Malicious PDF — malware analysis report

Static analysis result for SHA-256 90474b06b18ef60f…

MALICIOUS

PDF

69.4 KB Created: 2020-12-19 07:27:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 9fae58098d40cf98136dc6507c73cca2 SHA-1: b4c39805259211efa024557719ed29bcdb293a72 SHA-256: 90474b06b18ef60f743620efd91d24e2afe7749b5593f992b73a7b530b833026
164 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=injustice+gods+among+us+hack+app+android PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4470696/normal_5fab154c7052a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453102/normal_5f9f3e7e1c614.pdfIn PDF document text
    • https://nutifikidejuz.weebly.com/uploads/1/3/4/3/134347692/8419574.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465257/normal_5fd3b2db2b96b.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/5fce5f182c00fb194151f4ae/t/5fd6c7b813a48350e822132c/1607911355288/bgp_routing_interview_questions_and_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc7a3b0a190b16b315946c/t/5fdd004b9f71d1130da7dcde/1608319051887/gonibo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcf4c37181af13ce2764521/t/5fd12fe95122556f22a50ecd/1607544809547/98477637141.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1939ac6d964583626ee44/t/5fc50495eaf37e3b643a82da/1606747287105/11542942369.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdefa01972c46e3c643603/1606283169281/hockey_empty_net_penalty.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0d900d26ff1194f736c6f/t/5fc823f1e21c7c679ad8444c/1606951921844/22873680740.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a28835b5-5ecb-4d93-85dd-2f7202b48aae/genozuzinilezo.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

Related samples 4

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C9 5532 bytes
SHA-256: e3ba522647bb4a3c72f7a5e7542b93dfd600f00c1b38a4ef241c616b7567556d
font_01_sfnt_off0000e473.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE473 10768 bytes
SHA-256: f4e3118035f0464bd584cf6662bcf5c5704773dc2df9e381acde69408462819a

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