Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca1a12648398b05b…

MALICIOUS

PDF

62.8 KB Created: 2020-12-24 01:40:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b49c4fe79fa2fe8fe00a29623a45e145 SHA-1: b29a64963a68596164207b919ded35c7de85f315 SHA-256: ca1a12648398b05b0dde153a3f5f46ed7e293fe3e2a96b93acabe3dab8d5032a
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://traffking.ru/strik?utm_term=smash+hit+vr+steam PDF link annotation
    • https://sobokiza.weebly.com/uploads/1/3/4/3/134363786/3d10657246154.pdfIn PDF document text
    • https://cdn.sqhk.co/lutaxudepoje/7qkgg7B/mevasofi.pdfIn PDF document text
    • https://letotanuvimipe.weebly.com/uploads/1/3/4/5/134598603/4569904.pdfIn PDF document text
    • https://nutofuwinoxa.weebly.com/uploads/1/3/4/7/134719482/sotefanawajex.pdfIn PDF document text
    • https://monitomifarus.weebly.com/uploads/1/3/4/8/134883818/9159747.pdfIn PDF document text
    • https://xugubevowasisof.weebly.com/uploads/1/3/4/8/134885616/d6990e7917462d.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/dinigugaxej/28859779823.pdfIn PDF document text
    • https://s3.amazonaws.com/napisakaluja/wulefajotasanuboreb.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/reneti.pdfIn PDF document text
    • https://s3.amazonaws.com/ropuba/naveso.pdfIn PDF document text
    • https://s3.amazonaws.com/lekezaru/frp_bypass_apk_free_for_android.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_off0000b949.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB949 5056 bytes
SHA-256: ec112a5381b396eccfdc665cc9002f8bf2eadd2a2ac01a376c71e288064aa33d
font_01_sfnt_off0000ca51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA51 10844 bytes
SHA-256: 5a4cee0bebae376a81d7b4d13ea815334c1919dcc0c98d37b74ffda5da354aec

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