Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e8f1f3ae2c0bf28…

MALICIOUS

PDF

41.5 KB Created: 2021-09-20 20:56:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: bbb5d32cd63d30bd34763a1a9540c2ff SHA-1: 81ada6ff2ada5ce081c71f7bd32ccaf2a34e04ab SHA-256: 1e8f1f3ae2c0bf281bcadab73eb80e4e3ba82b9a822a85d7df1d44c86af6fbe1
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF exhibits characteristics of a phishing lure, including a high ratio of images to text and embedded links. The presence of multiple links pointing to compromised CMS uploads and disposable hosting suggests an attempt to distribute malicious content or redirect users to phishing sites. Although no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate malicious intent, likely involving the exploitation of user trust via deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8035

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 41 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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
  • 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://b2bircruise.travflex.com/bot/ckfinder/uf/files/53398798020.pdf In PDF document text
    • https://kaunas.cvzona.lt/resources/img/files/53596186911.pdfIn PDF document text
    • https://conexkarvan.com/cache/fck_files/file/25300891577.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16138085a7f6da---13711538723.pdfIn PDF document text
    • http://tetraeng.it/userfiles/files/sagob.pdfIn PDF document text
    • https://igescanada.com/ckfinder/userfiles/files/51771311333.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/332e09f20baf948a5d516f7ab748993f/27195613840.pdfIn PDF document text
    • http://skupka54.ru/upload/m/82705349032.pdfIn PDF document text
    • http://www.tokyomagic.jp/images/library/File/mewewu.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/zexivuronozufigexozafu.pdfIn PDF document text
    • http://ekonopuntos.com/campannas/file/jusexokimaxulajivisapuref.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/furogusurunanoxew.pdfIn PDF document text
    • http://olsztyntransportmedyczny.pl/userfiles/file/mineluwakazixenavowibi.pdfIn PDF document text
    • http://ttfi.org/app/webroot/userfiles/file/46173427602.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/butewofodosunigu.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613032983f5b6---20518038702.pdfIn PDF document text
    • http://cancercareresearch.com/userfiles/file/gigejivogevoxefuf.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fdc6dd3719---padikomib.pdfIn PDF document text
    • http://www.miamiairportlimo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16134db5d301f5---tikizevaburotoketilu.pdfIn PDF document text
    • http://border-collie.ru/sites/default/files/file/26450526756.pdfIn PDF document text
    • http://shyjjc.com/v15/Upload/file/202191678353581.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=traditional+lofts+for+ironsPDF link annotation

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