Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5eb051b370cbb2b…

MALICIOUS

PDF

72.4 KB Created: 2021-03-10 08:03:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 4a9d10b8191b456ebce253ca6198b84f SHA-1: 9dd1ef534eac291ea7bab9b54c1075026593e47f SHA-256: f5eb051b370cbb2b5c41db97fdc8236976986f328d9e27dccfb76e1a2681fa68
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 0.9996

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://ponafet.ru/123?utm_term=kinetic+and+potential+energy+quiz+answers PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4455657/normal_602a762bb59dd.pdfIn PDF document text
    • http://gadetebes.sportsontheweb.net/aristotle_categories_sparknotes.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368492/normal_6030edfa0877b.pdfIn PDF document text
    • https://purubagenipobeb.weebly.com/uploads/1/3/1/3/131398544/673615.pdfIn PDF document text
    • https://rovijekamiveva.weebly.com/uploads/1/3/1/4/131437241/bemolenul.pdfIn PDF document text
    • https://dipakinujudisil.weebly.com/uploads/1/3/4/4/134468351/18998.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475389/normal_5fdc8758639f5.pdfIn PDF document text
    • https://gewaxuselez.weebly.com/uploads/1/3/4/2/134265722/2112459.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/ppp_lesson_plan_example_present_continuous.pdfIn PDF document text
    • https://rusebetasamafi.weebly.com/uploads/1/3/3/9/133997145/tumukavat.pdfIn PDF document text
    • http://wusator.mygamesonline.org/a_arte_da_prudencia_baltasar_gracian.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://suxazetevuzo.onlinewebshop.net/79915024352.pdfIn PDF document text
    • https://96a9e3af-f0c3-4048-9e6c-0ad8da3c6018.filesusr.com/ugd/15d534_8c02b3013fd44bd5ac0b7b9d883bdc34.pdf?index=trueIn PDF document text
    • https://5fb42ee6-a9be-400a-98f2-f9d4b9f720c8.filesusr.com/ugd/1813b3_03f32c57329940d7a2b4b2077b614ee8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lomuper/android_x86_virtualbox_image.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/approval_letter.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/how_to_install_self_adhesive_vinyl_tile_flooring_on_concrete.pdfIn PDF document text
    • https://724418e0-3ace-43c1-abd8-628b4820fc71.filesusr.com/ugd/6df952_a088964b29fb449d8f50874f5c277733.pdf?index=trueIn PDF document text
    • https://920f4c01-5fd6-4c40-8b27-b99972fecb60.filesusr.com/ugd/d63aaf_e1a7305221d54121a8da5aa49c3bfdc0.pdf?index=trueIn PDF document text
    • https://8d5bcf17-53f2-4f21-b585-7a27aef14131.filesusr.com/ugd/7baf93_71b8e8e60a7040fab4f6dde997de4193.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kovozenamofox/cold_air_intake_performance_gain.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA89 5580 bytes
SHA-256: 395a403a52805df5097a036ed6cf5b3029f6823b18446e1e28a1eae5ed818800
font_01_sfnt_off0000ddb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB9 9680 bytes
SHA-256: 5a24b24f73d8e1618e147d3e95bf2a8a1e9aed0e7224ddfb9871942b06a30d53
font_02_sfnt_off0000feea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEEA 16144 bytes
SHA-256: 2a5f1667c2e343500efde63e3dd6a136498333968b1680966ac5eb34589f1174

Open this report in the interactive analyzer, or submit your own file for analysis.