Malicious PDF — malware analysis report

Static analysis result for SHA-256 b46ce1b242a16aea…

MALICIOUS

PDF

77.8 KB Created: 2021-03-20 04:29:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 865fe5e0c4e2aed75aa695f1ee981d08 SHA-1: c476ae30b50d64e7c724e8393826294eeb52e43f SHA-256: b46ce1b242a16aea70fb0f7b8ed9405b7d7a3f598cd37dc6cbeb57503d9cfc7e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and heuristic firings point towards an attack pattern involving redirection to malicious sites.

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://bologen.ru/wix?keyword=outback+graber+bike+rack+hatchback+instructions PDF link annotation
    • http://promooffer.site/roku_3810rw_specsc9ixv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4505771/normal_600c9fa65aa85.pdfIn PDF document text
    • http://spainwow.pro/bass_guitar_exercises_for_dummies_free_downloadk2uft.pdfIn PDF document text
    • https://cdn.sqhk.co/ketifoseja/coHijhe/predator_vs_alien_jeu_gratuit.pdfIn PDF document text
    • https://cdn.sqhk.co/kexofebiziv/jgijcXb/fovisizeluzanivulixexole.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459058/normal_6012981a22fa2.pdfIn PDF document text
    • http://idealslimitalia-oficial.site/nejakimemisoximiba6zmz.pdfIn PDF document text
    • http://catsism.com/blackshirts_and_reds_epub9bgvn.pdfIn PDF document text
    • https://cdn.sqhk.co/pixazizaze/cggchbA/27514528100.pdfIn PDF document text
    • http://kokolonesafu.getenjoyment.net/85590203475.pdfIn PDF document text
    • https://cdn.sqhk.co/fagiseregu/ghlYjgv/101_okey_hd_internetsiz_yuzbir_okey_hd.pdfIn PDF document text
    • http://lenusabipowezo.getenjoyment.net/jinezexuxubiwi.pdfIn PDF document text
    • http://abwaab.su/9613052868zidqf.pdfIn PDF document text
    • http://zonerokemub.getenjoyment.net/circulation_du_liquide_cphalo_rachidien.pdfIn PDF document text
    • https://cdn.sqhk.co/pumopijaku/heiechj/playstation_store_sale_black_friday.pdfIn PDF document text
    • http://pedalini.club/mafujigemewodak88bw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/gozifep/cameraman_ganga_tho_rambabu_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/primer_material_2_angular_6_admin_template.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/57157260824.pdfIn PDF document text
    • https://s3.amazonaws.com/medaliwifufugel/repifawizetenu.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dc38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC38 5140 bytes
SHA-256: 4b76bed342d036fd7eeccbf188f36fcc1446b2f4b28cc36e9f5734dbdc4becff
font_01_sfnt_off0000edac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAC 13812 bytes
SHA-256: 62bea9e18034d1d56bd4e594e61fc807304746ff332bfefc01c8384a7efad4d4
font_02_sfnt_off000119c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C5 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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