Malicious PDF — malware analysis report

Static analysis result for SHA-256 c47706445c6e51bd…

MALICIOUS

PDF

88.1 KB Created: 2021-01-14 05:39:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: e469717e45317fbd5f4ddc4bbf8062c5 SHA-1: 4e3017deec281a3a5375ab3ee540d4d3acf77e9a SHA-256: c47706445c6e51bdc22d6e697c132ade8a6347e11ed4ea54923a4b35ff41c8dc
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified as a PDF link farm. The primary URL, 'https://trafffe.ru/aws?utm_term=ben+10+upgrade+transformation', suggests a potential phishing or SEO manipulation attempt. ClamAV detection and ML classification confirm the malicious nature of the file, indicating it likely serves as a lure 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://trafffe.ru/aws?utm_term=ben+10+upgrade+transformation PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421365/normal_5fceef994a684.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367644/normal_5f88c3d1e0fd1.pdfIn PDF document text
    • https://gumopaxegekugod.weebly.com/uploads/1/3/4/0/134018731/fipubujisikem.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415748/normal_5fd8fef50330b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476564/normal_5fdb1d51537d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5fe8f4fc98034.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471099/normal_5fef67960ebf4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447084/normal_5ff0e310f1837.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505326/normal_5ffda345b9a0b.pdfIn PDF document text
    • https://guxilidokuwog.weebly.com/uploads/1/3/0/7/130738661/1239581.pdfIn PDF document text
    • https://fulotetaputu.weebly.com/uploads/1/3/2/7/132740707/buguboxedaxomij_wosaxojizopoku_koseluzorex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503533/normal_5fe26bc06cf1b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390637/normal_5fd9193c7f847.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ebdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDF 4276 bytes
SHA-256: 4896f2bc4a2638c93dbfd072178bab7ddb30977d9ff1711a3d3bace627f5daa8
font_01_sfnt_off0000fb39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB39 5572 bytes
SHA-256: c35f85d079a0a6e1284990cf0b7d2676519b26b9515e5419c848ffc050c64ccf
font_02_sfnt_off00010e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E27 14336 bytes
SHA-256: e92157f33840d7aed61b1d1d26d48d035ce83ca500cc13b48c20342c0f5094d6
font_03_sfnt_off00013c21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C21 16512 bytes
SHA-256: 336b37d2c1688bb97e20a897ed3c248366cfa120f2b497be9379077d056ed53a

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