Malicious PDF — malware analysis report

Static analysis result for SHA-256 1687854515e3cfbe…

MALICIOUS

PDF

96.1 KB Created: 2021-09-21 02:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1cf82016721db6ba7dc1b5774f490a6f SHA-1: 61fc4a84940877a167c0759f7aaa9d46eff58d7e SHA-256: 1687854515e3cfbe858dec92392af66abdab8b608d73a3f66775405f1965690c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the nature of the embedded links and the PDF structure suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://pistant.ru/uplcv?utm_term=ultimate+car+driving+simulator+mod+apk+all+cars+unlocked PDF link annotation
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613d183151d98---11744768069.pdfIn PDF document text
    • http://kpotplace.com/uploads/files/72186129225.pdfIn PDF document text
    • http://vinczeandlaszlo.com/upload/gemomuj.pdfIn PDF document text
    • http://togclick.com/media/userFckfiles/file/rokibepilexosapifo.pdfIn PDF document text
    • http://elvirajogsi.hu/ckfinder/userfiles/files/18472035208.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161363a2141854---rejugij.pdfIn PDF document text
    • https://gobelsprofil.com/upload/files/ririxubabeweb.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613780d41bd81---ridokobosi.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/rumojanetidafodanasuridew.pdfIn PDF document text
    • https://bluza-shop.ru/content/File/nibunaz.pdfIn PDF document text
    • http://ibtaker.ps/userfiles/file/janubuxekomazudu.pdfIn PDF document text
    • https://kop-trans.pl/uploads/userfiles/files/xutobevul.pdfIn PDF document text
    • http://cissi.it/userfiles/files/14929553296.pdfIn PDF document text
    • https://rippa.pt/files/file/kitazinutu.pdfIn PDF document text
    • http://forma8.kz/ckfinder/userfiles/files/pivefoneludewomezufuf.pdfIn PDF document text
    • https://farmaciasacoor.com/site/upload/file/guruwazonesarefekavuj.pdfIn PDF document text
    • http://kramor.bg/userfiles/file/75990786516.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/moxib.pdfIn PDF document text
    • https://viettincapital.vn/upload/files/wulamisexovorefix.pdfIn PDF document text
    • https://ozsersogutma.com/upload/files/mitotidatotunibubunajama.pdfIn PDF document text
    • http://tuanlongland.com/upload/files/63774495021.pdfIn PDF document text
    • http://gotween.com/userfiles/file///28792100357.pdfIn PDF document text
    • https://inprovitperu.com/ckfinder/userfiles/files/96772836031.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/13351359787.pdfIn PDF document text
    • http://mellorymotors.ru/admin/ckfinder/userfiles/files/29271475558.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_off000111a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A2 11124 bytes
SHA-256: e5493ea91822b6c80cc6c24810a8d94eee7cb2265510184bd247fb024aace937
font_01_sfnt_off00012b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B5D 17720 bytes
SHA-256: 7d2500c7e731b89349e3027df901abe38118c90b7d4d400eaef2a8d7d2f9d5b6
font_02_sfnt_off0001599e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1599E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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