Malicious PDF — malware analysis report

Static analysis result for SHA-256 e206b6b857a2021c…

MALICIOUS

PDF

70.7 KB Created: 2021-03-15 23:08:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 452472d365a4f5d7db58f9fb4023ce77 SHA-1: b522e2b5d49cc82f314a0bc3dc3723ad9e4008cf SHA-256: e206b6b857a2021c24310d26c4a42528cd0f4c01952e09ebc047ea6d841e77af
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://pelibifir.ru/strik?utm_term=victory+atlanta+service+times PDF link annotation
    • https://zonapabudaxaj.weebly.com/uploads/1/3/4/0/134017389/6153276.pdfIn PDF document text
    • http://vereffka.xyz/tigosa55l90.pdfIn PDF document text
    • https://cdn.sqhk.co/moxibusas/0hjhiA2/dragon_raja_recipe_executive_chef.pdfIn PDF document text
    • http://igme.site/uscg_med_cert_extensionl9w3b.pdfIn PDF document text
    • https://cdn.sqhk.co/zifiguwosu/WC7gcqT/bosaketibeges.pdfIn PDF document text
    • http://yesstore.pro/reditonavobawim8s1vu.pdfIn PDF document text
    • http://rebelliona.online/rukupegagesidunngkv0.pdfIn PDF document text
    • https://xowogibudul.weebly.com/uploads/1/3/4/4/134446034/919e7de61b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495262/normal_6003530595438.pdfIn PDF document text
    • https://cdn.sqhk.co/kimejijomaki/iihf3gh/98380109315.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464877/normal_5fd1d82d913ea.pdfIn PDF document text
    • http://7evenrp.ru/what_is_the_best_age_to_have_laser_eye_surgerylnivc.pdfIn PDF document text
    • https://ribimefisele.weebly.com/uploads/1/3/4/5/134516567/jufamex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423443/normal_6035cb1722456.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e22e8d81-f41f-4d51-abb1-39b19d2d32bb.filesusr.com/ugd/96bf9d_ef00bfc92c2745bdbcb2ccbcac4f7882.pdf?index=trueIn PDF document text
    • https://f3ea461b-95fd-44cf-949c-5afda193840f.filesusr.com/ugd/a48928_789498a7ac6f4276ae960f9615d0d01a.pdf?index=trueIn PDF document text
    • https://238a82c5-85a8-4641-a991-2f0f5270ddc4.filesusr.com/ugd/63f22d_bda910c1834440adba721a6094532fc1.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_off0000d610.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD610 5072 bytes
SHA-256: bf2d3312aa94e0fd0d2aa0435926e2396d83624db6fc3762ec0e9acbf3d14e4e
font_01_sfnt_off0000e74b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE74B 11504 bytes
SHA-256: bf1b4a292329a489264c80155655e710e06adf59e4018da1ae67b0118a6d855a

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