Malicious PDF — malware analysis report

Static analysis result for SHA-256 5945281edf80fca3…

MALICIOUS

PDF

194.3 KB Created: 2021-06-13 03:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 3621f5527aa66c606d35003fd75bddf1 SHA-1: e6e39a6476f8355d40e2abd49b76cb4ff692ea61 SHA-256: 5945281edf80fca3de5cd24fc0a5fef41f910889774c4fd7ba372d2b9b2cbcf2
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to redirect users. The presence of 'utm_term=123 minecraft unblocked' in one URL indicates a lure to attract users interested in gaming. ClamAV and ML classifiers confirm the malicious nature of the PDF, identifying it as a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 https://smidgel.ru/uplcv?utm_term=123+minecraft+unblocked PDF link annotation
    • https://dixietemporarystorage.com/wp-content/plugins/super-forms/uploads/php/files/aecef590cf8381a772686d7735f76f01/74540750892.pdfIn PDF document text
    • http://glenbrooksouth1970.com/clients/1/17/17fc1bd13d5538a69f39d58c869d2fc5/File/19367160064.pdfIn PDF document text
    • https://wavesmaroochydore.com/wp-content/plugins/super-forms/uploads/php/files/4ii5husn3hf542dasc9e1nm3dr/mowamiwelezejurugo.pdfIn PDF document text
    • http://banghaija.com/userfiles/file/dubefubufegidanepive.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a567a8cd98c---33781852542.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b29ba6eaf86---sinipopitalunu.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082f04a7fc91---74523647145.pdfIn PDF document text
    • https://landlorddebtadvisory.com/wp-content/plugins/super-forms/uploads/php/files/gt70i3is10fvq25gl2hr245t85/71238391240.pdfIn PDF document text
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/7e00877c1e2a2deb5197bffe5fb11f64/jugifofonokukolemalulupa.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099acb2267fd---sosogarude.pdfIn PDF document text
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160942e97cfbc9---tanevo.pdfIn PDF document text
    • https://infoenergie-loire.org/userfiles/file/27193321988.pdfIn PDF document text
    • http://starwindows.ie/ckfinder/userfiles/files/71390285020.pdfIn PDF document text
    • http://www.gaviprintpack.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c3caeeebcf4---90751678792.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd3d4a7bd2---99247647240.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160bb683ca6099---16074397094.pdfIn PDF document text
    • https://rockyshairsalon.com/wp-content/plugins/super-forms/uploads/php/files/83oa727rfqurld9p7c22nkh9ua/85826301940.pdfIn PDF document text
    • http://zonweringnederland.com/ckfinder/userfiles/files/vaguben.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002730a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2730A 15172 bytes
SHA-256: 5e579c23de5f7e733f05bcd02716961352272996ed931f234dd76c47bc6771fb
font_01_sfnt_off0002a4e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2A4E8 5444 bytes
SHA-256: 17f9258b2558f4ae486a190c59234634e9aa5d96bd69bac81a809a1945d9c8f7
font_02_sfnt_off0002b75a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B75A 13832 bytes
SHA-256: d2f4e028060e78234b3da3713b8defa39ca5646999cf624ad63a2268179ea64d
font_03_sfnt_off0002e4d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E4D9 16112 bytes
SHA-256: e9f71365a2a9ea4b152c2f6701d7ccf33f67bf216d443f7f7b47b7c3311bc682

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