Malicious PDF — malware analysis report

Static analysis result for SHA-256 1737f2a894a16da4…

MALICIOUS

PDF

70.3 KB Created: 2021-09-01 17:37:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4eb3455337ab8d067c50aab1e8c5d69c SHA-1: a5042e7279f508dcdfae198c087fe1ea72c42fa1 SHA-256: 1737f2a894a16da4c1f90a8b68566075bdef6a3843dd73d562fd9cff58b55b00
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated maliciousness. Heuristics reveal it functions as a link farm, with multiple URLs pointing to compromised WordPress upload directories. These links are likely intended to redirect users to malicious sites for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7970

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://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/d6e3adc44c77939bca3a4150d4336db1/kivaxolijuneganoxelod.pdf In PDF document text
    • http://animationcoach.com/userfiles/file/kufegomi.pdfIn PDF document text
    • http://computerdoki.hu/user/file/mobejidugo.pdfIn PDF document text
    • https://led7.ru/file/54826639698.pdfIn PDF document text
    • https://formapolis.it/wp-content/plugins/super-forms/uploads/php/files/b5e87d504fb4297d0dad5782ce2f88dc/fuzulutevotilenov.pdfIn PDF document text
    • https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/as87nbguj8v0v96to456jeql34/japumimapolifupijipufen.pdfIn PDF document text
    • https://benchmarktransitions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ded630cfd6---94977928471.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089b91531be9---lafozux.pdfIn PDF document text
    • http://ankaraeksioglu.com/resimler/files/27103687438.pdfIn PDF document text
    • http://wardwrightself.com/clients/863644/File/muxesunaverufexifuvowen.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/2b9922996e2149ff309b17ca5f192efe/54684626838.pdfIn PDF document text
    • http://pascalparrot.com/uploads/assets/file/dipuvulozodune.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/e7ce7074b4254b93da2d7eca62c08b31/mulekekifuzapolaxoja.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608a833cac471---2285473093.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1607c607910439---guxisukinapapi.pdfIn PDF document text
    • http://qkmedica.com/uploads/userfiles/file/mepubasanadam.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/mofonuviriwogisabukunigi.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad367c6805---85357897480.pdfIn PDF document text
    • http://edwardlankin.com/clients/86087/File/96616828947.pdfIn PDF document text
    • http://dogalakustik.com/depo/sayfaresim/file/99644255246.pdfIn PDF document text
    • http://camionespanamericana.com/userfiles/file/71876786845.pdfIn PDF document text
    • http://bahtiyardishekimi.com/fckfiles/file/13944918895.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/d8dpfdi7acl2sfhg11lgjs4mv2/dimivemegavi.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/larini.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=numerology+life+path+7+meaningPDF 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_off0000d809.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD809 17500 bytes
SHA-256: 51da09c74dcf3dad57616ea0593f446285a0e84c80e78dc8a1c2c5d50d03be4a
font_01_sfnt_off00010555.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10555 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1