Malicious PDF — malware analysis report

Static analysis result for SHA-256 77cc2897939899e8…

MALICIOUS

PDF

69.5 KB Created: 2021-02-20 05:51:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: eee2ae31840c98db3753f1df4dadb73c SHA-1: ac6f8e264ca47b4076fb2c853dd44c7e6ba76ba6 SHA-256: 77cc2897939899e8c32d79bd9d55661d3bc9fa22ef570aaee3a608b167c069a7
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 0.9997

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://crophysi.ru/strik?utm_term=netgear+wgr614v10+specs PDF link annotation
    • https://cdn.sqhk.co/bovokolel/1nghDIe/tippy-_tip_corner_meaning.pdfIn PDF document text
    • https://cdn.sqhk.co/xumesapaxoku/hijhaRm/black_friday_deals_best_buy_laptops.pdfIn PDF document text
    • https://cdn.sqhk.co/kokuxisa/bDAchjT/zoo_animal_kindergarten_activities.pdfIn PDF document text
    • https://cdn.sqhk.co/pepitaji/dfHjgGI/waptrick_real_football_games_2019.pdfIn PDF document text
    • https://cdn.sqhk.co/bomoxale/g7hhqih/transfer_news_today_twitter.pdfIn PDF document text
    • https://xidumalebuwun.weebly.com/uploads/1/3/4/8/134894794/fa5e53.pdfIn PDF document text
    • https://tusutaxuwipafu.weebly.com/uploads/1/3/4/4/134403355/eaa3fc6ed.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://begagebo.epizy.com/21754577231.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/ram_bhagwan_ke_wallpaper.pdfIn PDF document text
    • https://s3.amazonaws.com/jozetej/jajeran.pdfIn PDF document text
    • https://s3.amazonaws.com/jadere/43105414817.pdfIn PDF document text
    • https://s3.amazonaws.com/fajeloninesitel/intracerebral_hemorrhage_hypertension_guidelines.pdfIn PDF document text
    • http://zemofebu.epizy.com/what_does_refuse_to_believe_mean_in_greek.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_off0000d025.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD025 5628 bytes
SHA-256: 9d3107aaa7c32dd801b73545f43dff5d7f3cf23fa02dd591e58daf7453716c9a
font_01_sfnt_off0000e389.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE389 11264 bytes
SHA-256: c46cd0121c54f4e1384983de328c6b3644be410fd660132b56dbcb64e63cdf75

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