Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad498734774a756a…

MALICIOUS

PDF

84.5 KB Created: 2021-09-02 05:10:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 6a72d5d32c5d43d35da6fbecf990c406 SHA-1: 4cd2438ab3bfd60ae69d5066b5a0cce3ff7e3c18 SHA-256: ad498734774a756a0ac315293f46ef406b5db2095c649adb26f7553c534ba2bc
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to external websites. Several of these URLs are hosted on compromised WordPress upload directories, suggesting an attempt to distribute malicious content or phish users. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://theettiaresottawa.com/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/17314484601.pdf In PDF document text
    • http://alphasigmaoverseas.com/userfiles/file/37169485769.pdfIn PDF document text
    • http://bridgeonlaw.com/filespath/files/20210825063301.pdfIn PDF document text
    • http://zaiger.ru/img/file/76926626840.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/wusudoj.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e45f1d0dd84---wesolekowojifipewelegan.pdfIn PDF document text
    • http://sarlampa.ru/upload_picture/73741113712.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/zimixakimitabavifavigibok.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609be35d048ec---davovagezonawawix.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161078f9bd756c---jakajozonezimimagopukimev.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/tanujavezejodiregen.pdfIn PDF document text
    • http://clinicaveterinariamontecchia.com/userfiles/files/sinenirumeja.pdfIn PDF document text
    • http://chizclean.ru/files/fck/file/kebavafoditavotebinatufon.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/cdne7r2tb8sj2veoslp68974iv/rijujetulorisejabirosul.pdfIn PDF document text
    • http://okna-dvere-online.cz/media/upload/upload/file/vagafugowolutowobeno.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606d12cb6c664---40975597783.pdfIn PDF document text
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945742d9880---bimatarabaxoju.pdfIn PDF document text
    • https://flcevent.fcu.edu.tw/plugin/ce1/ckfinder/userfiles/files/20210728020721.pdfIn PDF document text
    • http://vietsonplastic.com/uploads/userfiles/file/kitaxifosexe.pdfIn PDF document text
    • http://offerseir.com/basefile/offerseircom/files/fakilutomazadeb.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9ba993954---15734347729.pdfIn PDF document text
    • http://0851gay.org/userfiles/202108file/2021081106131070554.pdfIn PDF document text
    • https://perfecthospitals.com/FCKeditor/file/19803721376.pdfIn PDF document text
    • http://unipsyclinic.com/userfiles/file/20210615005707.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=how+to+unlock+other+characters+in+super+mario+partyPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000e30e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE30E 17372 bytes
SHA-256: 13e65db64794fccf22719373eb0f2008078a132127ea8c23c709f5120a33dabc
font_01_sfnt_off00011031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11031 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012848.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12848 11024 bytes
SHA-256: 56d47bb252af1ac78d2d34d4caa0f161eda35e426b3111514b0fa19c546cab98

Open this report in the interactive analyzer, or submit your own file for analysis.