Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0d0ef63c59f973e…

MALICIOUS

PDF

84.2 KB Created: 2021-03-21 04:17:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3ff9243dc583156e09a366116f7511c1 SHA-1: 2d97b79b2b7f5623e805d6ffd2dc59d0a45bfe8d SHA-256: f0d0ef63c59f973e53ee8b30ff42d34e7cf70bea13cff245d42cd26311f37850
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, indicating a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The document body, though heavily obfuscated, appears to be a lure related to search queries, directing users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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://zajinet.ru/strik?utm_term=does+disney+plus+have+the+marvel+movies+in+order PDF link annotation
    • https://tamukatiraf.weebly.com/uploads/1/3/4/7/134766395/5209546.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402247/normal_60197aa2d3b65.pdfIn PDF document text
    • https://vejarava.weebly.com/uploads/1/3/1/0/131070596/6214549.pdfIn PDF document text
    • http://runmasten.online/93294990734k5o1t.pdfIn PDF document text
    • http://uscreditmonitoring.info/14848411573rm6bn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450243/normal_6044615d58dd5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466664/normal_60275126d1318.pdfIn PDF document text
    • https://fexupewoxi.weebly.com/uploads/1/3/4/6/134619994/579cbdaad6a21fd.pdfIn PDF document text
    • https://numetoximo.weebly.com/uploads/1/3/4/7/134717633/nexigekerulom.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367640/normal_5ff5c06adbe83.pdfIn PDF document text
    • https://fefokivaz.weebly.com/uploads/1/3/0/7/130776727/gubuwobaguk-bulojute.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460231/normal_5fdcce98a90ae.pdfIn PDF document text
    • http://kernig.pro/240213887761n88.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/dalava/renewable_and_nonrenewable_resources_worksheets_5th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/woneketelak/infosys_bpm_limited_annual_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/639a4259-69c2-4e8f-b415-ce3592ebf8e1/beckman_coulter_statspin_express_2_service_manual.pdfIn PDF document text
    • http://ganusigesu.rf.gd/grammar_activities_for_high_school.pdfIn PDF document text
    • http://nesitojogosew.epizy.com/92737197678.pdfIn PDF document text
    • http://zukevajisuw.rf.gd/my_boy_free_games_apk.pdfIn PDF document text
    • http://gezogiz.epizy.com/the_pardoner_s_prologue_questions_and_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6bdcb51-bb2c-4a33-a4e9-cb306e52a2c2/35949044682.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/537e6a78-dda0-4f3a-8491-081d16bea87b/new_testament_timeline_poster.pdfIn PDF document text
    • https://s3.amazonaws.com/semuxemakaw/how_much_money_is_j_prince_worth.pdfIn PDF document text
    • https://s3.amazonaws.com/megulu/vepowugajaxuvotawuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51d7fef4-86fb-4624-9ef7-d07614f37561/how_to_write_your_college_admissions_essay.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_off00010be2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE2 5360 bytes
SHA-256: 8112f11b23ad7629a6675e8880a3eb7f19f1dd9f24d9727f881bb4ea6a2e9dfd
font_01_sfnt_off00011e04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E04 10816 bytes
SHA-256: 1bd5f9779ae46553f00028d455dc086281993ce8fdb7ba6c58010ee67f09ba17