Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e84fcc4ada28fd6…

MALICIOUS

PDF

68.1 KB Created: 2021-03-24 16:28:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0a77950b938ce0dd85259ddd8a7388d3 SHA-1: e4844b8206a099f005ce18245db1abffb20ce9cc SHA-256: 3e84fcc4ada28fd647fc7d342dc99cdcf50fa0abee1b33da56cdbfca1ad29283
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 0.9996

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://jacksth.ru/wix?keyword=kof+wing+1.8+unblocked PDF link annotation
    • http://kesisofawa.mygamesonline.org/xfinity_dvr_online.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446170/normal_5fc86b07b0070.pdfIn PDF document text
    • http://pazolozul.mypressonline.com/65348953429.pdfIn PDF document text
    • http://lifolibi.sportsontheweb.net/bebepudajafigewexatowejas.pdfIn PDF document text
    • http://copyrighthelpbusiness.net/remington_870_assembly_instructionsasul3.pdfIn PDF document text
    • http://wapividazofar.scienceontheweb.net/download_light_novel_arifureta_bahasa_indonesia.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459328/normal_602ce64fb42dd.pdfIn PDF document text
    • http://leaninrzpd.site/lurigeravufanafoturiloferbtgrm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4466689/normal_5ffde152c3bc9.pdfIn PDF document text
    • http://vk-settings-change.online/lexus_gx_460_review_2015a979v.pdfIn PDF document text
    • http://movawizaxaxato.mywebcommunity.org/85285455872.pdfIn PDF document text
    • http://lobafor.mypressonline.com/79725638783.pdfIn PDF document text
    • http://pelinebaj.mypressonline.com/1042442804.pdfIn PDF document text
    • http://xoziduso.mypressonline.com/5980906652.pdfIn PDF document text
    • http://life50it.pro/pesalotafiwonoxeq9w8z.pdfIn PDF document text
    • http://momarivido.mypressonline.com/piriformis_syndrome_stretches_and_exercises.pdfIn PDF document text
    • http://dunodipike.sportsontheweb.net/treble_and_bass_clef_worksheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480399/normal_6023d70014712.pdfIn PDF document text
    • http://dodajavux.scienceontheweb.net/animal_cell_structure.pdfIn PDF document text
    • http://dasiwujupuna.sportsontheweb.net/super_mario_land_3_super_nintendo.pdfIn PDF document text
    • http://dosaxixapaxa.medianewsonline.com/42817324740.pdfIn PDF document text
    • http://vugekowuzujed.scienceontheweb.net/fadobatuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000ca81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA81 5248 bytes
SHA-256: a1712f59564b41477f34eb17baad7c6e1b13742b29613e6a93887677b1e5ba96
font_01_sfnt_off0000dc9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC9F 12424 bytes
SHA-256: cd64a22c54c42f0380fca4a55515043d21056206587aa6ec141f8e046a4fcb67

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