Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a3418cf8a564647…

MALICIOUS

PDF

71.5 KB Created: 2021-09-04 15:29:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 1c4201399322a7f9a314da997e1c13be SHA-1: b0362a7611743eb8e6a2ee72cda4ed41f9187fe7 SHA-256: 0a3418cf8a5646478e8b9742eb7af9fae141dfd798d5e29c645b0d4adbc26eee
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the nature of the links and the 'link farm' heuristics point towards an attempt to lead users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6881

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://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/m02579q7f7fhudlp0tpuojjhg1/nufobusosudowinineb.pdf In PDF document text
    • http://servis-hradec.cz/files/file/70520495456.pdfIn PDF document text
    • http://remont-etalon.ru/upload/files/35015476640.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/l2b66uesdjd620favaacv8dfnj/sewajokupusaruzorisu.pdfIn PDF document text
    • http://simoncaulkin.com/images/99494795862.pdfIn PDF document text
    • https://razdolle.by/wp-content/plugins/super-forms/uploads/php/files/b65uusag1u8d0hu59s5dpgf831/22749060809.pdfIn PDF document text
    • http://sarljarry.fr/userfiles/file/maxipuxegizubuvuzu.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ded34b3d4c---pelipibupubi.pdfIn PDF document text
    • https://www.swissfillon.com/wp-content/plugins/super-forms/uploads/php/files/c7289446bbb734c090d52a7b26a3ca0d/nizavijipiganamu.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/pumoxojiburufa.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/3633c73301e71e7c784fe2d276eb4846/84223468398.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1611b7304349a5---narijexekasikopukumofodug.pdfIn PDF document text
    • https://neoville.ru/wp-content/plugins/super-forms/uploads/php/files/49f209611a8c5e9863fb1899e3752c5e/kajelawepe.pdfIn PDF document text
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/18kdivdjq71c7tms47licnl7i4/72696363049.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/7eb9ca6f2e706592c9431f52b9a56300/77998848124.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/wikajexobulebijegaponuk.pdfIn PDF document text
    • https://anukulagrotech.com/ci/userfiles/files/68630276423.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/57958224972.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/16082985fd1811---tazelavipisipa.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/2lob0714cknjq4q1a09hf89qo1/jojilobomutiwupogemo.pdfIn PDF document text
    • http://billsky.ee/files/file/54545082987.pdfIn PDF document text
    • https://groupburuemas1.com/contents//files/33525151318.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=laboratory+report+writing+format+pdfPDF 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_off0000d64a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD64A 18672 bytes
SHA-256: b6cc61c636063f114f6918aa6ebf7aa555473b44dad67fb23e80baf8c0e2d3f4
font_01_sfnt_off0001063d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1063D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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