Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d941c78a7934f6e…

MALICIOUS

PDF

70.9 KB Created: 2021-03-22 07:18:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 3e240857c7c0d61690da6e967a0361ff SHA-1: ead637045ba066ded48b26bcb3b6227446f8ec64 SHA-256: 5d941c78a7934f6e0d159756cd38c279bc72da5f430d2f889e8506f068c5bbd6
126 Risk Score

Malware Insights

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

The PDF document contains multiple external URIs, with one specifically appearing to be a lure for movie-related content, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious document 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://gimoguvi.ru/123?utm_term=bewakoofiyaan+full+movie+watch+online+free PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393016/normal_604e25038b1f4.pdfIn PDF document text
    • http://dajexori.mypressonline.com/how_to_draw_easy_and_simple_landscape_for_beginners_with_pencil.pdfIn PDF document text
    • http://gufurebu.medianewsonline.com/gugax.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449779/normal_5fe86d8adc50a.pdfIn PDF document text
    • http://fefiwizam.sportsontheweb.net/obc_category_list.pdfIn PDF document text
    • http://jawazapefaxuzit.mywebcommunity.org/tata_ace_technical_specifications.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480387/normal_5fc897c0259c3.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://5457524e-bace-410a-9ce7-c8d8bc0eedea.filesusr.com/ugd/f0ffd0_fddfc2a690274cc6a100c53e02c0271f.pdf?index=trueIn PDF document text
    • http://maretubozewugi.myartsonline.com/lutivagiginitinapedijodo.pdfIn PDF document text
    • https://b9ecad59-ee1c-469f-8402-ddbad3bf215f.filesusr.com/ugd/84dab8_0a9245881b2441a7bcb96c4e60394a06.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/numunenoji/43262609157.pdfIn PDF document text
    • https://s3.amazonaws.com/petikamov/zawap.pdfIn PDF document text
    • https://3633ae4e-9acc-45df-885e-1bfa1481cb44.filesusr.com/ugd/e73054_9cfba875dde447999e182f1c9ec5cba3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/juvetaso/les_miserables_10th_anniversary_soundtrack.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuzo/arstotzka_anthem_sheet_music.pdfIn PDF document text
    • https://fecd0c08-032d-4b8b-b26c-6108aca7a00f.filesusr.com/ugd/a87c8b_5725f38ec67140acae17ee2d80cf0ea9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pojikovewijeja/70264632703.pdfIn PDF document text
    • https://s3.amazonaws.com/lewuli/fonduta_formaggio_con_carne.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_off0000cd99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD99 5192 bytes
SHA-256: e5a11b2115306430d2c040e08653d19c16a1899d877cde557d4dfdde5da1ef59
font_01_sfnt_off0000df33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF33 9688 bytes
SHA-256: fedb85f4708d43682f1af1c3f08ab14648c80980c325cb6317f7e537a020630f
font_02_sfnt_off0001004f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1004F 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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