Malicious PDF — malware analysis report

Static analysis result for SHA-256 73d98f317761e82c…

MALICIOUS

PDF

54.0 KB Created: 2021-09-18 03:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 8b13bc5a31cb306d9e0eb4248c51b540 SHA-1: 473e3d556e1d20396601947fe2310468bf372b7b SHA-256: 73d98f317761e82c810a0600df91fba9f4b308fd999fce0dc950932e29d797e2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress uploads and disposable hosting, indicating an attempt to distribute malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent. Although no scripts were extracted, the structure and URL patterns suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3429

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 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.
  • 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 http://antitumor.org/filespath/files/20210908042855.pdf In PDF document text
    • https://pmcp-avac.com/files/upload-ckfinder/files/98516627904.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141e4640c6bf---vulawewuv.pdfIn PDF document text
    • http://skazka76.ru/pic/userfile/58050684496.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac83fbb436---8598012446.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/52500614613.pdfIn PDF document text
    • https://misbahelmudii.org/ckfinder/userfiles/files/17996375980.pdfIn PDF document text
    • http://saveursetsavoirs.fr/image/file/46963473397.pdfIn PDF document text
    • http://studiomarcheluzzo.it/userfiles/files/tibemofitosuxikumogi.pdfIn PDF document text
    • https://am-system.eu/ckfinder/userfiles/files/ratavaperimaxew.pdfIn PDF document text
    • http://aajude.pt/backoffice/ckfinder/userfiles/files/jizedadosu.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/60450884270.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161344f0718c8d---62558346132.pdfIn PDF document text
    • http://german-ex.com/images/blog/file/69008843389.pdfIn PDF document text
    • https://menu2uplus.com/images/file/kesipelavuvefegimugopimod.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16145147b24af6---29233121761.pdfIn PDF document text
    • http://xn--80aesyq.xn--p1ai/files/file/wagefenomi.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/poc3e2dme8j6n20s4nk8neqb80/16036173922.pdfIn PDF document text
    • https://sofahatinh.com/upload/files/diwijedisixisafidonawada.pdfIn PDF document text
    • http://eko-baby.ru/userfiles/file/zaponunazobafoja.pdfIn PDF document text
    • http://goldendoodlesofthesierranevadas.com/userfiles/file/23944910180.pdfIn PDF document text
    • http://ipmarketing.net/FCKeditor/editor/filemanager/connectors/userfiles/file/xevute.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/jukoxowamijobusopadugope.pdfIn PDF document text
    • https://mimpidia.com/contents/files/13387353881.pdfIn PDF document text
    • https://habibitours.net/ckfinder/userfiles/files/foredajolupe.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee66b57655---xezixekutozasofuwaloxarel.pdfIn PDF document text
    • https://samsungklima.net/upload/ckfinder/files/96151726722.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=change+phone+from+android+to+iphonePDF link annotation

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