Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c74ffb3d1227b08…

MALICIOUS

PDF

79.7 KB Created: 2021-09-21 02:17:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 580c6ff7763e6e2a474fd2b6626106fc SHA-1: f3a14404fb19975d58ec8bdc81d432908ffc41b5 SHA-256: 0c74ffb3d1227b081de82b8891e1a8f9aa7a125c5ec7533dff62b3182e3fede7
154 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated maliciousness. Heuristics identified it as a link farm containing numerous URLs pointing to potentially compromised or disposable hosting. The document body was unreadable, but the presence of many external links suggests an attempt to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7219

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://infrive.ru/uplcv?utm_term=iris+go+apk PDF link annotation
    • http://malir-naterac.info/UserFiles/File/nudexopeguwenazisaf.pdfIn PDF document text
    • https://biogenetixpharma.com/ci/userfiles/files/4959404525.pdfIn PDF document text
    • https://cafesca.mx/ckfinder/userfiles/files/169160280.pdfIn PDF document text
    • http://www.introspekta.si/ckfinder/ckeditor_uploaded_files/files/biwogatijuper.pdfIn PDF document text
    • https://lapakunited.com/contents/files/pokofosuxovoguda.pdfIn PDF document text
    • http://gardensyellowcab.com/admin/images/file/mafikepit.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16130fb627e750---81533330182.pdfIn PDF document text
    • http://yer-krasnodar.ru/ckfinder/userfiles/files/48671940100.pdfIn PDF document text
    • http://punaide.com/userfiles/files/viwebatuxinexewimasixip.pdfIn PDF document text
    • http://naphotelbangkok.com/userfiles/files/16195635297.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142c82e65b84---tuvezewubix.pdfIn PDF document text
    • http://186086.com/upload/files/10402490115.pdfIn PDF document text
    • http://mebel-moscow.com/content/xuploadimages/file/27245615314.pdfIn PDF document text
    • https://www.weldcor.ca/public/ckfinder/userfiles/files/lewidewuleduweka.pdfIn PDF document text
    • http://gloteckr.com/upload/editor/file/46629968420.pdfIn PDF document text
    • http://rajskiewakacje.pl/userfiles/file/68360403518.pdfIn PDF document text
    • http://e2ingenieros.com/ckfinder/userfiles/files/46696244653.pdfIn PDF document text
    • http://dansungsala.com/uploads/files/befuzovekoberalob.pdfIn PDF document text
    • https://carcable-bg.com/uploads/pictures/files/vefidefomefubinefu.pdfIn PDF document text
    • http://kaushalacademy.org/ckfinder/userfiles/files/jesevunusovaxifif.pdfIn PDF document text
    • http://travelspace.pl/userfiles/file/surekesutavasefejezi.pdfIn PDF document text
    • http://birdwatching.sk/media/file/31465419594.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140107b8e0cf---nunibapimexi.pdfIn PDF document text
    • http://jaatkinson.com/userimages/kevazosomolajadejiga.pdfIn PDF document text
    • https://workinhotel.com/upload/fckfile/xowemotogusodanusar.pdfIn PDF document text
    • 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_off0001009e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1009E 10088 bytes
SHA-256: 2ba4bbadf298a5819840eb8ad7ce210f3e954d379fb6b01146cfe0d84be23332
font_01_sfnt_off0001172d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1172D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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