Malicious PDF — malware analysis report

Static analysis result for SHA-256 6caafd18419f6151…

MALICIOUS

PDF

74.5 KB Created: 2021-03-23 22:01:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 23d36d12d20cd704ab45ee39ff3e25c3 SHA-1: 26a24640ec850d928b7206af29726a27535d3da2 SHA-256: 6caafd18419f6151c45713b5dd3c3da9761366feeb4a44d3c366354d00fd497c
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to disposable hosting and are likely part of a link farm designed to redirect users to phishing or malicious sites. The presence of external URIs and the 'link farm' heuristic strongly suggest a phishing or credential harvesting attack pattern.

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 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://jumiwimov.ru/strik?utm_term=present+simple+present+continuous+exercises+pdf+esl PDF link annotation
    • http://nafarami.medianewsonline.com/how_long_does_wick_last_in_kerosene_heater.pdfIn PDF document text
    • http://jumufedug.22web.org/52795973752.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461761/normal_602fd5882925a.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/ijw9UqC/68267846543.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4529024/normal_603866789370b.pdfIn PDF document text
    • http://kafixerutatad.iblogger.org/mezowesa.pdfIn PDF document text
    • http://lejunuzegakikuv.mypressonline.com/ginabidexoximikosapajofaf.pdfIn PDF document text
    • http://sefegusekepuxa.mypressonline.com/chevrolet_beat_spare_parts_price_list.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/76986981857.pdfIn PDF document text
    • http://tuworiki.22web.org/retail_assistant_manager_resume_template.pdfIn PDF document text
    • http://mizeveba.22web.org/91860814364.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/9EUgicr/48952305823.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388160/normal_6024f66885e76.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://acfc0e76-311d-46af-9c13-f46c112eb424.filesusr.com/ugd/f90bad_4d9a65dd0876492692b227d32cbb6d00.pdf?index=trueIn PDF document text
    • https://df9240ce-57b4-430e-a582-521170ca5232.filesusr.com/ugd/10b03a_afde6debb3c5445b807f7265865737e5.pdf?index=trueIn PDF document text
    • https://67dbe094-6b68-4a2c-870f-9bd980043d88.filesusr.com/ugd/cff74a_bc941d8966be4f2e98606775e738c600.pdf?index=trueIn PDF document text
    • https://6131fb9f-3080-406c-a6ab-c4686b6a2f6f.filesusr.com/ugd/52be6f_beaaa37090b14fa8b05f2ecaa253f1ef.pdf?index=trueIn PDF document text
    • http://kirezizinubov.rf.gd/wd_my_cloud_login_forgot_password.pdfIn PDF document text
    • http://sulijugofogim.onlinewebshop.net/85656167110.pdfIn PDF document text
    • https://40052bae-d6b0-4be3-9c84-96956a804c69.filesusr.com/ugd/32907c_c871c87f62b1424e9bc03e2b5c6c8dff.pdf?index=trueIn 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_off0000e82d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82D 5160 bytes
SHA-256: 81248a8d141a59a31c7319358ff7c9827bc515601d5afb039d05c4628cccef5e
font_01_sfnt_off0000f9ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AB 10196 bytes
SHA-256: d2d7a867acce223dafa3ee3cfb915514cf9c5bcb1c414df79b115462b194f85f

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