Malicious PDF — malware analysis report

Static analysis result for SHA-256 9009f14d6f170d74…

MALICIOUS

PDF

78.0 KB Created: 2020-11-16 20:54:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: e752bcb21f4e88bd331809b0e8f95048 SHA-1: 5b36bcc20a2f424cf117602a40c412d027bb54fa SHA-256: 9009f14d6f170d74110e84ca536946a8c79735c335241b0e5feb7b935caf5c9f
156 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://trafficel.ru/strik?utm_term=the+little+prince+and+the+eight-headed+dragon PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393370/normal_5f8f98c258dd7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393026/normal_5f97430327af1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368246/normal_5f8ac9e3afe1c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369632/normal_5f8955738f48e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412606/normal_5fa71a8414541.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403806/normal_5fae275995738.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416506/normal_5faf2ba9d552e.pdfIn PDF document text
    • https://wivupenoremew.weebly.com/uploads/1/3/0/7/130775018/3fbaa875ced4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470523/normal_5faf6cf633675.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366620/normal_5f877d7e90a8c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370302/normal_5f8a5f0cd1b1d.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/jinabisura/voltage_divider_rule_formula.pdfIn PDF document text
    • https://s3.amazonaws.com/juvetaso/microsoft_word_letterhead_template_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/popagexexoza/super_smash_flash_2_at_school_99.pdfIn PDF document text
    • https://s3.amazonaws.com/pibajuwi/97567313653.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 1

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB91 5128 bytes
SHA-256: e93c53d65f23a84604400ff1257ba6ed498b1cfff27d519304142fac385c546d
font_01_sfnt_off0000dd75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD75 5136 bytes
SHA-256: 3f279445be07ef2d8895af246cbf32db885410aec3fd25d704a3ed50d326ba99
font_02_sfnt_off0000eeef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEF 11156 bytes
SHA-256: 63b4b8371317d86dded7b24cc532af4feee308628464306b8793ffd58aab967d
font_03_sfnt_off00011455.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11455 16344 bytes
SHA-256: 8efa8c52d42c000b22a9c1a4d1c6c4578981e9e3a02b341666c1135a6f68603e

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