Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4ce0f054b0d5fdb…

MALICIOUS

PDF

70.6 KB Created: 2021-10-02 11:06:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8906009962d249f38785e9617779207b SHA-1: d4b4196b0196b5ed6439ec3445bb6956be576edd SHA-256: b4ce0f054b0d5fdb0d4ddc80e34c75cab7723d612787781f9af925326112b724
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various PDF files hosted on potentially disposable domains, indicative of a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://makassitools.com/userfiles/file///fegik.pdf In PDF document text
    • http://abwhopewell.com/uploads/files/jejufisewexixogamujejufug.pdfIn PDF document text
    • http://abcgsgeds.friendship-match.com/upload/files/45780225762.pdfIn PDF document text
    • http://cerritos.songhakbbq.com/uploads/files/bikusikujezutoguzaguguwo.pdfIn PDF document text
    • http://jamones-luna.shopcloud.es/ckfinder/userfiles/files/4289130704.pdfIn PDF document text
    • http://3t-t.com/User_File/UpFile/file/20210926202954_NTExMzIxMTU2Mzk=.pdfIn PDF document text
    • https://ecoolteh.eu/galeria/file/28431197430.pdfIn PDF document text
    • http://zensushialiso.com/uploads/files/batazagenifugebumakuno.pdfIn PDF document text
    • http://standardamulet.com/files/files/vogegododijapap.pdfIn PDF document text
    • http://chelseafoodmart.com/uploads/files/8005971674.pdfIn PDF document text
    • http://gruppocaminiti.it/userfiles/files/bunozimagiwota.pdfIn PDF document text
    • http://chekeeh.ir/basefile/chekeehir/files/93171074397.pdfIn PDF document text
    • http://piemonteforyou.it/userfiles/file/kunegepagiku.pdfIn PDF document text
    • http://www.ecvbrass.ch/user/web/file/65986947077.pdfIn PDF document text
    • http://anpharma.net/upload/files/93736408565.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16133a977817e5---nipunazerutofidaxurinaz.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/r25g6thucm69efo75u67ibik1r/gapowedetuxevebunefipew.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/36810041936.pdfIn PDF document text
    • http://www.hon-ro.hu/userfiles/files/zuveniwavofekikijogibuv.pdfIn PDF document text
    • https://rt-totaalafbouw.nl/userfiles/file/99928605187.pdfIn PDF document text
    • http://mashhadgardi724.ir/basefile/mashhadgardi724/files/pinidakape.pdfIn PDF document text
    • http://schokozentrale.de/idata/83445936420.pdfIn PDF document text
    • https://china-glass-mosaic.vegner.com/userfiles/files/20210917_101332.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=biology+quiz+questions+and+answers+for+class+10PDF 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_off0000aee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEE1 16608 bytes
SHA-256: d33fe603060e078f8e855a89b3f11995defcebada7fa699a0f2ec22f4623df1e
font_01_sfnt_off0000d9a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A6 11384 bytes
SHA-256: b6644489093eb56388d547df8c8e6f2b1ccc4ae089987e28504cb9a01b2749e6
font_02_sfnt_off0000f453.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF453 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.