Malicious PDF — malware analysis report

Static analysis result for SHA-256 9243917e6848349d…

MALICIOUS

PDF

71.0 KB Created: 2021-06-07 12:48:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 727b1173b8a5915d37f8a302295c9e3c SHA-1: c902033f810134c054810abe876964a0b05a71ea SHA-256: 9243917e6848349d3c689e015ccf36f9057062b9c452bec8c9a62b9350797168
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting services, and a heuristic identified it as a link farm. The document body, though heavily obfuscated, suggests a lure related to CCNA exam costs. ClamAV and ML classifiers also flagged this PDF as malicious, likely due to its phishing and redirection capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://nomylo.ru/pbw?utm_term=how+much+is+the+ccna+exam+2020 PDF link annotation
    • https://fozunisomizu.weebly.com/uploads/1/3/4/6/134666093/47aabad6.pdfIn PDF document text
    • https://wamibujobaju.weebly.com/uploads/1/3/4/7/134716207/nuwexikatenutijuxu.pdfIn PDF document text
    • https://peramixirado.weebly.com/uploads/1/3/1/6/131637131/2da3fdf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382620/normal_60558e876321b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384295/normal_6008c28e4325e.pdfIn PDF document text
    • https://jozipomona.weebly.com/uploads/1/3/4/4/134479443/8750577.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451033/normal_6052182b1aa88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388280/normal_5fdbfac60f2d8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415534/normal_5fdedd316ba91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369907/normal_601b435fca31b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4461205/normal_5fc8112183ace.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zekapotog.pbworks.com/w/file/fetch/144721542/vositeradoxowuledefof.pdfIn PDF document text
    • http://magogopowo.pbworks.com/w/file/fetch/144738633/gazuwukawulasaruwemovo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00d6c624-adf9-4e1f-9d9e-7dc4c14ca607/65264788116.pdfIn PDF document text
    • http://supijexed.pbworks.com/w/file/fetch/144779673/gogipuvevitoxesew.pdfIn PDF document text
    • http://kedetuwi.pbworks.com/f/83043119165.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66cddcdf-03d5-48fc-98ae-1846c8627265/study_guide_for_technical_analysis_explained_by_martin_pring.pdfIn PDF document text
    • http://tebejeloxid.pbworks.com/w/file/fetch/144424191/how_to_emcee_a_7th_birthday_party.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7c4c67ef-882d-4356-ab64-6f59a25cf0fc/walmart_maternity_leave_policy_canada.pdfIn PDF document text
    • http://fubajulak.pbworks.com/w/file/fetch/144426147/temekaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ac072e4-f5a7-4b9e-9215-00767651fc32/10648978484.pdfIn PDF document text
    • http://sakulibur.pbworks.com/w/file/fetch/144696306/descargar_cleo_4_para_gta_san_andreas_pc_windows_7.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_off0000d779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD779 5304 bytes
SHA-256: 8ca61ed1d847a967c5d9fdaa9ca9394ef9589f21c2a12170f3cb5d67702fe4aa
font_01_sfnt_off0000e973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE973 11040 bytes
SHA-256: ed7ef5b2dbe097b2a1905026ad007b451d29487eb297de59a8a4ca59fd2a564b

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