Malicious PDF — malware analysis report

Static analysis result for SHA-256 13c6ff858231ecdb…

MALICIOUS

PDF

84.1 KB Created: 2020-11-13 06:43:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8ba7d92d4a7b91beed8c59e87bec4cf8 SHA-1: dda7c9b00eb029ae2ccf63f48333048d24f09d0e SHA-256: 13c6ff858231ecdb8cd5fefe1e2792517f9215c4fae6f089e03adaa29ec65edd
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 0.9994

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://traffking.ru/strik?utm_term=naruto+kana+boon+silhouette+mp3+down PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422372/normal_5f9c565514139.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/lutafobufoj.pdfIn PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/manelol.pdfIn PDF document text
    • https://folesatabija.weebly.com/uploads/1/3/4/4/134441350/jomubab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411493/normal_5fac539b4c60b.pdfIn PDF document text
    • https://rewemekekebaz.weebly.com/uploads/1/3/1/4/131406535/3789622.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369774/normal_5f90d67ae777e.pdfIn PDF document text
    • https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/rivupup_lemiba_gomake.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367268/normal_5f984284421ab.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/pujirageg/2015_ap_english_language_and_composition_free_response.pdfIn PDF document text
    • https://s3.amazonaws.com/roxawo/season_worksheet_for_class_2.pdfIn PDF document text
    • https://s3.amazonaws.com/paropabaru/rezevoma.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

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3DA 2848 bytes
SHA-256: 6a0ced336f9510fba0f0eeb85e50291979e4470e370158fcf4ae0d61e8c067f0
font_01_sfnt_off0000d010.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD010 9604 bytes
SHA-256: 1aa9ed111686fce0da11f0b0a01f24fd1b8775ff5ca0114c70e13c77c6ca7052
font_02_sfnt_off0000ef91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF91 5628 bytes
SHA-256: 30a244a1a71c97607b9ac2b6505c3e5542e9eabd97ff2f0285a011834ddb865f
font_03_sfnt_off00010297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10297 11664 bytes
SHA-256: 8b6fcd17cb77680654ef153576b4107291e561eda54ee7a1f2e0854a6c306fff
font_04_sfnt_off00012aa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AA4 16292 bytes
SHA-256: 4fcfdb85f633ece30fb621041ae9161345885bcf20479e52df0f0c14a299a1b8

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