Malicious PDF — malware analysis report

Static analysis result for SHA-256 45daa7706e6e1a8c…

MALICIOUS

PDF

77.1 KB Created: 2021-03-05 19:22:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 040478c2934101d97a1eff9b9763a4dd SHA-1: 43f05ec4d796a8e951712391da096d5f3c9ad624 SHA-256: 45daa7706e6e1a8cf078e0b5e4f091d26a3a010e845f653887cc045c51348de6
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing campaign. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect users to malicious sites.

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://gimoguvi.ru/aws?utm_term=ddo+monster+saves PDF link annotation
    • http://mizebojusur.mypressonline.com/on_the_misery_of_the_human_condition_meaning.pdfIn PDF document text
    • https://latapelubatute.weebly.com/uploads/1/3/5/9/135960370/wuposemedorena_wezug_nunewo.pdfIn PDF document text
    • http://warupipujamoru.sportsontheweb.net/metodos_y_tecnicas_de_recoleccion_de_datos_estadisticos.pdfIn PDF document text
    • http://fasekafalig.scienceontheweb.net/disagesidut.pdfIn PDF document text
    • http://vekisonoloze.sportsontheweb.net/how_to_set_daylight_savings_time_on_casio_tough_solar.pdfIn PDF document text
    • http://sijubuwejipamun.mywebcommunity.org/jibotula.pdfIn PDF document text
    • https://bijimuxe.weebly.com/uploads/1/3/4/8/134886115/dipenuxopavasudowi.pdfIn PDF document text
    • https://jopomewimedadi.weebly.com/uploads/1/3/4/4/134465277/rufexubizorar.pdfIn PDF document text
    • https://kemumapuvepuvi.weebly.com/uploads/1/3/4/3/134311950/415624.pdfIn PDF document text
    • http://vimobewawulipiz.mypressonline.com/32874133854.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/36c6384f-960d-4e6c-b95b-2667451fdb4c/96832521548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/244b49b2-f39e-4040-a60a-1fdf1efaf5f9/intertherm_furnace_parts_canada.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16fd3ed6-bea5-48ce-a393-9f57e7d570f6/22906876006.pdfIn PDF document text
    • http://fojosotum.myartsonline.com/how_to_put_mean_median_mode_in_excel.pdfIn PDF document text
    • https://4eff3ec4-d147-45d1-be73-876d9e1d0019.filesusr.com/ugd/efb3f0_4b529af948324fb6b8b0b7f64c1d69fa.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dfd31a41-6fde-4545-97d5-5fc11bc52a86/73108014391.pdfIn PDF document text
    • https://8d59741e-369e-44be-b01e-8fbcb09d2d01.filesusr.com/ugd/7cefa9_ebc89de8692e45b2ab57e66dc3e06c64.pdf?index=trueIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_3bcd14cb404740f3befb9b25a875faee.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/eaf1e39d-9344-47bd-a383-41af6587a24f/the_house_of_spirits_audiobook.pdfIn PDF document text
    • http://judiserod.onlinewebshop.net/kriya_yoga_initiation_india.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_off0000f353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF353 5000 bytes
SHA-256: 2845384daeb82ca401c78f804027c98fc6bf46a2378482ab66b68648d944fb18
font_01_sfnt_off00010442.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10442 10368 bytes
SHA-256: 6d505755f6ecb94d91f012f01c96fc61f10eaa80d577250e65f747ba43dc3078