Malicious PDF — malware analysis report

Static analysis result for SHA-256 9eadd3afa8f2a94e…

MALICIOUS

PDF

92.0 KB Created: 2021-07-07 14:05:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 456e1e05f2da28bdd80f85ebc63c4332 SHA-1: ccf002970a7a0ad2748455fb3864001943458741 SHA-256: 9eadd3afa8f2a94eeebc33f1af3d001983c78a0314b2b73b158c79fa549e0e57
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/aa1e8a52537ad3626ef8714854d7e4a9/bujipatik.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16084634d37051---72405557104.pdf
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/9u5t5n3mhv6rmm0k7t94tk3gqf/1437423942.pdf
    • http://shmgec.com/Uploadfiles/files/72343625063.pdf
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4b35b556be---14209735132.pdf
    • http://ghalemdi.com/userfiles/file/86879752901.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/21009mbedlhn2andhpr21hi31v/99489601097.pdf
    • https://akapacha.com/userfiles/file/xakofi.pdf
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/3dfbp3opsekcc3at7uq620fjrb/juperefon.pdf
    • https://canadiancontractorservices.com/wp-content/plugins/super-forms/uploads/php/files/mhhehr819ro5ne7crcucec17g4/dazikafurujinufotite.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7574cc56a---waxazamogakovoxuzununuw.pdf
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606e76859863e---vunegugexokaxowejojejit.pdf
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/4ddf719eb67c9d5c8960fef6fb3eeb82/84047620688.pdf
    • https://atraba-holding.com/userfiles/file/29027464311.pdf
    • http://tutaylamhet.com/storage/ckfinder/files/jedadojor.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6a9f57926---radadavazepewekatera.pdf
    • https://ludifrance.fr/userfiles/file/jujiwezutuzun.pdf
    • https://prokoncept.hu/admin/blogfck/image/file/ruzekufamapatakejugejigex.pdf
    • http://topup-fight.com/ckfinder/userfiles/files/buzimaberatidaxelunadil.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/ca245999aa0df5e5cd14dfaf291993d1/82146523861.pdf
    • https://zegabilisim.com/calisma2/files/uploads/fufedawavevo.pdf
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d158d6820a---22731881321.pdf
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d16783fde8---jifaxelezovetegikuso.pdf
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160afe177616d3---kenegobal.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b98700336---saxewu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=assassin%27s+creed+origins+tombs
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010345.bin
4f855b1da8280c83b1cfa423be1a5e31b1bf5e72742702b8afd92a6294f2e5ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10345 10820 bytes
font_01_sfnt_off00011c19.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C19 16792 bytes
font_02_sfnt_off0001342b.bin
b85851086173184112e376656fc6e78905cd1da52dd8e2b825ffa6fe4fe4db0a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1342B 17608 bytes

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