Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cab196b3625529f…

MALICIOUS

PDF

71.4 KB Created: 2021-08-12 03:20:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 617dbbe1beeda4516c01a482a83eb59d SHA-1: f12022ac4397d5ebc5128ef8b09b9eacca13633b SHA-256: 4cab196b3625529fc961ad66ae3c28ae61c44c096d55666d817e1de5a01045cb
154 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories or disposable hosting. This structure suggests the document functions as a link farm, likely intended to redirect users to malicious websites for phishing or malware delivery. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5357

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://clarklawtexas.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lomikozikodexikomekuvel.pdf In PDF document text
    • http://asu78.ru/userfiles/file/nipuxazabopobe.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/gajarubinolir.pdfIn PDF document text
    • http://superfasttv.com/uploads/files/maxajab.pdfIn PDF document text
    • https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/8e24174e0331960aae40f7cb728eced1/tepesawixe.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/pucupu0anplehbaa53a1khd102/xoleg.pdfIn PDF document text
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160abd1977ca48---wotanovowapewabe.pdfIn PDF document text
    • http://drwatsonsr.com/clients/2/2b/2b9a0cf27321ceab3a47fbd10bf94d34/File/tajedewe.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/160972bb94df28---2777527090.pdfIn PDF document text
    • https://www.travelticket.com.au/wp-content/plugins/super-forms/uploads/php/files/eht1gctrmbugocod9t5tfdbhpo/93533772828.pdfIn PDF document text
    • http://baovephuongtroi.com/vietkiendo/upload/file/46102727309.pdfIn PDF document text
    • http://sunnysidehighschoolclassof59.com/clients/867562/File/25532522813.pdfIn PDF document text
    • http://sellmysayarah.com/userfiles/files/51674227572.pdfIn PDF document text
    • http://fritz-fahrlaender.ch/download/rofokemobitureziravos.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a0168a83622---titipizawubuxovizonex.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/5af68704036ea8614bd1dedd02998deb/sugigaze.pdfIn PDF document text
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/sqib3mbum57n3o8s5p2m6visp8/62386727210.pdfIn PDF document text
    • http://lnianemarzenie.pl/userfiles/file/78743553103.pdfIn PDF document text
    • https://balaji-technology.com/userfiles/file/damuwefuzolibiwuj.pdfIn PDF document text
    • http://gyogytornasziget.hu/uploads/files/93716976185.pdfIn PDF document text
    • http://chrislahoda.ca/userfiles/file/11387408732.pdfIn PDF document text
    • http://hogan1973.com/clients/d/d4/d4eda5e2427b34f3a15374adde9a77da/File/difawojolugadujuzadod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=unit+1+geometry+basics+homework+1+answer+keyPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c3ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC3AB 11124 bytes
SHA-256: 820bb033e143bfa6355d4e703b2fba735b1a01141fe5d145f324c230fdd2bf60
font_01_sfnt_off0000dd9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD9B 16204 bytes
SHA-256: b46d49c227e346709126214c0991fea32a403245de6f6fc0e7d2c825a8c1b51a
font_02_sfnt_off00010764.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10764 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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