Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3e208edce3c7bb0…

MALICIOUS

PDF

81.4 KB Created: 2021-03-24 05:56:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 86db80f3c873dfd97c2aaf878d07021e SHA-1: af8dbc9390bd6298bde0471983aa77f660e2250f SHA-256: e3e208edce3c7bb0ea27dce8b2ce3bf1b05671d711f44764a0b4a0ffa04b952a
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it contains a large number of external links, many pointing to disposable hosting, suggesting a link farm or phishing operation. The embedded URL `https://maypoin.ru/strik?utm_term=how+hard+is+the+hike+to+the+wave` is a primary indicator of this malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://maypoin.ru/strik?utm_term=how+hard+is+the+hike+to+the+wave PDF link annotation
    • https://bufudelazevel.weebly.com/uploads/1/3/4/7/134734798/muvedoragobejefomam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464078/normal_6043ed1c94cc2.pdfIn PDF document text
    • https://kukanoli.weebly.com/uploads/1/3/4/6/134641169/panutuvijenu.pdfIn PDF document text
    • https://wepusiviji.weebly.com/uploads/1/3/4/6/134661614/95927.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490746/normal_6005a3bb3ab64.pdfIn PDF document text
    • https://vugadeji.weebly.com/uploads/1/3/1/4/131406436/julofugaxuwo-kiputefuki-wedabudoxedob-lutunepog.pdfIn PDF document text
    • https://zuzivosojix.weebly.com/uploads/1/3/0/7/130775151/nigufafo.pdfIn PDF document text
    • http://maxobujixeweden.sportsontheweb.net/62578760358.pdfIn PDF document text
    • https://xetasigebe.weebly.com/uploads/1/3/4/4/134443645/gadawisusefawetibi.pdfIn PDF document text
    • http://jotusimemirido.sportsontheweb.net/dinekol.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408190/normal_5fc8016233f18.pdfIn PDF document text
    • https://sezibuginodeso.weebly.com/uploads/1/3/4/4/134470526/257d3568e524.pdfIn PDF document text
    • http://nazorizuz.medianewsonline.com/52073418046.pdfIn PDF document text
    • https://kolojadulosa.weebly.com/uploads/1/3/1/3/131397946/nanegekobakuwa-memas-jazuza-denadatinon.pdfIn PDF document text
    • http://mezeferatitora.scienceontheweb.net/cabral_l._m._b._introduction_to_industrial_organization.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/508add6b-c6f9-4a70-8022-d27d3a3b35cc/jorasonuxowilaxasova.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1911f2a3-40af-41a5-9af1-88a4201869c6/tropic_of_cancer_passes_through_indian_cities_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/029be0b1-6fd8-4520-a230-265586ffe8ec/diwebixogubifagunafolo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67b9bc3c-3a68-46e8-82fb-c2bb87105965/mazobulusedemiliben.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e73bec1-53e4-403d-98d6-fe15fab5e264/suzutazup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d330738b-47df-4e49-89cb-9041b0759499/are_they_making_a_percy_jackson_series.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67a9ca7f-5643-4bf1-a924-1d2535e0d1da/32546286323.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2ae482f-5348-44ba-ac4c-6fc0ce80f8f2/2003_saturn_vue_v6_engine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28baa3c6-4440-47dc-9309-2db83256c6da/61125971776.pdfIn PDF document text
    • http://sabixukavizom.myartsonline.com/lenin_materialismo_y_empiriocriticismo.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_off0000fee2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE2 5060 bytes
SHA-256: 41351c5e67236f147126285c2bae554faa74e0ec7a182828f3d1ba783fee426d
font_01_sfnt_off00011022.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11022 11196 bytes
SHA-256: a34b23a92b583f858db656d73e51529743448f66268cab86305ae2fa583b491b