Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3c0e5c073c4c99d…

MALICIOUS

PDF

82.2 KB Created: 2020-11-18 14:43:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: b7bcfb698f545693265cddf575e259b8 SHA-1: 89f38af7ee801e22c16ac34514c62f3ce2d77436 SHA-256: f3c0e5c073c4c99dd2913c06f38e7f11e68c805e3bb818d75a0426fccc3a6f08
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 0.9991

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://traffine.ru/strik?utm_term=canon+in+d+violin+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4391327/normal_5f9826cabaa11.pdfIn PDF document text
    • https://kelipibefis.weebly.com/uploads/1/3/4/5/134500531/306147.pdfIn PDF document text
    • https://wosezobar.weebly.com/uploads/1/3/1/8/131856012/4b26c3b70bbd7a.pdfIn PDF document text
    • https://dedeluruxizo.weebly.com/uploads/1/3/4/3/134305162/poxezuzixuzulujezem.pdfIn PDF document text
    • https://gejuvidafi.weebly.com/uploads/1/3/4/4/134456396/bodukubowewupela.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/vokeri/meben.pdfIn PDF document text
    • https://s3.amazonaws.com/sazariwapa/95562533754.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/awara_bengali_full_movie_hd_free.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/babapupewij.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/bhoot_fm_2018_february.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0A9 4724 bytes
SHA-256: 967fabfe4271f5e789d8225392b7d6b152ed454f9080415d5c90a4d73f095d52
font_01_sfnt_off0000f0db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0DB 11500 bytes
SHA-256: 4bcc05a6073aa033d0b166370f8dd85b382c2894613b9da5b0d1066e0fe33e58
font_02_sfnt_off00011779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11779 16180 bytes
SHA-256: 7877390a1352c70efc6e476bde7e375646feff8825bd06ab2ff510e60f3bc0cc
font_03_sfnt_off00012c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C9F 6128 bytes
SHA-256: de7cd77d069192b6eb161bf3216f35de75d695314482f32e008ba1f250f3410d

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