Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f9f5afa7cf28134…

MALICIOUS

PDF

79.7 KB Created: 2021-03-11 03:24:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 2166429a445c923d44fa7679e450e86f SHA-1: fa216f23ebadfb251d966bde4a365c48bc54f944 SHA-256: 8f9f5afa7cf281349a2eb369163a3c271bb1183a316cff8bd878be8ad4e9f12d
176 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one prominent URL pointing to a suspicious domain that appears to be part of a link farm. The 'SE_CALLBACK_LURE' heuristic suggests a phishing or tech-support scam context, and the 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics confirm its malicious nature. While no scripts were explicitly extracted, the PDF structure and heuristics indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://dugedepap.ru/123?utm_term=filing+a+false+police+report+tn PDF link annotation
    • http://labifovejes.mypressonline.com/samsung_camcorder_hmx-f90_manual.pdfIn PDF document text
    • https://pipenibeteza.weebly.com/uploads/1/3/4/5/134508730/2901686.pdfIn PDF document text
    • https://lizameguxif.weebly.com/uploads/1/3/1/6/131606128/3281843.pdfIn PDF document text
    • https://webuseki.weebly.com/uploads/1/3/2/8/132814302/555043.pdfIn PDF document text
    • https://cdn.sqhk.co/wibepudib/jjDhagg/59843072075.pdfIn PDF document text
    • https://cdn.sqhk.co/mojesoje/ogEiejd/homonyms_worksheets_for_5th_grade_free.pdfIn PDF document text
    • https://cdn.sqhk.co/nuponoviva/hiibigo/fivegosite.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/gixawetopoli/607304144.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96d130b7-9e08-4ab0-a33c-a59625f7bfc6/maytag_bravos_washing_machine_error_codes_f51.pdfIn PDF document text
    • https://s3.amazonaws.com/memexelu/32067967759.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/49843667964.pdfIn PDF document text
    • https://s3.amazonaws.com/gotitibekovi/the_maze_runner_series_all_books.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/17923366288.pdfIn PDF document text
    • http://vubuzixefixa.onlinewebshop.net/67624960926.pdfIn PDF document text
    • https://s3.amazonaws.com/pululusodogi/96073250296.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/accounting_and_auditing_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dfaf697-aef3-4304-80a8-06320c3aa86b/wamoxoxure.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d34117a-9db9-468c-8764-69c11be7add4/pre_algebra_1_practice_test_with_answers.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e6bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6BB 5140 bytes
SHA-256: e2e78ec00f73b86f03d4ca439f91a7d67c85df2be91608952146d2a8872c5c53
font_01_sfnt_off0000f851.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF851 10724 bytes
SHA-256: 4225519058312517426d2f67ef042136d2aac5d3daf4d663e6b11426298de255
font_02_sfnt_off00011d39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D39 16028 bytes
SHA-256: 0bae8649ba252bcfab81cb8324cfe1737d73e47191b507e117e6d0858e0066a8

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