Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2e966baab58a89b…

MALICIOUS

PDF

73.7 KB Created: 2021-09-07 23:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 166bb018488019085eb126b338b6930a SHA-1: fee708ae177177e078e7ea00597d285344c64cb7 SHA-256: d2e966baab58a89b03aa2e8ea430e384896772d8ad3e4aaf356f2e3ae8170126
156 Risk Score

Malware Insights

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

The PDF contains a large number of external URIs and link farm heuristics, indicating a phishing or scam attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs are likely used to redirect users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://chcial.ru/uplcv?utm_term=understanding+media+industries+lotz+pdf PDF link annotation
    • http://ubest.ru/images/file/dojawajavabedaga.pdfIn PDF document text
    • https://singlespeed-switzerland.ch/userfiles/files/40846760220.pdfIn PDF document text
    • http://lawngo.net/fckfiles/bagokam.pdfIn PDF document text
    • http://sdv.sk/userfiles/articles/file/36891684141.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/zawupiwazubaxamulo.pdfIn PDF document text
    • https://nhabe.com.vn/ckfinder/userfiles/files/dimatuxovomazo.pdfIn PDF document text
    • http://dungcubepgiangtrinh.com/webroot/img/files/tewumowebis.pdfIn PDF document text
    • http://bizwd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f9d6b76dc---pulopepusenebobel.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093f623b82c2---87890672506.pdfIn PDF document text
    • http://wagnerpc.com/userfiles/files/sutisez.pdfIn PDF document text
    • http://bezagsecurity.cz/userfiles/58254021601.pdfIn PDF document text
    • https://careerroots.net/ckfinder/userfiles/files/4610988211.pdfIn PDF document text
    • http://ketoanaca.com/uploads/image/files/lazebowud.pdfIn PDF document text
    • https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/rp9er62mld6tek8gmbgu1pl5a2/pifurosudofujabixowit.pdfIn PDF document text
    • http://etasystem.net/userfiles/files/5981119526.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/ff626e38a56328cf55f8a87821ac4f47/52148674945.pdfIn PDF document text
    • https://gameclub.by/uploads/files/siwalorazabawesedozipogi.pdfIn PDF document text
    • https://jamurgoreng.net/contents/files/54385760255.pdfIn PDF document text
    • http://www.telsercom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f73aa894622---wozesomexa.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a935f9676ae---60731007666.pdfIn PDF document text
    • https://proxus.nl/file/munonarijaxejawidu.pdfIn PDF document text
    • https://diedacorporation.net/freesiafiles/file/suxofupesuputitutoti.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/m63ct30rlgtdcv5g20gp0qlrtm/jikof.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/bomanesulugosuvad.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://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_off0000bdce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBDCE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d5e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD5E5 11008 bytes
SHA-256: 0e2e7b75d6520a94a29602bceb9cc0627121886fb3e6ae053fede3d939eb2766
font_02_sfnt_off0000ef45.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF45 16144 bytes
SHA-256: a466f774be5cfe3bcb49589bd8c1315a841c6a414125a04cccfc033c86892299

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