Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab76bfeec16e3d5a…

MALICIOUS

PDF

64.5 KB Created: 2021-03-16 21:38:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6cfa429214817b5567b216fd8f24cb0a SHA-1: 9c1d51496c0543ba5cc0b3989e3b4166cffa3c79 SHA-256: ab76bfeec16e3d5a34fb81f3c52fb894879de9d5a482f93d0714285a3eda788e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9998

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://soxebez.ru/wix?keyword=citizen+eco+drive+wr100+manual PDF link annotation
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/396397.pdfIn PDF document text
    • http://zaxevef.getenjoyment.net/health_and_safety_executive_ni_risk_assessment.pdfIn PDF document text
    • https://ribovaboj.weebly.com/uploads/1/3/0/7/130775049/b36bc7016c3.pdfIn PDF document text
    • https://cdn.sqhk.co/wixexozesila/mghwgea/invaders_from_space_starman.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490961/normal_602eadc5800eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376625/normal_5ff67ae910c59.pdfIn PDF document text
    • https://cdn.sqhk.co/zimuteraf/S74hehh/tufokebav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456984/normal_600e072a9b218.pdfIn PDF document text
    • http://nageramuvepom.mywebcommunity.org/how_fast_can_a_rzr_170_go.pdfIn PDF document text
    • https://cdn.sqhk.co/runenuti/8hfhhur/spongebob_sponge_on_the_run_movie_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374860/normal_600a90588a7e2.pdfIn PDF document text
    • https://cdn.sqhk.co/fulaxanew/iimhijf/69442352217.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fugufaza.myartsonline.com/5339874143.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/corbettmaths_answers_5_a_day.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/duseg.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/bepewag.pdfIn PDF document text
    • https://7a1f2a0d-094a-4466-88af-72a4af93b9fa.filesusr.com/ugd/22739b_bb092e19c7a04f5ea7ff2c1e4bd4e85f.pdf?index=trueIn PDF document text
    • https://3176e400-c268-4dc0-8d69-08eae86937f8.filesusr.com/ugd/ea2f88_3b0d872ea0584e0a85667ef6ca30e233.pdf?index=trueIn 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_off0000c150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC150 5208 bytes
SHA-256: 2d3f7fe2cf761b0aa67e063a417aeb262ba8f87bfac7740fee2bd1dbda1f64a9
font_01_sfnt_off0000d308.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD308 10084 bytes
SHA-256: 2ea7b95b106a20300e5e0fc36afda60a4040eedcb95cec64acb04514a9c80221

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