Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e24f35491f69db…

MALICIOUS

PDF

92.9 KB Created: 2021-04-14 00:36:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f870d42ad0b17d59e5fb807b0f522fa3 SHA-1: d5d5ba6f4a558602b76f386a82701e1de4f6f3ff SHA-256: 02e24f35491f69db94b7fb22d58f1f52ce1dfeb4dadc3cdd54b2df79dd9430d3
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, indicating a link farm designed for SEO manipulation or phishing. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and numerous URLs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 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.
  • 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://jottigo.ru/strik?utm_term=honda+snowblower+hs928+parts+manual PDF link annotation
    • https://cdn.sqhk.co/neganobasiwe/heK1Tib/shankar_mahadevan_devotional_songs_naa_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/fapetemiji/igjifje/ganubomoxajewopi.pdfIn PDF document text
    • https://cdn.sqhk.co/miwavilusaji/E5gfjfk/driving_programs_near_me.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446030/normal_5fcd348368a2c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381997/normal_6036c7a4b75e3.pdfIn PDF document text
    • https://cdn.sqhk.co/laguladori/dakTZid/40854307187.pdfIn PDF document text
    • https://cdn.sqhk.co/vabalogu/ijDhfJq/47995711882.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383912/normal_5fda714043f7e.pdfIn PDF document text
    • http://zanovekolasin.mywebcommunity.org/canucks_schedule_2020_20.pdfIn PDF document text
    • https://cdn.sqhk.co/xolofiwano/fqK4hih/wexovemolijipav.pdfIn PDF document text
    • http://jixazepo.mywebcommunity.org/low_calorie_sweet_snacks_indian.pdfIn PDF document text
    • https://cdn.sqhk.co/bijozugetav/bsvidif/dosalulitujamofadinapal.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://vepitejususas.atwebpages.com/ielts_general_speaking_practice_test_with_answers.pdfIn PDF document text
    • https://4dd4a32c-aced-41d2-87e6-7ff9ca8080d7.filesusr.com/ugd/6d6f33_78748cca8c514387830f030f6c258816.pdf?index=trueIn PDF document text
    • http://lufiwivumijej.myartsonline.com/livro_bresser_pereira.pdfIn PDF document text
    • https://e5720c39-3c1c-4a52-9be9-509675281b5a.filesusr.com/ugd/0010c8_5bbe5dd173ec4f1d8412d5b9ec28fcee.pdf?index=trueIn PDF document text
    • http://badamowafe.onlinewebshop.net/99629797721.pdfIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/the_selection_book_4_kiera_cass.pdfIn PDF document text
    • http://fixidil.atwebpages.com/fotirakizasodesama.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011cb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CB0 5708 bytes
SHA-256: 38148462d49f05eace35346d3c05dda326643e6e8e0a756d46d086ad01d647e5
font_01_sfnt_off00012ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FF4 11384 bytes
SHA-256: a5902098e5daf5d987f8108d125df00a2e7d9e93c9cb3c9be8d2bdfdff79e695
font_02_sfnt_off000156b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x156B0 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378