Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4e412b2e4ff1fb1…

MALICIOUS

PDF

70.3 KB Created: 2021-10-15 04:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5c68e234a6a02093348e829939f9fab5 SHA-1: 10d1657ff71f88b86422d9b7c6d505cad0062808 SHA-256: a4e412b2e4ff1fb19d5ff4b01c3559b0943add43027e25bf41792bc63e1e46ca
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It functions as a link farm, containing numerous embedded URLs that point to compromised CMS upload directories and disposable hosting. These links likely serve as lures for phishing attacks or to distribute further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8321

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 https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/c05d9451836d8a7ad7365e98d4c51645/movewolikikofekave.pdf In PDF document text
    • http://manilag.com/FileData/ckfinder/files/20211011_5CB550B7D74B631F.pdfIn PDF document text
    • http://ccadl.com/files/20211010130751.pdfIn PDF document text
    • https://asiquim.com/ckfinder/userfiles/files/62341141188.pdfIn PDF document text
    • https://jpt.mysmartedu.com/uploadimages/files/sufukolamibufezop.pdfIn PDF document text
    • http://vaonhaphatphap.com/images/uploads/files/setazumakotu.pdfIn PDF document text
    • http://novelinternationalschool.com/ckfinder/userfiles/files/75975852761.pdfIn PDF document text
    • https://facades-et-traditions.com/actualites/file/89566711552.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/26421974610.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1614b6cd89eef7---tawafugez.pdfIn PDF document text
    • http://vertex-decor.com/userfiles/file/37949069240.pdfIn PDF document text
    • http://bulmarconsult.com/files/38900181363.pdfIn PDF document text
    • http://bckvalumni.org/userfiles/file/doran.pdfIn PDF document text
    • http://jlm-kg.com/uploads/file/dexedubanosevibebonisa.pdfIn PDF document text
    • https://blogsma.com/files/bajomotaruvukerowete.pdfIn PDF document text
    • http://www.flamanville-76.fr/upload/file/36206980856.pdfIn PDF document text
    • https://livermore.com/wysiwygfiles/file/tejositunivu.pdfIn PDF document text
    • https://brianhigbielaw.com/UserFiles/file/68070873028.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/379458fc70f1b8bafcc729117a7fac01/1254086859.pdfIn PDF document text
    • https://organicfertilizerproduction.com/d/files/63747316653.pdfIn PDF document text
    • http://philboyd.com/94548186188.pdfIn PDF document text
    • http://surestegc.org/documentos/file/xelonezatiwoma.pdfIn PDF document text
    • http://globalbando.com/DATA/upload/files/202110091643277573.pdfIn PDF document text
    • https://motelandratecuci.ro/userfiles/file/62046182006.pdfIn PDF document text
    • https://dentinale.eu/wp-content/plugins/super-forms/uploads/php/files/3f0bf3eaea02f3be42c4c7419c55a73a/zenedurumirubofumorujep.pdfIn PDF document text
    • https://tradingphrases.com/userfiles/files/pajat.pdfIn PDF document text
    • http://feedproxy.google.com/~r/MbOu/~3/RC0zOYPQW8A/uplcv?utm_term=cubic+feet+to+litersPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7A8 17072 bytes
SHA-256: abfabb61a6cc9573bede2faf7303640dcd39bef565c807de684ddf0caf4e19cf
font_01_sfnt_off0001045e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1045E 10336 bytes
SHA-256: 69edebad50bbbb11e423fcf1222700f3cb9bdaf677e464275f4970a1f58764e2

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