Malicious PDF — malware analysis report

Static analysis result for SHA-256 d76e28e15dac76f1…

MALICIOUS

PDF

87.7 KB Created: 2021-09-03 18:38:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 0db44f09f86d13a63faa1e7ebe537d9b SHA-1: 8266b05285bfc62d0045c9a70ab31c80939efba1 SHA-256: d76e28e15dac76f1686c61cd8581e2b2150ce6cf38ef3d24be894508f050cbd3
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3165

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 https://gadd-asso.org/userfiles/file/repopifanufadozisutub.pdf In PDF document text
    • http://hagelkonzept.de/userfiles/file/96990881212.pdfIn PDF document text
    • https://uslugiinzynierskie.com/eurostyl/photos/file/bugab.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5bc99e924---tegemilarebosazefomakaxog.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/94161794978.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a096dd0ecb5---tudupoponud.pdfIn PDF document text
    • http://jatechkj.pl/upload/fck/file/zujofixusi.pdfIn PDF document text
    • http://veterinariacasettamattei.it/userfiles/files/dewudutoger.pdfIn PDF document text
    • http://solyaris.pro/admin/ckfinder/userfiles/files/51403977249.pdfIn PDF document text
    • http://talk200.com/admin/admin/uploadfiles/file/zanof.pdfIn PDF document text
    • http://dialog-seversk.ru/jsplugins/ckfinder/userfiles/files/15065196220.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088aa07c4350---mukapalubikevesafasekis.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c3a37debce0---77435013193.pdfIn PDF document text
    • http://teormech.ru/teormech/usrimg/file/61281244206.pdfIn PDF document text
    • https://everestart.com/images/stories/file/pugurupibugufos.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083970eec9ce---87897288114.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da8a0cb6acb---88706950660.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/16094b7c831d63---befajilomajifabijosu.pdfIn PDF document text
    • http://chiaranannini.com/userfiles/files/1519608008.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16098348775625---nobegizebuzamik.pdfIn PDF document text
    • http://www.trafikyaren.com/wp-content/plugins/super-forms/uploads/php/files/1o1tsaon360kn7upfqc32s1l92/gurefidevorepagukogafuta.pdfIn PDF document text
    • http://faradbox.pl/files/file/mubemokuna.pdfIn PDF document text
    • https://nhahangbienhaitien.com/uploads/files/misupedolukubelejewepexox.pdfIn PDF document text
    • http://hcvitamin.com/webroot/img/files/felowedafupumukasa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=pop+music+chord+progressions+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_off000108e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108E2 10860 bytes
SHA-256: bce2f5f4f961ac2fc43ef9bc53857d81e7c2885c90041be121a0f3a47247188c
font_01_sfnt_off00012185.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12185 20236 bytes
SHA-256: 7d198292e026d582e8bcb05aba7f8e993dc2d5dc4bad53feab6ea562f6403a7a

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