Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b14b0cf484b74f4…

MALICIOUS

PDF

76.6 KB Created: 2021-03-10 07:58:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f5fc87411875713426b32438430d0eb0 SHA-1: 97d51237146fed461e560f81d826ac1e22297ac0 SHA-256: 5b14b0cf484b74f41b786aac4eab88fb372e4c5e8fbfe01279d87b3a319b80f0
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 0.9997

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 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://jumiwimov.ru/aws?utm_term=what+is+the+setting+price+for+a+ring PDF link annotation
    • http://scotiaenlineape-personas.com/sample_projected_balance_sheet_business_planivyx3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383561/normal_5ffcd8e65a292.pdfIn PDF document text
    • http://gedatidigog.sportsontheweb.net/what_percent_of_each_hogwarts_house_are_you_buzzfeed.pdfIn PDF document text
    • http://gubixazolela.sportsontheweb.net/how_much_is_kristian_alfonso_worth.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426080/normal_6033636d10c4a.pdfIn PDF document text
    • http://tebapewulodafe.getenjoyment.net/shepherd_the_flock_of_god_april_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370275/normal_600c7833d1613.pdfIn PDF document text
    • http://govnosiakxws.online/maths_worksheets_for_class_6_with_solution69wjz.pdfIn PDF document text
    • http://vudifabofugejij.medianewsonline.com/95815564857.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393018/normal_5ff782f170c4a.pdfIn PDF document text
    • http://soul-felt.com/zefeletibiwobisufak6oj9.pdfIn PDF document text
    • http://help-feedback-amzn8.xyz/magic_chef_rv_stove_top_replacementl27c0.pdfIn PDF document text
    • https://satepiwe.weebly.com/uploads/1/3/5/3/135350267/tigol.pdfIn PDF document text
    • https://wopirizebopate.weebly.com/uploads/1/3/1/4/131452778/2159504.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368225/normal_6033f5d4b1124.pdfIn PDF document text
    • http://detonicro.website/15657630369ngwub.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/ropidadegaxut/file_from_sftp_server_using_vb._net.pdfIn PDF document text
    • https://31c8a3d4-0132-49f1-a04f-09c79d03e01f.filesusr.com/ugd/a4da84_d295d6c36888463184bd0d673698f9fd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tugumeb/current_and_current_density_at_a_junction_mastering_physics.pdfIn PDF document text
    • https://e0a971b2-7104-4718-9e5f-4f17d768618f.filesusr.com/ugd/6d43b6_8dc084a450bd4ba8b0d1dcba4310f919.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/vojapu/zafekunevepagasanoguv.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_off0000ef3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3B 5260 bytes
SHA-256: 17c6556956fff0940690760e6fd6edadb877d45ae62a137a0914d19798f5a87f
font_01_sfnt_off0001012c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1012C 10428 bytes
SHA-256: 36010913f6d095864d5cce357e0be1344508a0c69e4d31e7c56ebf5d3f124009

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