Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a019e7e54450034…

MALICIOUS

PDF

71.7 KB Created: 2020-12-08 07:47:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: dcb637abbdb73bc0e5bbdd479ec1551b SHA-1: bc0546ac09b8476a53982d8ddefbad757c3965b9 SHA-256: 0a019e7e54450034d115bd60f09040d8ad832a31f0e06a67ba790ed7fa8b665c
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-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/123?utm_term=nursing+considerations+for+metformin PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457839/normal_5fc1f3c7c97be.pdfIn PDF document text
    • https://lirebuzufosol.weebly.com/uploads/1/3/1/4/131453665/791bf9d83063e8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413225/normal_5fb466ea28a37.pdfIn PDF document text
    • https://kagilovudugavap.weebly.com/uploads/1/3/1/1/131164538/luxat-fivupawovi-gekevu-sizujulejifirad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf246ef3361272aeb0312/1606218311293/bowtech_carbon_icon_string_specs.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf5f919ee0f32b874b56fa/1606377363340/ocean_city_nj_property_records.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50f1792c50b1a1e923a88/t/5fc5e671bc819f1cf4a4be0b/1606805106658/rifuwafudugikojonepe.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d33427a199023ab4f616/t/5fc9466a59093a79be16cdfb/1607026286453/king_tower_13_clash_royale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7648bec-bd30-4b13-a22b-5969f2b1fa3c/browning_22_semi_auto_rifle_owners_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/kawotexulozax/fertile_crescent_map_quiz.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC41 5280 bytes
SHA-256: a40053a678f2dc216d781974f85703d686a23b0157fe31612a3f87b7bf57b4c3
font_01_sfnt_off0000ee27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE27 10400 bytes
SHA-256: 292a3f751d0557e84a28053a26d7f2621aa46d1b10e6beb4db04c94c6204d472

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