Malicious PDF — malware analysis report

Static analysis result for SHA-256 66cca9c6ceefdf4f…

MALICIOUS

PDF

76.7 KB Created: 2021-02-03 02:59:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 91f4e084df9f6565973f296f089b3aa5 SHA-1: 729c58f02c0081805c877902e83fa4a0703fcc7d SHA-256: 66cca9c6ceefdf4fa4a311c7a5e2f4e5102d777eb93b38c862c4de8b4b46dc6e
192 Risk Score

Malware Insights

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

The PDF contains a lure related to 'account receivable aging report in quickbooks' and includes numerous embedded URLs, with at least one identified as a malicious redirector. The presence of multiple links on disposable hosting and the ML classifier's high confidence score indicate a phishing or malware distribution attempt. No scripts were extracted, but the document's structure and embedded links strongly suggest it's designed to trick users into navigating to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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/aws?utm_term=account+receivable+aging+report+in+quickbooks In PDF document text
    • http://fruitnaturs.space/world_conqueror_1945yfsps.pdfIn PDF document text
    • http://reform-st.ru/7176126142jay5z.pdfIn PDF document text
    • http://esclick.pro/abiword_ventajas_y_desventajaslyfsj.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/h8gjRYH/open_asus_laptop_battery.pdfIn PDF document text
    • http://vumilopevakidom.iblogger.org/adblock_plus_chrome_mac.pdfIn PDF document text
    • http://vvvvvvvvvvvvvvvvvvvvvb.xyz/id_rather_be_me_sheet_music_scribd1rif5.pdfIn PDF document text
    • http://merulabodonulu.iblogger.org/guidecraft_kitchen_helper_gray.pdfIn PDF document text
    • http://reactivascotia2020.com/sokovavilkp5i.pdfIn PDF document text
    • https://xowunaxevome.weebly.com/uploads/1/3/4/6/134679103/6a87959.pdfIn PDF document text
    • https://cdn.sqhk.co/kulukopupiw/Yjhyhcp/92371276650.pdfIn PDF document text
    • http://trokot-online.xyz/angelus_silesius9acrw.pdfIn PDF document text
    • https://cdn.sqhk.co/texafikogot/jf7jiaR/stumbled_across_my_strength_meaning.pdfIn PDF document text
    • http://sendgrid-de.com/73342364953629d3.pdfIn PDF document text
    • https://lemoxubasox.weebly.com/uploads/1/3/4/3/134329143/gawowewedib-rotibelatefoxa.pdfIn PDF document text
    • http://studyweb.site/planetcraft_block_craft_mini_world_3du1alu.pdfIn PDF document text
    • http://powerpoint4you.ru/the_zombies_are_coming_to_townake1s.pdfIn PDF document text
    • https://cdn.sqhk.co/meradipuwiz/TCJAluQ/zotikazepakakaru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zarazemudaseri.epizy.com/trinity_catholic_high_school_woodford_green_uniform.pdfIn PDF document text
    • http://godutiliwaganos.rf.gd/23842892788.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_off0000ee29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE29 5480 bytes
SHA-256: 88e569fbe8c16f481fe8588d31703a4a65e814f78868b37c313e8ac8e5472f53
font_01_sfnt_off000100dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100DC 10764 bytes
SHA-256: cb2058c862018a72699d17e5ba930ef6ff38c06f3b11a727f78b62186116e6cb

Open this report in the interactive analyzer, or submit your own file for analysis.