Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a544ef6d605cdc9…

MALICIOUS

PDF

95.4 KB Created: 2021-09-03 20:13:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 34f4e82e3df66e7bff24a6be5c19711f SHA-1: ee3b770a75b1ed954e31e27cba3612c1b2f1dd03 SHA-256: 8a544ef6d605cdc9da9b85e66520a46c6014f56e653d41b774297cf7cee1e183
124 Risk Score

Malware Insights

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

The PDF file contains a significant number of links pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely to lure users to phishing sites or download further malware. The presence of a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier clean score 0.2156

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://aldara-latinoamerica.com/userfiles/file/64279000787.pdf In PDF document text
    • http://hzqzg.com/d/files/fetutorusozizawilev.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/filigejesuxa.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16084f3c166683---93770122848.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/864098d4a40eb3d1e584f5ecde6d1287/63250429939.pdfIn PDF document text
    • https://zbmbudomont.pl/userfiles/file/pinedegazat.pdfIn PDF document text
    • http://ros-grad.ru/fck_editor_files/files/99264271230.pdfIn PDF document text
    • https://walnutcreekguide.com/wysiwygfiles/file/23408693168.pdfIn PDF document text
    • http://changrung.com/ckfinder/userfiles/files/xuzofiboziwuj.pdfIn PDF document text
    • http://gmicropilotes.com/uploads/files/gubolijukipululimovimo.pdfIn PDF document text
    • http://rtm-plus.com/ckfinder/userfiles/files/33479713907.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4ed918336---luroxanupuzelugor.pdfIn PDF document text
    • http://newtop-eg.com/userfiles/file/fafabifawuk.pdfIn PDF document text
    • https://nothingbutsafetyglasses.com/userfiles/file/wamefigado.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/uq2eu545i876uj81gg7fptau43/tiretenite.pdfIn PDF document text
    • http://zamokugrofa.sk/admin/fckeditor/file/binapivogotanedeviwazalob.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087e8b475226---41282479762.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/hmj0ubbafj51430ek6enk5oui1/jalolapejub.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/tijurijibop.pdfIn PDF document text
    • https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/5a32597268d509f05d112a489c057c14/44498882309.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/f785b524e526c042ad9ff6adca8860a4/funukulezeweke.pdfIn PDF document text
    • http://ahzycw.com/upload_fck/file/2021-8-16/20210816154545667753.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff9d77a742---55834855539.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=livro+de+romeu+tuma+junior+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_off000145df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145DF 10696 bytes
SHA-256: 60362babdb94f34354a7962157366bfea72b10d84847b223804c57b2a586eb6a
font_01_sfnt_off00015e5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15E5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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