Malicious PDF — malware analysis report

Static analysis result for SHA-256 90b379aafc432e8d…

MALICIOUS

PDF

74.8 KB Created: 2021-02-16 16:50:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 61689d651e83511a94948597cb0bc99f SHA-1: 43d491d82d35237d8946dde09eaf227f92f02f82 SHA-256: 90b379aafc432e8de19e61084cd6e43ca05d22d68a0445fc956ba941e5b9489f
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with one heuristic specifically identifying a 'PDF link farm'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or SEO abuse. While no scripts were directly extracted, the PDF structure and numerous external URLs suggest an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://jottigo.ru/strik?utm_term=how+to+call+unemployment+washington+state PDF link annotation
    • http://mikrotikwizard.com/vebumijasirulodomiveld6kg.pdfIn PDF document text
    • https://palanufijerovas.weebly.com/uploads/1/3/0/7/130739221/mexibalevisinirod.pdfIn PDF document text
    • https://xaxexuwolak.weebly.com/uploads/1/3/5/9/135978614/govolovod.pdfIn PDF document text
    • http://smallita.space/flicker_free_serial_macum24t.pdfIn PDF document text
    • http://onlinetiser.website/lofapaweratiweferse8w0.pdfIn PDF document text
    • https://kenazago.weebly.com/uploads/1/3/1/0/131070597/3160233.pdfIn PDF document text
    • https://zorivaleguzovul.weebly.com/uploads/1/3/4/5/134596353/5705308.pdfIn PDF document text
    • https://bilewobadazape.weebly.com/uploads/1/3/2/6/132695578/tuvegotovigul.pdfIn PDF document text
    • http://triple-doska5.club/xinusefisufijali6y2gk.pdfIn PDF document text
    • http://vajogeboru.iblogger.org/ceramica_campaniforme_los_millares.pdfIn PDF document text
    • https://tusululobiwivet.weebly.com/uploads/1/3/1/1/131163859/8320546.pdfIn PDF document text
    • http://hurricane1.space/makigosezikisodexilazqv4ov.pdfIn PDF document text
    • http://helpcreditscore.info/punuzitaxerpxvh.pdfIn PDF document text
    • https://domazatavaxagit.weebly.com/uploads/1/3/0/7/130775902/4473309.pdfIn PDF document text
    • https://viwejidem.weebly.com/uploads/1/3/1/4/131406222/776bc75227.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/debamijizozexo/caaspp_practice_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/vuzotisenixava/impella_cp_insertion_post_test_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/sevoga/32586299922.pdfIn PDF document text
    • http://fipegaz.epizy.com/pafefodisoteni.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/metabolismo_de_aminoacidos_proteinas_y_carbohidratos.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_off0000e856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE856 5408 bytes
SHA-256: d99ed4b0c19e1fee206bbe5c49950c7966a8d757ad385daf4d985da0dceae654
font_01_sfnt_off0000fab0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB0 10244 bytes
SHA-256: bf55e307b07a5d6e091444a8e44dcd09edc32780d97c63ae3e0de4765e6f075e

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