Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a2d1a1e0e42ab9c…

MALICIOUS

PDF

87.7 KB Created: 2021-02-18 18:41:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 4d17785bfaec07369db7dd55a8a40741 SHA-1: 903603dc722d883a5f89a8e3c5ace77ab0f7dbe6 SHA-256: 2a2d1a1e0e42ab9cbddeece290c7001d0dfcd8b1109ba72936650e2e5575bfcc
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are hosted on suspicious domains and appear to be part of a link farm designed to obscure the true destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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://leonvi.ru/strik?utm_term=calendario+de+pagos+sep+2020+cdmx PDF link annotation
    • https://cdn.sqhk.co/zosurinipin/6a7Uhar/kefunom.pdfIn PDF document text
    • https://ferizovewop.weebly.com/uploads/1/3/4/8/134887996/bogegogipijixudo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452608/normal_6020ae3942107.pdfIn PDF document text
    • https://xevibobi.weebly.com/uploads/1/3/4/6/134683071/226e1b8.pdfIn PDF document text
    • https://cdn.sqhk.co/fenazijeguk/Bjducjb/66481995239.pdfIn PDF document text
    • https://cdn.sqhk.co/betewulo/iiIFjeS/warlings_armageddon_descargar_para_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_601be2df705ef.pdfIn PDF document text
    • https://baxawomegofagu.weebly.com/uploads/1/3/2/8/132815114/2316033.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4453551/normal_5fc5ab6b194fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/font_choco_cooky_format_ttf.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/lexique_developpement_informatique.pdfIn PDF document text
    • https://s3.amazonaws.com/nuselufuzo/raditogubet.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/42953654417.pdfIn PDF document text
    • https://s3.amazonaws.com/wolina/commercial_due_diligence_report.pdfIn PDF document text
    • https://s3.amazonaws.com/xefejevife/rixisolofapikosajijejogov.pdfIn PDF document text
    • https://s3.amazonaws.com/dudurat/foxit_reader_64_bit_gratis.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_off0000f833.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF833 3064 bytes
SHA-256: 0b5e2232e287906fa69f7cdc51ab19c8c92147b2e4fba8c5edcc65ed17d50ef2
font_01_sfnt_off000102fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102FE 5640 bytes
SHA-256: 94cfb03043276fcf13dff0da059472faed821a2e498d156bf21e42b9a6e5e981
font_02_sfnt_off00011619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11619 11752 bytes
SHA-256: 9e80f0b9304912e7134d7b1670309d5ed5fa5e465e0de10b78eb56ab255c034e
font_03_sfnt_off00013bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BFF 16036 bytes
SHA-256: 35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f

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