Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b5ef643ff1df79b…

MALICIOUS

PDF

75.8 KB Created: 2021-03-22 00:23:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 8dc1d044d92a70f3b3d36b557716aca4 SHA-1: 22c1989562e0c07bca377bfa01a0533e9e6f6425 SHA-256: 3b5ef643ff1df79b1c89df5d09d9fe6cf95edfb25b8189761da8c02599768cb5
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm or phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or phishing pages. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://vilenefex.ru/123?utm_term=fsc+balochistan+board+date+sheet+2019 PDF link annotation
    • http://ruvujagefeko.mygamesonline.org/how_many_miracles_in_the_new_testament.pdfIn PDF document text
    • http://konujojijitezu.iblogger.org/reforma_anglicana_uma_igreja_nacional_na_inglaterra.pdfIn PDF document text
    • http://kidunotofonaxiz.22web.org/journal_articles_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lojosikol.epizy.com/admissions_scert_odisha_deled_admit_card.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/zunafomutesagojagoxebe.pdfIn PDF document text
    • https://75e6d08a-b14f-4c2c-bd4e-3e6431d9d11c.filesusr.com/ugd/497a87_cece915847914468ae6305844314c45e.pdf?index=trueIn PDF document text
    • http://gafigap.epizy.com/mathematics_syllabus_for_jhs_2020.pdfIn PDF document text
    • http://woporebokut.rf.gd/69149760603.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a16e8cae-b857-4922-be11-70d45e015113/what_are_the_hidden_trophies_in_rdr2.pdfIn PDF document text
    • http://pizubape.rf.gd/types_of_rapid_diagnostic_test_for_malaria.pdfIn PDF document text
    • https://0eaabcdb-938a-45a6-85a3-1a7d796bbcdd.filesusr.com/ugd/8d6d25_e2f076d2ee1a4f4f97ab1faff649b4d7.pdf?index=trueIn PDF document text
    • http://xezujuwevan.epizy.com/30066121688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d0efb33-60db-4d9a-aae5-ea996b6f2fff/2271668234.pdfIn PDF document text
    • http://xewajube.epizy.com/tazogamusijavobe.pdfIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_07a5b9e14c9b4d8b8d775f026c85bb41.pdf?index=trueIn PDF document text
    • http://gonurorirezode.epizy.com/english_speaking_practice_software_free_download_for_windows_7.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e16a5367-a275-4508-85f7-ed6261f493fc/keystone_kstad70b_dehumidifier_reviews.pdfIn PDF document text
    • http://xoxozuzupa.rf.gd/30915442968.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e3586453-bd8e-42ca-b363-74ae51ad67f7/11370644267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50c0db08-931d-49ca-8665-b7a04ccd4608/how_to_connect_wii_remote_to_dolphin_without_bluetooth.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_off0000ea84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA84 5604 bytes
SHA-256: 1b027d1fae03d4afc7e9f16b6e3e6cfdcfd42cac9a310a978b2697878f5ee653
font_01_sfnt_off0000fd85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD85 10540 bytes
SHA-256: 8f8ea4da3fc2d8d630c4e7f0a94969c01b98c5811144ef6377b775754146fb03

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