Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e27fdd8eeeda7fe…

MALICIOUS

PDF

73.4 KB Created: 2021-09-08 20:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 82f14c7d645c5a46e3b7387c1be19ca1 SHA-1: 9467891d017e5893e5f63d49072b46e7153be46a SHA-256: 8e27fdd8eeeda7fe06c442f1dd82e9c964b3508403793b942a9a8134e7e94905
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external URIs, many of which point to potentially compromised websites or disposable hosting, indicating a link farm designed to redirect users. The presence of ClamAV detection and ML classification as malicious further supports this assessment. While no scripts were explicitly extracted, the structure and numerous URLs suggest an attempt to deliver malicious content or phish users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5003

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://crysiq.ru/uplcv?utm_term=streptokinase+davis+pdf PDF link annotation
    • https://krzczonowice.pl/gfx/file/70783487585.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134cb20b60eb---63923297135.pdfIn PDF document text
    • http://argyleliquidations.com/userfiles/files/nuwoguzozaluvivoxeguvum.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/kimokubisedevine.pdfIn PDF document text
    • https://acconpriti.com/ckfinder/userfiles/files/73459668317.pdfIn PDF document text
    • http://ngnjl.com/userfiles/files/rasugarufixiwomebogo.pdfIn PDF document text
    • http://uktohabbarijamalta.com/files/file/pikajugabejaxete.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/zeneluvulolibafifuz.pdfIn PDF document text
    • http://naturestuff.nl/siteimages/file/32522007318.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021090511333914.pdfIn PDF document text
    • http://yao-cheng.com/uploadfiles/20210904180150.pdfIn PDF document text
    • http://campbellelectronics.com/uploads/woxawefobetukokubozix.pdfIn PDF document text
    • http://testplanet.nl/uploads/files/14045512799.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/kagokadoponutupabovex.pdfIn PDF document text
    • http://istanbulballoons.com/ckfinder/userfiles/files/rusakobepagajifolid.pdfIn PDF document text
    • http://kbautotech.com/board/datafiles/imagefile/tojegisujefapavu.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613660090d5b4---10607379958.pdfIn PDF document text
    • http://tecnoservizi.com/userfiles/files/26697557433.pdfIn PDF document text
    • https://lnpro.in/ckfinder/userfiles/files/76005001599.pdfIn PDF document text
    • https://cpsguffanti.com/uploads/file/44123774393.pdfIn PDF document text
    • http://140.121.180.103/ckfinder/userfiles/files/94542206596.pdfPDF link annotation
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16133c132c18aa---13236164732.pdfIn PDF document text
    • http://9y.bfage.com/upload/files/20210908182423.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/tefamokamuvomebuwageg.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138c46beeb71---15520271464.pdfIn PDF document text
    • http://harnettcountyhba.com/userfiles/file/49137936469.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e94f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE94F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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