Malicious PDF — malware analysis report

Static analysis result for SHA-256 d07d5f4e7bdb0921…

MALICIOUS

PDF

72.3 KB Created: 2021-09-01 00:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 5df080ac87f60a5aae93cc0928948ca8 SHA-1: c38e573e371f1917dd995a126c72c1502118dfe2 SHA-256: d07d5f4e7bdb0921530eec6e37fe6e921b616eeb0e4a9b9988b98c3ff1d52c86
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous external links, many pointing to compromised WordPress upload directories and disposable hosting, suggesting it functions as a link farm. The ClamAV detection as 'Pdf.Phishing.Trojan' indicates a malicious intent, likely to lure users to phishing sites or download further malware. No scripts were extracted, but the structure and URL patterns are consistent with phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3973

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://inwebjor.ru/uplcv?utm_term=great+gatsby+chapter+6 PDF link annotation
    • http://danielbushreunion.com/clients/41596/File/73912677274.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160799739ccd30---zetajusiporatami.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/3j10vpksp1k90vn0mbfvheet0k/riwazemulezewojodolaj.pdfIn PDF document text
    • https://childrencareandliteracysociety.org/userfiles/files/viloxovupud.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083db5ef2025---29993754103.pdfIn PDF document text
    • http://yearbookplus.com/uploads/ckfinder/files/87669811659.pdfIn PDF document text
    • https://ncvpte.in/userfiles/file/wisuki.pdfIn PDF document text
    • https://veglifekc.org/wp-content/plugins/super-forms/uploads/php/files//wofozikuxowez.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/968a0c608fab79c2fcadd3bad142f6e9/lufugodinutobisopux.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075659dd687b---95713177388.pdfIn PDF document text
    • http://www.singchai.co.th/ckfinder/userfiles/files/fitimige.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/45233975830.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/62290402564.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/af96d542b7e007f2632c60b26713433a/japekatevororusetigeles.pdfIn PDF document text
    • http://gidaero.com/upload/fckeditor/file/pilazag.pdfIn PDF document text
    • http://asu78.ru/userfiles/file/84569374470.pdfIn PDF document text
    • http://kelvista.lt/images/files/wozasavobesivuwavulesej.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/c3770c316f2470a9ea447216ecf5c78f/14274073821.pdfIn PDF document text
    • http://cuacuongiare.vn/upload/files/63684948862.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/jk6uq5t02hmcijf07url2i7pc5/sijemobinujopef.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5df8634f82---5469145452.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085029ce9315---54332224632.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/18513438638.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_off0000c95e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95E 10752 bytes
SHA-256: d60fb97edb0102c27583a7c5733e5fb131bc55256d4027de7039e388b9adf585
font_01_sfnt_off0000e21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fa2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA2E 16864 bytes
SHA-256: 86aa327f9212c7b43355dc4bb4bb02e4d2f03fc89a86d9de871b8224e85623f6