Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ed1ae01846a45f…

MALICIOUS

PDF

75.0 KB Created: 2021-02-02 00:14:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 32aa45226a55736be5356dcae7a6b2c8 SHA-1: b6fdd4080e59284f0b099a87cc7239747f5b0a8c SHA-256: b9ed1ae01846a45fb9f38117ce2fde92401ff29e4a5813a4a927ee368ba7eef3
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, and contains numerous external links, indicating a link farm or phishing attempt. The PDF structure and embedded URLs suggest it is designed to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF format often utilizes JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/123?utm_term=mind+flayer+name+generator PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4470532/normal_5fe41ad4c93d9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486054/normal_6008730a58127.pdfIn PDF document text
    • http://startbastar.online/kifizeno0171r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366034/normal_60082d4c16a70.pdfIn PDF document text
    • http://springwin.space/turbo_pascal_3_manualem1nj.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/dcM0crV/small_business_accounting_courses_online_canada.pdfIn PDF document text
    • https://bogezozoxo.weebly.com/uploads/1/3/4/4/134479702/3963282.pdfIn PDF document text
    • https://nixujukasal.weebly.com/uploads/1/3/1/6/131636737/a2ea5e717321f.pdfIn PDF document text
    • https://cdn.sqhk.co/vaxarogajib/ih3zHgf/cop_duty_police_car_simulator_mod_apk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486060/normal_5fd2f4ebe9e98.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383915/normal_5ff47340642a9.pdfIn PDF document text
    • http://gratoramaa.space/biblia_catolica_para_jovenesm9j1h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467975/normal_6003393a9da80.pdfIn PDF document text
    • https://teliwunamadawab.weebly.com/uploads/1/3/1/3/131381891/6b9b0ba92210da.pdfIn PDF document text
    • https://cdn.sqhk.co/jusitufugaf/iajghhn/digi_telecommunications_head_office_number_texas.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://jiguluvosasibun.epizy.com/17841161404.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB86 4944 bytes
SHA-256: 082730582d1f4409cfea7ece850f81fd1fb897949813266a69a5a96243db7f47
font_01_sfnt_off0000ec46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC46 10760 bytes
SHA-256: 5c57f87a8ee653f9dc9643ad03fd03f6e076a2a31dbac7ee0f1476bf206c9992
font_02_sfnt_off000110ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110EE 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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