Malicious PDF — malware analysis report

Static analysis result for SHA-256 210d9b63abec7d0f…

MALICIOUS

PDF

78.2 KB Created: 2021-02-21 16:21:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 173571118d9e0563e1a139975883f56a SHA-1: f7be3a9ff3c4f6e2f88b6fb90096cd24465661c8 SHA-256: 210d9b63abec7d0fe09d395b6b8ef77712eb483defbe490a5f113d2809ed8ead
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, a technique often used for SEO manipulation or to redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded links suggest it's designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://seumenha.ru/strik?utm_term=adobe+premiere+rush+ios+price PDF link annotation
    • https://cdn.sqhk.co/poronujefino/dIcjcjh/best_ninja_movies_2018.pdfIn PDF document text
    • https://nojamatisi.weebly.com/uploads/1/3/1/3/131384142/kotufibu_zumare_bugab_gigomadimipi.pdfIn PDF document text
    • https://cdn.sqhk.co/zolewiko/A6hbAhj/dazaritarasigow.pdfIn PDF document text
    • https://cdn.sqhk.co/puvegipuros/ejhajji/5419085448.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/vhiz9hi/super_shooter_water_pistol.pdfIn PDF document text
    • http://nuxagoliwanep.22web.org/white_platform_boots_fancy_dress.pdfIn PDF document text
    • https://cdn.sqhk.co/felebamifuk/heJjadq/52175225321.pdfIn PDF document text
    • https://cdn.sqhk.co/kegufamop/Ojagvhh/41524597600.pdfIn PDF document text
    • https://cdn.sqhk.co/dutudovajud/aHgf8gj/vampires_suck_soundtrack.pdfIn PDF document text
    • https://cdn.sqhk.co/tizesefetus/pgiRgg7/golden_gate_bridge_wallpaper_4k.pdfIn PDF document text
    • https://sugovodeko.weebly.com/uploads/1/3/2/6/132681033/08bd89c22f7807.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/rekawexuretowo/astrology_books_in_tamil_language_free.pdfIn PDF document text
    • http://zudovufakigib.epizy.com/alamode_home_sheets.pdfIn PDF document text
    • http://rafotafu.epizy.com/flamenco_dance_performance_near_me.pdfIn PDF document text
    • https://s3.amazonaws.com/pazatuv/sheet_pan_cashew_chicken_the_whole_cook.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_off0000f4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4F3 5200 bytes
SHA-256: cd70da24b7a573834d28c2a63e612db62102ec2cb34664fa729a37d45df0f702
font_01_sfnt_off00010677.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10677 10896 bytes
SHA-256: cfefde35c3faa194f993034fc6df4caa22a088e69a006d3cad9e176064727bcf

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