Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f78757e66363d1…

MALICIOUS

PDF

82.1 KB Created: 2021-03-25 03:17:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 670eebb00724ff3e4457e17d5538ae81 SHA-1: 8864113de1e654321a49ecf986a51e1a156c56cc SHA-256: 65f78757e66363d1d88916e3d87e39819507a1925b9a4f06624bde10a8f0d064
126 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 0.9995

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://crophysi.ru/strik?utm_term=operations+management+certificate+courses+in+india PDF link annotation
    • http://argo-tourism.com/531237545837lqvx.pdfIn PDF document text
    • http://medyahanem.com/how_much_does_garbage_disposals_costlcq8n.pdfIn PDF document text
    • http://tixshopclub.space/55821719717p057k.pdfIn PDF document text
    • http://ketotreno.buzz/78092703178s3j05.pdfIn PDF document text
    • http://demask.fun/ivanhoe_cambridge_ii_inc_annual_reportc2ppi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411500/normal_5fea2e153892e.pdfIn PDF document text
    • http://wudebakafepi.mypressonline.com/yardsticks_book_used.pdfIn PDF document text
    • http://xipodijajul.sportsontheweb.net/bayley_scales_of_infant_development_free.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/ZjfxNMi/sujiw.pdfIn PDF document text
    • http://reduslim-shop.website/xubaj9octh.pdfIn PDF document text
    • http://copyright-supporthelp.com/18281816704mb232.pdfIn PDF document text
    • https://cdn.sqhk.co/befulirawid/e5KSide/terranova_pizza_dough_whole_foods.pdfIn PDF document text
    • http://my-favshopc.online/agresti_analysis_of_ordinal_categorical_data66poi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453563/normal_6035760c95387.pdfIn PDF document text
    • http://priz24.site/3d_horse_anatomy_software69nvy.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367914/normal_6000cb3244a23.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://944bcc21-9f45-42c2-9889-8cf837fa5d1c.filesusr.com/ugd/50f869_ee2e0c76db314f57bb002f2f6c1fe6fd.pdf?index=trueIn PDF document text
    • https://8ac5c8e1-9174-427d-95c2-90bebb9f105a.filesusr.com/ugd/44b221_aabedd5dece84f0383db46d9d55c181b.pdf?index=trueIn PDF document text
    • http://zujisofivo.onlinewebshop.net/91557465991.pdfIn PDF document text
    • http://jotudokizer.onlinewebshop.net/fox_news_san_diego_covid.pdfIn PDF document text
    • http://makakanow.onlinewebshop.net/mosejibeniwibadapu.pdfIn PDF document text
    • https://58960a86-a3f4-42d8-866e-ee2cf32068b1.filesusr.com/ugd/1ad962_67409fbb42be49d9bc63df740e300d1b.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB89 5468 bytes
SHA-256: 3eabfd435eefb41f81d2a411a8a2757eff715111d1914465c7a6a894a8e3ec2f
font_01_sfnt_off0000fe06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE06 10856 bytes
SHA-256: b101a46adcaff1e0cc52ea31ed3c3535e9f950a344082e13d06267b0a079287e
font_02_sfnt_off00012363.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12363 16160 bytes
SHA-256: 31f54bf1b2a0bd5fcefce680aa7bc0ab7b2c48a0f9a6877104dd616c0c0a5462

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