Malicious PDF — malware analysis report

Static analysis result for SHA-256 69b745e9326e8b4b…

MALICIOUS

PDF

41.5 KB Created: 2021-09-03 21:47:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 43798f7b75af4a872966c8b8838f3c21 SHA-1: 25342f8803ac6abb280a110a68da385307edfff2 SHA-256: 69b745e9326e8b4b76b7667bbea10c2b9d7e0761bff381824270a3a72e0be9d8
214 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as an image-only lure, a common tactic for phishing. It contains numerous links, many pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content. The ClamAV detection and ML classifier further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and link farm indicate a likely intent to redirect users to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7348

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://marwaautorepair.com/nbloom/fckuploads/file/towubudigifogowu.pdf In PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/a3qdo8l94l0djnpg3unrmg6016/wosaragipabimusezez.pdfIn PDF document text
    • http://psychanalyste-gard.fr/ckfinder/userfiles/files/ravisozet.pdfIn PDF document text
    • http://ciaomamma.hu/editor_up/zorodosipuvokoxux.pdfIn PDF document text
    • https://digbijoynath.in/iisc/ckfinder/uploads/userfiles/files/nobivu.pdfIn PDF document text
    • https://conexkarvan.com/cache/fck_files/file/gupadikivabufiki.pdfIn PDF document text
    • http://come2menorca.com/images/file/99538174490.pdfIn PDF document text
    • http://cluboutletmoto.net/campannas/file/54264626198.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609da42063e9a---44913043949.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/77269858061.pdfIn PDF document text
    • https://buddingheights.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a17fe6b5bec---dololugo.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/xizexowopetisodatuka.pdfIn PDF document text
    • http://vamaconsulting.sk/userfiles/file/82558025363.pdfIn PDF document text
    • https://www.totspotdaynursery.co.uk/ckfinder/userfiles/files/pukasir.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fb3aa3fad1---43174001813.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/c8n2ddr8uq7cte4egq586je3om/74267610476.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/limor.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/2672145992.pdfIn PDF document text
    • http://bronia.org/userfiles/file/navuronuzimapimeborolez.pdfIn PDF document text
    • http://artistalexanderkanevskywinnerinternationalaward.com/clientMedia/file/51457315750.pdfIn PDF document text
    • https://actaviaserica.org/board/file/files/tikarifijebi.pdfIn PDF document text
    • http://ch-bovi.com/upload/files/zexidebasogenenajekulane.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16131d39c10107---perobo.pdfIn PDF document text
    • http://baaningdoi.com/file_media/file_image/file/ramofovisitude.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=defect+liability+period+in+construction+project+pdfPDF link annotation

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