Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b44758f96f4f123…

MALICIOUS

PDF

83.8 KB Created: 2021-07-27 22:57:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4c8a946f08380afca0cf4b79c75804e9 SHA-1: dccea1eee218fe2235edef2fb1b84511c43c9e77 SHA-256: 8b44758f96f4f1234e5424e6faccbba6e10dcc6dffc89ff06b226b94d40d0cdd
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains numerous links to external websites, many of which are hosted on compromised WordPress sites or disposable domains, indicating a link farm designed to redirect users to malicious content. The PDF structure and link farm behavior suggest it's used to distribute phishing lures or malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3253

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://birzebbugastpetersfc.com/files/file/36722128228.pdf In PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/rnnqe50fpgg9gmf4cnimal0n8o/65065078627.pdfIn PDF document text
    • http://huiking.cn/uploads/file/180211397779.pdfIn PDF document text
    • https://www.analfissur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f13a083e6e---vuwujinefesami.pdfIn PDF document text
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070a46ebd96c---pegubalupupisizoronesa.pdfIn PDF document text
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/e66c3801ae094cbdb5fe004367a4e481/dereset.pdfIn PDF document text
    • https://www.zulilighting.com/wp-content/plugins/super-forms/uploads/php/files/d3e759fde62198590b762dc8b70f7df2/mifoxetenur.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/156304999f5d252b81b2762d12c6caa4/panujaxobiren.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/fe5838f274ed8807b0b9cd19a0dca74d/44081425664.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af32970130---72595915906.pdfIn PDF document text
    • https://alkalacarservice.com/public_html/userfiles/file/divosowavimaba.pdfIn PDF document text
    • http://gioiacompany.net/images/upload/file/rimiwizevesavokomulira.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/d4jbh716jh6nhn9pus5a9i2psl/saxatarefitusesarixas.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/c8b550d0acdbc0651c3f360beaf319ef/topimo.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/2be74d197660eef1150c5d14a46ce078/mowir.pdfIn PDF document text
    • http://arlingtonhigh1961.com/clients/e/ef/ef36f0800c0a5d5a0b00d5ecc8c3c6da/File/gudojedefepuvefot.pdfIn PDF document text
    • http://agama-rc.com/upload/files/sujoreviregagowodokupama.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/3lot3hri35bfn2sqrd1keou543/82587155119.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/e9b7a1a89fd4bb834cc8351a336a61d6/26496884459.pdfIn PDF document text
    • https://businessservicesuk.com/userfiles/file/58844594120.pdfIn PDF document text
    • http://hiddenroots.org/clients/19739/File/podexudal.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160cd8a8e8d48a---kutamugejosepawasot.pdfIn PDF document text
    • https://opescom-store.com/uploads/FCK_files/file/pububinilar.pdfIn PDF document text
    • https://mma-montessori.com/admin/ckfinder/userfiles/files/roluwuminipopatevewixi.pdfIn PDF document text
    • http://bscsaoner.in/ckfinder/userfiles/files/golimajek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=onn+wireless+charging+pad+compatibilityPDF 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_off00010280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10280 11324 bytes
SHA-256: 84b3868304680c6623b4efcec31764b2d892b87f7492c96ec23b59edff946660
font_01_sfnt_off00011c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C9F 17768 bytes
SHA-256: fd6f19fe9c06c2abcb1225e5d28a254bbd958f6161dae7ae5af5d87cea54ec5d