Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7920aa028f267fe…

MALICIOUS

PDF

70.4 KB Created: 2021-03-09 07:11:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: db447dae2a0e8644edec5e7d953fdb53 SHA-1: 0947e10142b15ee6ab51846d2545864d29094710 SHA-256: f7920aa028f267fee43de21e0e12ed7cece668bcb784d56d6756cc33c5709261
126 Risk Score

Malware Insights

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

The sample was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, with at least two pointing to suspicious domains ('ponafet.ru' and 'rowowesofazov.medianewsonline.com'), suggesting it functions as a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this, indicating the PDF is designed to host many links on disposable hosting. No scripts were extracted, but the PDF structure itself is used to facilitate the attack.

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://ponafet.ru/123?utm_term=analog+lab+lite+manual PDF link annotation
    • http://rowowesofazov.medianewsonline.com/96364089224.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/80309244575.pdfIn PDF document text
    • http://kumorepo.22web.org/61712392873.pdfIn PDF document text
    • http://kixurox.getenjoyment.net/34292831368.pdfIn PDF document text
    • http://pugorot.mygamesonline.org/lol_patch_10.24_download.pdfIn PDF document text
    • http://mozobadijoba.medianewsonline.com/bofavonumasupiku.pdfIn PDF document text
    • http://gasiwine.iblogger.org/macrocytic_anemia_guidelines.pdfIn PDF document text
    • http://fuzubijixulux.mygamesonline.org/pdf_to_word_converter_free_download_windows_10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sipariwemarisu.rf.gd/chevy_truck_parts_manual.pdfIn PDF document text
    • https://d1ee23ee-9ccf-45b0-80ef-1e1ff1f657c4.filesusr.com/ugd/9ef0c3_d3869aa240964528b2a7b9d38795a4cd.pdf?index=trueIn PDF document text
    • http://jabodegodonirad.atwebpages.com/dirt_devil_power_max_xl_walmart.pdfIn PDF document text
    • http://pufuruwesiva.epizy.com/what_is_the_best_baby_gate.pdfIn PDF document text
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_ff0ca88036e34115b1b9cb3561fd3727.pdf?index=trueIn PDF document text
    • http://rumajajoneder.rf.gd/division_facts_3_times_table_worksheet.pdfIn PDF document text
    • http://werawizanobekiz.rf.gd/vejazodulobub.pdfIn PDF document text
    • http://womutefipile.epizy.com/xonevukelekupogiju.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_off0000d8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C3 4860 bytes
SHA-256: 84d6fc8f390b62784c8558c7cbc19bbb29195040f89dd9f6d41de00325517511
font_01_sfnt_off0000e93e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93E 10604 bytes
SHA-256: 274db7b10cd7642b49b1b48744530bbd5964f4c9536a8bba2ef596c5d9ba3f68

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