Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0c64893bb9267af…

MALICIOUS

PDF

72.1 KB Created: 2021-05-14 10:02:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 2540238879eb0c02c9b2abe185987bde SHA-1: 2debf1503a0ecc5057a5055405ee947c47191594 SHA-256: c0c64893bb9267af6c53058aec062ff9956541404640df4fc9ce0a2d7e666273
126 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV and an ML classifier, and it contains numerous external URIs. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The embedded URLs, such as https://maypoin.ru/strik?utm_term=livro+mcmurry+quimica+organica+pdf, are likely used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/strik?utm_term=livro+mcmurry+quimica+organica+pdf PDF link annotation
    • http://tuvosudokalidu.scienceontheweb.net/kubernetes_architecture.pdfIn PDF document text
    • http://lakegefufen.scienceontheweb.net/xamorulefadazekid.pdfIn PDF document text
    • http://vaxisezawoged.scienceontheweb.net/kabadozofexut.pdfIn PDF document text
    • http://tagoturuluro.medianewsonline.com/paganini_caprice_24_viola.pdfIn PDF document text
    • http://ponaxamewimenul.sportsontheweb.net/how_to_reduce_into_smaller_size.pdfIn PDF document text
    • http://bogipeborowe.sportsontheweb.net/68237997207.pdfIn PDF document text
    • http://nebuxopav.mypressonline.com/morfologi_cacing_tambang.pdfIn PDF document text
    • http://zofugef.mypressonline.com/78717983727.pdfIn PDF document text
    • http://xisumagogali.getenjoyment.net/pt_cruiser_transmission_fluid_fill.pdfIn PDF document text
    • http://bekopomulasebi.getenjoyment.net/what_is_after_new_moon_twilight.pdfIn PDF document text
    • http://nafigunagofadab.getenjoyment.net/rujawakexisikaw.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
    • https://16e729f2-8c5c-4787-b670-14aeba6c5e03.filesusr.com/ugd/ac55e2_6c9d1f000a274c1b8c67f9613d801c24.pdf?index=trueIn PDF document text
    • http://likutolejit.onlinewebshop.net/mark_twain_books_list.pdfIn PDF document text
    • http://rorobuneki.epizy.com/63271557437.pdfIn PDF document text
    • https://010f2e21-25ca-4560-806d-08cbbb7c7db1.filesusr.com/ugd/74a852_7eb0c752bd06404bb5fd6f298f8a3000.pdf?index=trueIn PDF document text
    • http://vupaguriwedizid.atwebpages.com/center_for_patient_partnerships_madison.pdfIn PDF document text
    • http://pezamax.myartsonline.com/dalatebabina.pdfIn PDF document text
    • http://kopurelotalad.onlinewebshop.net/almased_shake_rezepte.pdfIn PDF document text
    • http://viwuwijagabote.myartsonline.com/azure_data_factory_v2_tutorial.pdfIn PDF document text
    • http://safinemawexow.epizy.com/assessment_methods_and_tools.pdfIn PDF document text
    • https://1ee34b3e-bfcb-4e25-b227-79ffd44eef10.filesusr.com/ugd/9d5096_3016f8fffc154403bfe13150887895e5.pdf?index=trueIn PDF document text
    • https://f608bf75-187c-4b28-9621-af925c05c2b6.filesusr.com/ugd/05e3ad_bf80f283b7aa40e3b80c2b9b5e825b80.pdf?index=trueIn 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_off0000cc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC19 5180 bytes
SHA-256: 87b6cafbbd92b8e083230a12c0a09e02deb7c3fc0e430db4a7152fc677a4e149
font_01_sfnt_off0000dd9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9C 11872 bytes
SHA-256: 738158f30e43ca54850ea418c2a641b4a8840f85f11d88063489e6bf997dd172
font_02_sfnt_off000102c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C1 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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