Malicious PDF — malware analysis report

Static analysis result for SHA-256 c75e9cd236e55e15…

MALICIOUS

PDF

79.8 KB Created: 2021-03-22 04:06:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: a4bdc5a8f8c7305806bb718a0a2781f8 SHA-1: 693310e042670388d71c343cbc8acd37829dc31c SHA-256: c75e9cd236e55e150891415c0925068a7483f6924d5d97296a0686ef2bb0b26e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a domain associated with phishing lures. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing site or download further malware. No scripts were extracted, but the presence of multiple external links suggests a social engineering attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/award?keyword=important+constitutional+amendments+for+upsc+pdf PDF link annotation
    • http://nunobuzipame.medianewsonline.com/kidoxoj.pdfIn PDF document text
    • http://anyita.space/chevy_cruze_2013_eco_6_speed_manual4wnb9.pdfIn PDF document text
    • http://devivitonewe.sportsontheweb.net/62079585232.pdfIn PDF document text
    • http://vevebopawo.mywebcommunity.org/44287479422.pdfIn PDF document text
    • http://tepafuvofes.iblogger.org/56961329181.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/how_to_lose_male_body_fat.pdfIn PDF document text
    • http://alcexpress3.xyz/which_university_are_open_for_2021_entryq2x0g.pdfIn PDF document text
    • http://fbcopyright-center.com/81724112150zp9cc.pdfIn PDF document text
    • http://kejoxemubogese.mywebcommunity.org/97360705663.pdfIn PDF document text
    • http://pewagupudasita.22web.org/fawowivag.pdfIn PDF document text
    • http://ziwusis.getenjoyment.net/adler_mannheim_spielplan.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sagisat.rf.gd/ios_13_public_beta_1.pdfIn PDF document text
    • https://c145ee04-3c3b-4786-8b94-e0511401b322.filesusr.com/ugd/de65f7_28feebb47192430182b99cc5884793b4.pdf?index=trueIn PDF document text
    • http://wumimed.rf.gd/98612182851.pdfIn PDF document text
    • http://tukuponuvul.epizy.com/71356284475.pdfIn PDF document text
    • https://0aa989e7-076c-475f-bc22-fff5ae310860.filesusr.com/ugd/b44be6_f46f88426da2461bbd460dea2f97636e.pdf?index=trueIn PDF document text
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_309e74e16270473da876368b58f7491f.pdf?index=trueIn PDF document text
    • http://gefuwaw.atwebpages.com/51433965760.pdfIn PDF document text
    • http://jurukukixinom.rf.gd/blue_is_the_warmest_color_movie_online_subtitles.pdfIn PDF document text
    • http://figopovu.epizy.com/7988253544.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_off0000fb19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB19 5236 bytes
SHA-256: 263a3d4f62e39840676cf239e97766fb3d9b404f6cc18a73fa5b8e9f7fc75742
font_01_sfnt_off00010cc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC8 10956 bytes
SHA-256: 5560474d31187c261ab0eb3462aef1b3650689d9708877f037c613930fae9f78

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