Malicious PDF — malware analysis report

Static analysis result for SHA-256 68c143fb8d838187…

MALICIOUS

PDF

79.0 KB Created: 2021-04-13 15:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 9b4e1d0b0ee1c1f37a87dbbb07e556b0 SHA-1: df135c1ebfc166dddf43318a9a966c166f011ad3 SHA-256: 68c143fb8d838187ec2db15f270b079f50697339e251cdb45212d159bc1d3f7f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs pointing to disposable domains, a common tactic for phishing or distributing malware. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of external URIs and link farm heuristics further supports that this document is designed to redirect users to potentially harmful sites.

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://kuzutuzo.ru/strik?utm_term=mean+words+that+start+with+s+to+describe+someone PDF link annotation
    • https://cdn.sqhk.co/muzolorakow/r1wyyhd/azamara_pursuit_deck_plan.pdfIn PDF document text
    • http://filozajerezabi.getenjoyment.net/xazetobex.pdfIn PDF document text
    • http://my-favshope.online/65308486862cbfhs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391634/normal_5fe65936ea1f3.pdfIn PDF document text
    • http://dekiweragaf.mywebcommunity.org/effect_of_noise_on_human_health.pdfIn PDF document text
    • http://gratoramaa.website/how_to_open_kitchenaid_hand_blender_chopper8bvd6.pdfIn PDF document text
    • http://appletopshop.ru/142193872206rj1l.pdfIn PDF document text
    • http://znalomstvavip.site/netflix_cuties_film_reviewsdqac.pdfIn PDF document text
    • http://rmk4sale.xyz/834023949158ipd3.pdfIn PDF document text
    • https://cdn.sqhk.co/lunosupi/djgpcg7/water_parks_in_texas_with_cabins.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392854/normal_60358523de586.pdfIn PDF document text
    • https://cdn.sqhk.co/pugirunosamo/aSgj2wH/46694353681.pdfIn PDF document text
    • https://cdn.sqhk.co/vozogekom/jgiZ0je/kalilil.pdfIn PDF document text
    • http://xuvaxujogilo.mygamesonline.org/blender_rigging_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/xisiwuba/gimEvWb/top_hits_2020_clean_lyrics.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://situwosase.myartsonline.com/pratidin_newspaper_amravati_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/86fb3ce3-a051-434a-9e6d-3bd71c21ffd1/68992586274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b95ece3-4fd4-4f3d-ae6b-a08c36cb34da/ford_f250_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ebe6278-bdac-4006-bf30-67df321ee40b/temomaxujojobiwomixag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6e0ad4f-0849-4e4f-b68e-418a46b3b1c4/burekebebarolafi.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_off0000f6a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6A6 5384 bytes
SHA-256: aeb5a1b13f524afbf810110c869545db07b648b2531bc18598edd57a85fcae02
font_01_sfnt_off000108e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E6 11004 bytes
SHA-256: 94120bb954a240cc1d9ed84b2d31b59f6eb71a426ef454fdaf13b89c529d18e2

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