Malicious PDF — malware analysis report

Static analysis result for SHA-256 9421069a3c64ff4e…

MALICIOUS

PDF

111.2 KB Created: 2021-06-07 13:21:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 269be732998400ea305a00eb18b58a0e SHA-1: 03c959ff61fe00b67f67fe211b33172669bcfd7f SHA-256: 9421069a3c64ff4e7051ebb829df78f73348858fe891658e0cc14e58222e29f4
186 Risk Score

Malware Insights

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

This PDF file exhibits characteristics of a link farm, containing numerous external links to various websites, many of which are hosted on disposable domains. The primary URL, 'https://krisoc.ru/pbw?utm_term=la+vida+breve+de+sabina+rivas+pelicula+completa', suggests a lure related to movie search results, likely intended to redirect users to malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://krisoc.ru/pbw?utm_term=la+vida+breve+de+sabina+rivas+pelicula+completa PDF link annotation
    • https://luvikexixof.weebly.com/uploads/1/3/4/4/134481561/8807947.pdfIn PDF document text
    • https://falijufik.weebly.com/uploads/1/3/5/3/135349852/3eb9d.pdfIn PDF document text
    • https://mixozanuzobese.weebly.com/uploads/1/3/5/4/135400893/bowuniso.pdfIn PDF document text
    • https://lawepisofav.weebly.com/uploads/1/3/4/4/134473025/zedewa.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
    • http://mituxap.pbworks.com/w/file/fetch/144423831/imtoo_video_converter_ultimate_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/165ca5d2-5212-43da-8c09-5e9b55577566/julufogaxisapolo.pdfIn PDF document text
    • http://bofamawetodo.pbworks.com/f/why_use_a_balance_sheet.pdfIn PDF document text
    • http://jobagej.pbworks.com/f/purity_authorisation_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c7eb5d1-45d9-423e-9db7-89070e13dbad/53870746729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87f39d23-8b28-4d13-99d7-54192d56696d/fijibazironikipof.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f543b413-0d6b-4bb5-ae40-0efa36853b11/xurafominumiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e9967d2-2b32-4c03-8789-1fd2fa2df325/biology_textbook_college.pdfIn PDF document text
    • http://pazimonofe.pbworks.com/f/9220416268.pdfIn PDF document text
    • http://tiduxikuve.pbworks.com/f/accounting_salary_guide_robert_half.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98999aea-1f79-4a3e-b12e-aa75b5597647/29733860162.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44f248ef-c20d-4508-b188-9e6d82e9218d/ford_mustang_mach_1_price_1969.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/09ea1ea9-da28-4c49-b444-a7de6c31d0f9/the_laws_of_spirit_world.pdfIn PDF document text
    • http://pakesobiroge.pbworks.com/w/file/fetch/144532572/mujhse_dosti_karoge_full_movie_indonesia_subtitles.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014ff6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14FF6 5240 bytes
SHA-256: b454a2f7da63ca641224ee096080f46f10824c0ef3e30594420347cfbe32513b
font_01_sfnt_off000161ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x161AB 12324 bytes
SHA-256: 9e35c5c0d8d76f159c2262d744cc5bc7a655a0fbaac2118bf56bbbc4977daea0
font_02_sfnt_off000189d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189D1 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd
font_03_sfnt_off00019efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19EFE 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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