Malicious PDF — malware analysis report

Static analysis result for SHA-256 e717c7286f01a716…

MALICIOUS

PDF

91.5 KB Created: 2021-03-21 11:30:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 55f2061a5f9141d4ba84727def90e757 SHA-1: b6156c262e3e9ae01c33ce58a17eceb991425706 SHA-256: e717c7286f01a716e649b7df9db8842df2dd7a2b3f268084222171987ab9e307
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, flagged as a link farm. The ML classifier and ClamAV detection strongly indicate maliciousness, specifically a phishing or trojan payload. The embedded URLs, such as 'https://jumiwimov.ru/wix?keyword=morgan+box+truck+repairs', are likely used to redirect users to malicious sites. No scripts were extracted, but the PDF structure itself is designed to host and present these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jumiwimov.ru/wix?keyword=morgan+box+truck+repairs PDF link annotation
    • http://tejasatobes.medianewsonline.com/anticonceptivos_orales_2020.pdfIn PDF document text
    • http://lezigovedavide.getenjoyment.net/86124845997.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460677/normal_5fe2bdd9c7158.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381788/normal_6038dfff9a18d.pdfIn PDF document text
    • http://sopesukenapad.scienceontheweb.net/allium_sativum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468259/normal_60340bea9718d.pdfIn PDF document text
    • http://zabemaladameg.medianewsonline.com/renadojexono.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392652/normal_60449ba1cd1e6.pdfIn PDF document text
    • http://palopepidek.mypressonline.com/wifopiguba.pdfIn PDF document text
    • http://sotarebesowula.medianewsonline.com/canibalismo_humano.pdfIn PDF document text
    • http://dororuminaxa.mywebcommunity.org/mini_cooper_service_price_uk.pdfIn PDF document text
    • http://www.boxtruckrepairs.comboxIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8569cc17-8b2a-4187-ace0-95b0550b99f0.filesusr.com/ugd/d6eede_baeac8da9c9040158c6d08fa0270e87a.pdf?index=trueIn PDF document text
    • https://0ea28b16-58c2-472d-b6be-3e97fe9b7bb6.filesusr.com/ugd/696b8a_48e311e8b4d447028fe02703f3eaed6f.pdf?index=trueIn PDF document text
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_d45b95e874374be49c20d8af21397317.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jeponowon/salesforce_edit_report_folder_permissions.pdfIn PDF document text
    • https://c06d174a-caca-4ab2-b5a0-4525cd3135d4.filesusr.com/ugd/856cea_4244c9616ae9486c9d504a0c47dcf8e7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gapivegek/bexukusevilo.pdfIn PDF document text
    • https://s3.amazonaws.com/mejados/android_webview_assets_loadurl.pdfIn PDF document text
    • https://e0ff2378-281a-4ea3-95ae-419c526fdc99.filesusr.com/ugd/0baf77_daccd461b5054d3cb5517e096eb0c8fc.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kotodur/wwe_backlash_2018_theme_song_champion.pdfIn PDF document text
    • https://71e5fc8e-cc9a-4633-96c3-2c70acd464d0.filesusr.com/ugd/f08e01_1f167c87b0ee42df9e29bb60a675a9fb.pdf?index=trueIn PDF document text
    • https://fed4949e-3809-4fc0-a28b-84c5d390f589.filesusr.com/ugd/94482e_ada4cb22b47a4555a2f0490c552796dd.pdf?index=trueIn PDF document text
    • https://0e818273-c791-4c7a-b20f-750474b78fe4.filesusr.com/ugd/362633_ce26de9eba2e4ee89cb8d8519df0d915.pdf?index=trueIn PDF document text
    • https://6d706a39-1f93-4f1a-9423-caccf7e65e71.filesusr.com/ugd/69f91f_1147585bad364707a96b022f34a92fd7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/cricinformer_live_score.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_off000129e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129E4 5344 bytes
SHA-256: 51c0756936cc1bae4dbd46ee5141869a262c744b8cda523bcaf99b12b78c7d1f
font_01_sfnt_off00013c37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C37 10320 bytes
SHA-256: af5719cea9a79ee7f8ab0e09bdf9ce3b96b3c5f8b9960cfe3d4ad030b37f4a4f