Malicious PDF — malware analysis report

Static analysis result for SHA-256 430e7ecd62c1b339…

MALICIOUS

PDF

104.4 KB Created: 2021-08-08 04:29:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 5b222ed6389422188fd4a479ec646bb6 SHA-1: c922429344d5d5305d9d81d8edde009c148dd4e1 SHA-256: 430e7ecd62c1b3397bba4ed374840be699e9281069fb8c7c29e9477fa526ae3c
154 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs and link farms hosted on potentially compromised or disposable domains, suggesting it's designed to redirect users to malicious sites. The presence of multiple PDF link farm heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9048

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://drafthe.ru/uplcv?utm_term=vinnaithandi+varuvaya+full+movie+hd PDF link annotation
    • http://irk-yoga.ru/upload/files/67235465918.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles//files/18771977150.pdfIn PDF document text
    • http://meyergarden.com/ckfinder/userfiles/files/rupujezubimetiluvut.pdfIn PDF document text
    • http://bfr-bialapodlaska.pl/userfiles/file/59315345969.pdfIn PDF document text
    • https://sk-developers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed2beceb8ee---14635977336.pdfIn PDF document text
    • http://russkiivopros.com/images/FCKeditor/file/vowuxesabitajidenaw.pdfIn PDF document text
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5e4237574---98731367127.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/g021cnv1ur9tveur4df8g3mnt2/87913648119.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/wixateku.pdfIn PDF document text
    • http://eastcoastbiker.de/sites/default/files/file/wenafotojoberojuwewudasus.pdfIn PDF document text
    • http://teaterskolen-efteruddannelsen.dk/ckfinder/userfiles/files/lopukafafujapasotesur.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/4obkdjg4nda242nl7q1qveri84/28921152625.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/q8f7dqtra1arkcpmfmq2k9lmgu/xitudodiwapemes.pdfIn PDF document text
    • http://qapoll.com/2015/vat/upload/files/52474467037.pdfIn PDF document text
    • http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/ll1mlj49mta1kc3kbc6rhei931/80298553986.pdfIn PDF document text
    • http://sushiloverca.com/uploads/files/52191236551.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/t5pvtmee7pb3c5af0d1i0pb6a3/55203462765.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/d36cf0f684cd9f595ad39e1c8af762e1/sunigupos.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/jowusudib.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/f07fa7f468bafab13fe6e69ee799cc5a/lelumigus.pdfIn PDF document text
    • http://novosib-sport.ru/ckfinder/userfiles/files/47735572673.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a241fc23721---weforagexepuj.pdfIn PDF document text
    • http://dabaizhongxue.com/upload_fck/file/2021-5-22/20210522001346337519.pdfIn PDF document text
    • http://mxm-hosting.nl/img/editor/file/94609448582.pdfIn PDF document text
    • 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_off00013ddb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DDB 21136 bytes
SHA-256: ff8bcdc456ef5b8c15b80069d4c8636cf1af5c6adaaf8cad351cc00535be7292
font_01_sfnt_off00017386.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17386 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00018b9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B9D 10700 bytes
SHA-256: 5ec48760c7ca7404e1d04419306888e51e6060d619de03353f37a6a6dcf2caef