Malicious PDF — malware analysis report

Static analysis result for SHA-256 adcc221bc9fa57ca…

MALICIOUS

PDF

70.3 KB Created: 2021-09-05 23:53:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 044f85003a94eaace90923eed0f428a4 SHA-1: 7f453a2275706d93fbe8892af2989120a30f863a SHA-256: adcc221bc9fa57cab8239dd6e4ff31e13ead82156ec5e2352339b05661dcb14f
124 Risk Score

Malware Insights

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

The PDF file contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The file's structure and embedded URLs indicate it's designed to lure users to external, potentially compromised, resources.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4326

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://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bb1b6c4113d---dibun.pdf In PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/6d15af8299b5b648542dcd5ff0fd02ef/xifanosixidusanif.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/16074fc42e042e---xenupifapedowap.pdfIn PDF document text
    • https://bmat.mn/uploads/ckfinder/files/91694399592.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/xinijufatijafiwesorar.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a3da1c05e31---pokesin.pdfIn PDF document text
    • http://www.mbk-montage.nl/ckfinder/userfiles/files/25108908610.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16086dfbd0eb93---vuvolotezedimapapevone.pdfIn PDF document text
    • http://aweibel.com/Photo/file/jorujoraguda.pdfIn PDF document text
    • http://gdgom.com/upload/file/2107222051573789866njvgv66yoc5.pdfIn PDF document text
    • http://deshdunya.com/blogimage/file/tenafi.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607328d5345d9---xajidimujowi.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608dd67962a4a---46257042809.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160bab108a0d83---8179577995.pdfIn PDF document text
    • http://wami.cc/data/files/bijinoguxedigijana.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/5fee39cfb9951f29b15ef6caedcc2b5e/60407755305.pdfIn PDF document text
    • http://accronline.com/userfiles/file/81984956292.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/79965518303.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/ad436f9a8586b4147e38693c55251d23/lusirufopuxi.pdfIn PDF document text
    • https://ssvacancy.com/ckfinder/userfiles/files/tanexogod.pdfIn PDF document text
    • https://art-gallery.mn/uploads/files/84661286589.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/80778742115.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/16094843b78e85---jonesuxugibiposufi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=maharashtra+urban+land+ceiling+act+1976+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_off0000e497.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE497 11448 bytes
SHA-256: 68b49e640e0bffff3695898aedad8615c5e635f039491cb966675ab149e8cd4c
font_01_sfnt_off0000ff34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF34 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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