Malicious PDF — malware analysis report

Static analysis result for SHA-256 db63e7f0da105d72…

MALICIOUS

PDF

41.6 KB Created: 2021-09-12 19:07:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bf020d48c4b02e4296cbbb1ce4b46bcb SHA-1: ee2d798660e7ef3cf3a478f45f2b2df3d7c06084 SHA-256: db63e7f0da105d72049a8ea3b777c3f1f0852c3e37d6227f2a81ce1aed065046
174 Risk Score

Malware Insights

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

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable links. Several heuristics indicate it's a link farm hosted on potentially compromised or disposable domains, designed to redirect users. The ClamAV detection and ML classifier further support its malicious classification, likely as a trojan downloader or phishing document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7349

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://floridagreatescape.com/media/file/80755827029.pdf In PDF document text
    • http://interstyle.org/content/xuploadimages/file/mobifulevuzateli.pdfIn PDF document text
    • http://bodybybodyology.com/ckfinder/userfiles/files/86086678941.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136e5068b59d---tujasosifi.pdfIn PDF document text
    • https://ecoverservice.be/gallery/file/jivigorobusedalujonoxeba.pdfIn PDF document text
    • https://eurochen.com/UpFiles/WebEditorFiles/file/wogowifaravixopuj.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/vixotuvesitojarane.pdfIn PDF document text
    • http://gewidor-gmbh.de/uploads/files/wogananin.pdfIn PDF document text
    • http://cn-polylysine.com/d/files/49264886017.pdfIn PDF document text
    • http://gostinica-domodedovo.ru/files/59980399433.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16138b8f7a7ff7---didajosegoxuzijobubovezuv.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/sidebatazik.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d0f014deee---79843616868.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/75735297590.pdfIn PDF document text
    • http://boston.pl/fck_pliki/file/43012186004.pdfIn PDF document text
    • https://associazionemusicaviva.it/uploads/file/kugebuxezalazupivofuvidem.pdfIn PDF document text
    • http://redemaisfarma.com/userfiles/file/85370195145.pdfIn PDF document text
    • http://jubangh.com/Upload/FckUpload/20210902file///sapozusupifixarufevasedo.pdfIn PDF document text
    • http://kieryk.pl/img/userfiles/file/67275639241.pdfIn PDF document text
    • http://studiotravenzolo.it/userfiles/files/tujiwa.pdfIn PDF document text
    • https://ceylanotel.com/firma/files/zafuxi.pdfIn PDF document text
    • https://hsse.hssanesteban.cl/files/63177937035.pdfIn PDF document text
    • http://kondicionery-ivanteevka.ru/upload_picture/file/fewuxuxotokomi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=how+do+you+transfer+data+from+iphone+to+androidPDF link annotation

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