Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0bef8d6609314f1…

MALICIOUS

PDF

87.4 KB Created: 2021-09-20 16:19:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 50a641c86fa84807763fff86d8c20b45 SHA-1: 590285cdcde770fee1a1d10c073290a689952388 SHA-256: d0bef8d6609314f174aa7b038a1b06d37eacbdc7823f49411867bbe4b35ffd97
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The file is a PDF containing embedded JavaScript and a significant number of external URIs. The heuristics indicate that the PDF is part of a link farm hosted on disposable or compromised domains, with one specific URI pointing to a compromised WordPress upload. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely related to phishing or malware delivery via the embedded JavaScript and external links.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4658

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://garglob.ru/uplcv?utm_term=wonder+woman+1984+cely+film PDF link annotation
    • http://xn--9i1b14l32gg2dsybq3b.com/upload/fckeditor/file/kobadixifunuxonexugeku.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613eda57adc05---misera.pdfIn PDF document text
    • https://gulfsupremesa.com/ckfinder/userfiles/files/webexufuwan.pdfIn PDF document text
    • http://longtra.vn/userfiles/file/vivibugekij.pdfIn PDF document text
    • https://pastelbuilders.com/userfiles/file/39026489785.pdfIn PDF document text
    • http://www.portofmiamitunnel.com/system/js/back/ckfinder/userfiles/files/42848766145.pdfIn PDF document text
    • https://businesslife.com/content/files/52858103555.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/rogaranijanomik.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210910211106.pdfIn PDF document text
    • http://drivingtesttips.ie/fckeditor/userfiles/file/nilabovanagudogivolufolab.pdfIn PDF document text
    • http://ekopaczka.pl/imgbrama/files/vivokelufax.pdfIn PDF document text
    • http://pampa.be/uploads/userfiles/files/bobukus.pdfIn PDF document text
    • https://robustbrakes.com/administrator/imagetemp/file/vurozuxo.pdfIn PDF document text
    • https://anyimaker.com/upload/users/files/28332188469.pdfIn PDF document text
    • http://xn--eyt274i.com/upload/files/juxawovefawesowu.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///62613178370.pdfIn PDF document text
    • https://champion-osk.pl/userfiles/file/88271572141.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/67719063757.pdfIn PDF document text
    • http://www.kotolantopeni.cz/files/vodenikemefuriwivopijexu.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16146b8619b442---bitapudaxutoranafesuzopu.pdfIn PDF document text
    • http://counterreaction.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614120cdbe62e---vifadewexezekixuwavir.pdfIn PDF document text
    • http://www.colormotion.cz/UserFiles/file/tomefasipudapujituva.pdfIn PDF document text
    • http://ativn.com/upload/file/felatedemukamejos.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/bptfe5t4c6decc57ju66bk5j61/gaxabupesuziwufup.pdfIn PDF document text
    • https://stancijanegrin.com/userfiles/file/tedagulumuximozuvipebana.pdfIn PDF document text
    • https://egf.tw/test2/images/file/ralarajuw.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/161463128829e8---28319090569.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011662.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11662 19884 bytes
SHA-256: 9c0b2433645b36325cf387d4c8c4546f9ca8fcae9011c8f9bc149f9ce3cd5da6