Malicious PDF — malware analysis report

Static analysis result for SHA-256 f07519db5c883384…

MALICIOUS

PDF

70.5 KB Created: 2021-09-26 08:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6c1425eb53b760ccc77e64236ad7c93f SHA-1: 223966910582546a0e6e85b8a34b2330bd9bff86 SHA-256: f07519db5c8833842bebf7c16c80ebf52d301b9408480a74ab38d1973c39dc85
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are part of a link farm, indicating a phishing or distribution attempt. ClamAV and ML classifiers strongly indicate maliciousness. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports the malicious intent of directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://cmfnepal.org/userfiles/files/73007876823.pdf In PDF document text
    • http://tofuyatogo.com/uploads/files/69180456183.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/tulavejapalixuniwum.pdfIn PDF document text
    • http://okun.su/upload/file/jawufadozipisopafutaxawa.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/89740531709.pdfIn PDF document text
    • http://ozhelalikram.de/resimler/files/todanujirawoviluril.pdfIn PDF document text
    • http://chinahongji.com/d/files/milolugasazuresad.pdfIn PDF document text
    • http://ct-tci.com/cttax/userfiles/files/toxut.pdfIn PDF document text
    • http://stellarvvv.ru/ckfinder/userfiles/files/jizigebel.pdfIn PDF document text
    • https://maria-galland.ru/files/file/ferivogijame.pdfIn PDF document text
    • https://aedwea.com/upload/foto/jesilisukutopizufubupor.pdfIn PDF document text
    • http://vitanova-cattery.com/upload/file/jolavadug.pdfIn PDF document text
    • https://bepxuyenviet.com/upload/files/13038731731.pdfIn PDF document text
    • http://gibkrakow.pl/uploads/files/wodidotafanopukumalugi.pdfIn PDF document text
    • https://hobbypet.cz/files/file/809214460.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161362d5a7b16f---lonepulifuliruwawevobete.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/3ab9948ea6b9534cef63f3bcad0b0a75/67907907604.pdfIn PDF document text
    • http://giustizianuova.it/userfiles/file/kusijugivotatu.pdfIn PDF document text
    • http://elistaprezentow.pl/userfiles/file/39133290850.pdfIn PDF document text
    • https://itchanoi.vn/uploads/news_file/59643913946.pdfIn PDF document text
    • http://art-ball.net/files/file/75806438004.pdfIn PDF document text
    • https://3eyamaichi.com/upload/ckfinder_temp/files/20210917181511.pdfIn PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/61345745968.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=shahzad+tv+download+appPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c784.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC784 17392 bytes
SHA-256: 5ced9cd7dc9919770e1768bec7e49318380655d5f21dd8151a5348e32f3c97ad
font_02_sfnt_off0000f3ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3AE 10284 bytes
SHA-256: 3d20b855c3a19af32b88cc2678f7e0640e671a4c23ba9eb2a896159b931a23d4

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