Malicious PDF — malware analysis report

Static analysis result for SHA-256 abf830a57560400a…

MALICIOUS

PDF

80.0 KB Created: 2021-06-24 00:42:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 80ccbd91c775119da031fc224c9b93eb SHA-1: 6daf612d2ee81b17152148761132732f0e692bc9 SHA-256: abf830a57560400aad6deb3911179d77546045dd49b3697f88ecd5f8188763b1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress upload directories. These links likely serve as a lure to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9398

Heuristics 5

  • 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 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://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160829a0b45c17---41063377428.pdf In PDF document text
    • https://www.gasserbush.com/wp-content/plugins/super-forms/uploads/php/files/6503329d5b398d1ae165b6613af734fb/neborunidiw.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/xefimagororumizedigidof.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/e15c8d9ef1b12682abfc9ada346ee7e1/44669490657.pdfIn PDF document text
    • http://taiwanquinoafamily.com/shopadmin/upload/files/vitovelipemefofuxepuxu.pdfIn PDF document text
    • http://naturalmis.com/userfiles/file/21299641984.pdfIn PDF document text
    • http://placc.info/up_image/6142013019.pdfIn PDF document text
    • http://novaserv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ace8db18d12---waxuzatutiwom.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/wilixufez.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093b4cdf3813---vizalemopuvutata.pdfIn PDF document text
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1270fb8e3c---nevejepazaf.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/binikelajivudujixupurawo.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609a75bb5fbca---gukuberi.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/e9948d607d43118445362ea5ba0f2ee1/16415013057.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=the+girl+he+never+noticed+neilani+alejandrinoPDF link annotation

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