Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb32b150459bf3b3…

MALICIOUS

PDF

106.0 KB Created: 2021-07-25 17:02:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2c6470458586b8e51a94912c3466e6e2 SHA-1: d6f2d3185d547957da6b2482f49f631fb7242f1f SHA-256: eb32b150459bf3b3e9b14efdb674d186319f896ef9839ef80586b91b2dcf126d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised websites and disposable hosting. The primary purpose appears to be directing users to potentially malicious content or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://oletrans.sk/editor_uploads/files/31500166720.pdf In PDF document text
    • http://www.grupohk.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b12e38fcb---jokesimuwanipag.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-16/20210516102420735664.pdfIn PDF document text
    • http://permianhighschool1970.com/clients/e/ef/efee9fcbc667252fc4b649c8163d3733/File/bojojibeg.pdfIn PDF document text
    • http://nano-vip.com/ckfinder/userfiles/files/zevikenizadodukeluvuvixi.pdfIn PDF document text
    • https://kermoulin.com/userfiles/file/jevemuxolawo.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/69008794127.pdfIn PDF document text
    • http://polskienarty.pl/data/aktualnosci_imgs/file/zimotajinugaruwudijakipu.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/16083661998d6b---jasiz.pdfIn PDF document text
    • https://noukos.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160a267cb50f95---fikefozijav.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/vuponepebabepowokewurolo.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076f7961d43b---nirimudadabusadez.pdfIn PDF document text
    • http://art-lan.ru/uploads/assets/file/wawokan.pdfIn PDF document text
    • http://mitcostruttori.it/userfiles/files/javol.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16099086f0493a---zamokapoduxapowejob.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/ec12e8a8b5547646a92116b82205ce18/wigexuredofojawat.pdfIn PDF document text
    • http://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608de95dda671---28218623175.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/am479uq5p78gfarigpepm8iubj/17520188391.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/qni89d0trqub8aj1huti07gtef/xofezajuruxazo.pdfIn PDF document text
    • https://www.andyselfstorage.co.uk/wp-content/plugins/super-forms/uploads/php/files/n86kld85751n3lehi0h0ve6jf9/fetavese.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c62fca4a9d1---xakasoxutajemuwozujaloz.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093dd4118383---rediviboxetadiv.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4f10cfc56---timinopotu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=bridgerton+soundtrack+episode+1PDF 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_off000137ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x137CE 18012 bytes
SHA-256: 78886f706268f4ef238081b47efce7ff0def5bab912733ae08f7c1ef8bfd21e0
font_01_sfnt_off000166ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166AD 10940 bytes
SHA-256: 069cdb31122432a438087bee552e5bb0e513872e580e53b209e694817f069925
font_02_sfnt_off00018011.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18011 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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