Malicious PDF — malware analysis report

Static analysis result for SHA-256 08cd6f5ffed65e53…

MALICIOUS

PDF

129.6 KB Created: 2021-05-16 22:00:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 14a7f1fda6ef4a67d36771e1f9ce82b6 SHA-1: 9e4f6107f6e8037ef279b93ac8fa7b881bce5d76 SHA-256: 08cd6f5ffed65e53182401f303fa0b5474ff77a3c7404133da5f6df807757408
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=gandhi+quotes+on+self+reliance+in+hindi PDF link annotation
    • https://cdn.sqhk.co/bozawenibiwa/WESicDX/kiss_of_war_advertisement.pdfIn PDF document text
    • http://merexazumebenag.medianewsonline.com/sidedupegorenagixexebik.pdfIn PDF document text
    • https://gatilesajegume.weebly.com/uploads/1/3/1/0/131070678/5456999.pdfIn PDF document text
    • https://cdn.sqhk.co/dilujuzaga/gjghgIO/street_fighter_2_multiplayer_online_game.pdfIn PDF document text
    • https://gabonavokelog.weebly.com/uploads/1/3/4/6/134684269/86bd97be9a.pdfIn PDF document text
    • http://woberate.getenjoyment.net/medical_terminology_mcq.pdfIn PDF document text
    • http://zuzavepojul.mygamesonline.org/libros_para_aprender_ingles_intermedio_gratis.pdfIn PDF document text
    • http://fumizudo.sportsontheweb.net/what_are_some_greek_and_latin_suffixes.pdfIn PDF document text
    • http://malanefire.sportsontheweb.net/78233409818.pdfIn PDF document text
    • https://cdn.sqhk.co/xulawajikigi/jj6Nibb/faforaxurotekigupagotuvow.pdfIn PDF document text
    • http://sozaxesugoj.mywebcommunity.org/pectoral_muscles_anatomy.pdfIn PDF document text
    • https://wosabawa.weebly.com/uploads/1/3/5/3/135390578/1871583.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/07eda721-91a6-418e-9782-2fb698d2f9b7/2781721800.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eabe00ab-77f2-4dd2-a8a5-7dbfca4499ef/the_game_tv_show_cast_brittany.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01d2d910-fee4-4b1d-92b5-48f4a453bea7/cant_install_adobe_acrobat_pro_dc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4228f05-376f-4666-9224-26551f67212f/fupiwabamuro.pdfIn PDF document text
    • http://zaduzos.myartsonline.com/definition_of_business_research.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09a23db1-5ec8-4b3f-97a6-ee0485c7595d/bokizawun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86f8ba81-4fd4-423e-8a91-b5f361e8afc3/xuwuzoritedukuzatigo.pdfIn PDF document text
    • http://fazegujopazoj.atwebpages.com/adjetivos_positivos_y_negativos_en_ingles.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_off0001bf7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF7C 5264 bytes
SHA-256: 319c60fd4918451dba7eb9b6db69ed1fa29c57fdfe7892a2921969a1effdf3cb
font_01_sfnt_off0001d159.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D159 12016 bytes
SHA-256: 6c9e2d9f0c85c0edcf567ad09a7d0cd4cbf20e1bac2d239e0de8724e5fae3be6