotation
    • https://cdn.sqhk.co/veletafi/g8ghT0l/momituzotele.pdfIn PDF document text
    • https://cdn.sqhk.co/gewewoturila/EzhcifQ/big_time_cash_make_money_free_mod_apk.pdfIn PDF document text
    • https://siraxaroxaran.weebly.com/uploads/1/3/1/4/131483069/4113192.pdfIn PDF document text
    • https://cdn.sqhk.co/kelanadu/haW8heu/narcos_cartel_wars_mod_apk_2018.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/ja5hijd/85366610491.pdfIn PDF document text
    • https://cdn.sqhk.co/mikedeto/jdKgjwn/the_triplets_of_belleville_watch_online.pdfIn PDF document text
    • https://cdn.sqhk.co/gasupewu/iahjqhj/how_to_adopt_a_healthy_lifestyle_essay.pdfIn PDF document text
    • https://cdn.sqhk.co/xajamenujo/Smxbhh5/89222166273.pdfIn PDF document text
    • https://rajizoru.weebly.com/uploads/1/3/1/8/131856770/7199338.pdfIn PDF document text
    • https://tekuxarutupun.weebly.com/uploads/1/3/0/7/130775258/4f39d1bfb102.pdfIn PDF document text
    • https://cdn.sqhk.co/gogerazina/ihgFQij/cbse_board_class_9_english_book.pdfIn PDF document text
    • http://trastqort.online/the_way_of_the_world_summaryvqfkf.pdfIn PDF document text
    • http://mif-smeh.space/line_6_spider_jam_reviewtcvup.pdfIn PDF document text
    • https://cdn.sqhk.co/ravusigi/hbBIkhi/12264175251.pdfIn PDF document text
    • https://cdn.sqhk.co/moxawitab/zhdj2gf/sneaky_zombie_hero_pvz.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/pisedij/toshiba_dp5022-sd_user_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/55773976934.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_off0000f25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF25D 5296 bytes
SHA-256: d8a6a0701927bff5aeb97ac68cde9403f4e94e3fb6e6466d9a9407dd10ff05cc
font_01_sfnt_off00010437.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10437 10788 bytes
SHA-256: c5380e4f808fd8b7fa155e6ccd5b7719b2b478385fff8917d41187b4791eb108

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