Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdd5b08535df4836…

MALICIOUS

PDF

75.4 KB Created: 2020-12-28 03:24:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 14a55e788774b6ac854e40ceecd61996 SHA-1: 122d696bb2b3c56e250bfbabbd46d1aa5fbd3960 SHA-256: cdd5b08535df48367231084207c603c934d0929fc5cddf606bdc91b84d8f07af
114 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The ML classifier and the PDF redirector heuristic strongly indicate malicious intent. The document's content, though heavily obfuscated, appears to be a lure related to bill payments, directing users to a known malicious URL. This suggests the file is part of a phishing or scam campaign, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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.
  • 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://cctraff.ru/strik?utm_term=entergy+mississippi+pay+bill In PDF document text
    • https://mufiwejugoj.weebly.com/uploads/1/3/4/3/134340856/f78d6d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424331/normal_5f98ebd8adeb2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369190/normal_5fbc3f9d7a2cc.pdfIn PDF document text
    • https://cdn.sqhk.co/kewudomavave/sVjfigA/mobile_security_antivirus_eset_apk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4475559/normal_5fe1ae7c4250d.pdfIn PDF document text
    • https://wogefusupe.weebly.com/uploads/1/3/0/7/130740138/bezowazejasugejaliz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423699/normal_5fa852cb42e07.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/VjSGibv/67111559837.pdfIn PDF document text
    • https://cdn.sqhk.co/dodirorip/igeNZ9q/sanicon_turbo_waste_management_system.pdfIn PDF document text
    • https://cdn.sqhk.co/mezutorixo/lcXjTgi/9153376661.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492250/normal_5fe90d6d83c3c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ccfa42b3-f220-422b-ba09-f68edfc78267/gefumigetetikavunusofewo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de26bf65-9671-4c95-aceb-9dd70c536742/amc_dine_in_movie_theater_west_orange_nj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/db54ae29-d602-4d3d-b608-15ad49e2e154/28235657359.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_off0000d44d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD44D 5336 bytes
SHA-256: 366df2bbc0be8299b207bafccd0ea82da3a131fbd3a9b18890596a736fdd1c2b
font_01_sfnt_off0000e668.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE668 11024 bytes
SHA-256: 161f3fece2119cf8a6938645ed2e9033d049cbc3c5e5a6d50028e595bfc9be52
font_02_sfnt_off00010be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BE8 16076 bytes
SHA-256: b302cc8f5f09e2795de20733a7353734804733c4090a8051bb0a1a62ee9fdce2

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