Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7baf4dbae4e84fd…

MALICIOUS

PDF

69.0 KB Created: 2020-12-14 02:56:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: a4cec3375a98d3c39e9038195810b3d8 SHA-1: 18f3229c8f18ea9efed79266d41fef683ea2d480 SHA-256: f7baf4dbae4e84fd2b2747dd83be2c5552747d43f88612c0cf958fe57a4dc590
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains numerous external links, with one prominent link pointing to 'trafficel.ru'. This URL, combined with the heuristic 'PDF_SEO_LINK_FARM', suggests a malicious intent to redirect users to potentially harmful content. The ML classifier and ClamAV detection further support its malicious nature, indicating it's likely a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/strik?utm_term=congruent+triangles+worksheet+grade+10 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4447265/normal_5fbd8615cc101.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450516/normal_5fa0c8ee82d9a.pdfIn PDF document text
    • https://rurusoweloxefug.weebly.com/uploads/1/3/3/9/133989150/6804219.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/petuzutemixuvod/veramuxatabatov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38f2516b-35cf-4acf-be47-20720d7baca8/55343058876.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc58fe89955c744b55b026c/t/5fca49462e4d7f67ca37b111/1607092551843/find_my_phone_android_by_mobile_number.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2f3296e-8648-4e3a-8f64-f40c1547d27a/tuwetisuvasufamomiwumo.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd04e32c6de34c7a39ed1c/1606223076024/sfsu_summer_2019_grades.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42b2e7f1-c2bf-43ed-956c-bbfe26871cdb/tailor_gw2_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe0f14f3de5e49b52bad1d/1606291220749/clad_sample_exam_2019.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcf5e8b4c4d833b8bcf2e6/1606219240727/magic_circle_against_law_pathfinder.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_off0000cc84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC84 5344 bytes
SHA-256: d71cf9f529ad6462350355316f0bece8be879b9994be0f50fe982d863ed5a155
font_01_sfnt_off0000debc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBC 12692 bytes
SHA-256: adf7ea514ce92985810f931cafef5d4f96e6f84ebf97a8ea7c6cfe51c932f36e

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