Malicious PDF — malware analysis report

Static analysis result for SHA-256 36052695ae7931a6…

MALICIOUS

PDF

75.7 KB Created: 2021-05-15 05:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 66f2d6812ae4e72aaf6569faf31e0c76 SHA-1: 403007b58fe6fcdf5f841d4789f7c2b97469c66a SHA-256: 36052695ae7931a6372d5f6e36f5364511d1617b533eb10a564901397c6684dc
244 Risk Score

Malware Insights

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

This PDF file was identified as malicious by multiple heuristics and ClamAV, indicating it is likely a phishing or malware distribution attempt. The file contains a large number of embedded links, many pointing to disposable hosting, and at least one link to known malicious infrastructure. The primary lure appears to be related to stock market information, as suggested by the URL parameter 'what+do+candlesticks+represent+in+stocks'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 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.
  • 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.
  • 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=what+do+candlesticks+represent+in+stocks In PDF document text
    • https://cdn.sqhk.co/zavipudajose/ifYic3T/administrator_duties_and_responsibilities.pdfIn PDF document text
    • https://cdn.sqhk.co/xexisini/qBF1ihh/zoboduxokebotabixalolate.pdfIn PDF document text
    • http://dotixomovi.sportsontheweb.net/mnps_calendar_2020_20.pdfIn PDF document text
    • http://tigitaja.iblogger.org/a_history_of_islamic_law_coulson.pdfIn PDF document text
    • https://cdn.sqhk.co/kidatufo/djaQJhe/nesuzeberiga.pdfIn PDF document text
    • https://cdn.sqhk.co/lomekojop/iihhemy/football_manager_2020_mobile_tactics.pdfIn PDF document text
    • https://cdn.sqhk.co/bofozuto/gigihgG/tool_kit_for_home_with_drill_machine.pdfIn PDF document text
    • http://lodulumadumaka.22web.org/ps_i_still_love_you_song_in_trailer.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://044e8d80-c429-4a1f-820d-9b443c65b389.filesusr.com/ugd/53c654_661716daec134797928685da9d2b8626.pdf?index=trueIn PDF document text
    • http://kijonag.onlinewebshop.net/articles_about_school_rules_and_regulations.pdfIn PDF document text
    • https://ac402fee-74f4-49a6-b5a4-6a03c6a057de.filesusr.com/ugd/b0cd75_a9ca4758f9404018b049bae31361d578.pdf?index=trueIn PDF document text
    • https://8d537faf-e869-4ed9-a29f-988560fab1dc.filesusr.com/ugd/0cce51_8c0e376d3d454451965869f57c175099.pdf?index=trueIn PDF document text
    • https://0e733887-fd72-4d21-8b10-0a39cafbc931.filesusr.com/ugd/1e4d10_f0079bd41ad94af28223f8e3a770441a.pdf?index=trueIn PDF document text
    • http://tudugir.atwebpages.com/diamond_point_bow_tie_pattern.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99e649a6-a260-4c43-aac5-0673daab56a5/sowafumobowija.pdfIn PDF document text
    • https://99516632-72ce-40f3-a9a1-a01c91361c65.filesusr.com/ugd/e42c35_b620da0e99fa4657ac96ec02307bb428.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/fa0d3d4e-14f3-467d-96b2-9f08bd3eb3ed/10171193620.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_off0000e9a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A0 5236 bytes
SHA-256: aaf000e0b0d982bee1fd38eb13887ae11f7ba07314e6f62890b48e8ceb5ad410
font_01_sfnt_off0000fb77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB77 10640 bytes
SHA-256: 1e2fe368a7ff456a57e94d74c22355d61923e7469c469c12dde5d32f065bdb67