Malicious PDF — malware analysis report

Static analysis result for SHA-256 2429e808e4632faa…

MALICIOUS

PDF

69.9 KB Created: 2020-12-21 14:49:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 2ae44ef24b205d773d0357c8aa245f94 SHA-1: d9341fbfdf858c8b476a1f9e84739a7f6286708e SHA-256: 2429e808e4632faa647cf877ad1d632c93993ef773e6061d3161cfc64cbb2922
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 0.9995

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://trafftec.ru/strik?utm_term=hybrid+animals+real+life PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4444866/normal_5fb5343d044be.pdfIn PDF document text
    • https://mafobosapufi.weebly.com/uploads/1/3/4/5/134505980/depagikutojamode.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374009/normal_5f9fd5f375f29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408997/normal_5f95f234e20df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401723/normal_5fbf89f54cbcc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://static1.squarespace.com/static/5fbfd56316f6d44b07b8b81c/t/5fc1a329bc819f1cf41651fd/1606525738389/30264229109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e7ce6c7-76d4-4757-b4bf-a6c1a332ba19/ratovajabiwefasuvar.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/iaai_auto_auction_buckhannon_wv.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/suzulazelatemunanutejebo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fce2c48dded0f7041abf4e7/t/5fcfc2359a797b167a3aa26e/1607451189285/zagixerora.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://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC722 5256 bytes
SHA-256: cb552076d8a259ee3bc6c153c8d64669eab5f912ccc6809cca2e9f5ebcd5760c
font_01_sfnt_off0000d8e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8E2 6148 bytes
SHA-256: 4910d0177da9f60ecc92c13a34fae8c5c38ffafb9e4e22a3c3fd987548b79157
font_02_sfnt_off0000e8c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8C2 9912 bytes
SHA-256: 5f1653e77265082a0faa67b8232890c2f9500632e7396d4a98082d0f689b3057

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