Malicious PDF — malware analysis report

Static analysis result for SHA-256 22926280256427e4…

MALICIOUS

PDF

62.4 KB Created: 2021-09-04 23:12:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9095cb1c5c75f369e30989b003af2ab3 SHA-1: 0354ef557f397d21f55172f345cd715fe70008f6 SHA-256: 22926280256427e4da9b305d40ff2ab2729f9fa8ba8a35eacd6f9a6008fbe7e5
154 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised or disposable domains, likely intended to lure users into clicking malicious links. The presence of multiple links on potentially compromised WordPress uploads and disposable hosting further supports its malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6567

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://starkhigh1972.com/clients/d/dd/dd83d6d7846a033806cdb512e10d7d7c/File/sevekiferafe.pdf In PDF document text
    • http://antichigelsi.it/userfiles/files/fometuwesipivabogipipan.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2bb1eeec1b---xixuguranadedurilev.pdfIn PDF document text
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/h01vf8gt8qv9aa4u9ekj9frrg6/fadivupisepuvakixunu.pdfIn PDF document text
    • http://sobinco.cz/ckfinder/userfiles/files/66208488269.pdfIn PDF document text
    • http://pathtojanna.com/userfiles/files/45103364267.pdfIn PDF document text
    • https://primer-spb.ru/files/files/51026747647.pdfIn PDF document text
    • https://coolingrealestate.com/your-home-cleaner/FCKuploads/file/10998018986.pdfIn PDF document text
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160760bc6b1285---48959191908.pdfIn PDF document text
    • http://fabrykakonwersji.pl/wp-content/plugins/super-forms/uploads/php/files/b48246a81e9233444220897d5f9b7936/negakukusi.pdfIn PDF document text
    • http://emekyesiltepe.net/images_upload/files/39707971205.pdfIn PDF document text
    • http://stallingreunion.com/clients/a/a3/a37dbb3dca22f8cb40f44de83fe48269/File/fodevefozowe.pdfIn PDF document text
    • http://civicwomen.com/ckfiles/files/negutozugawetepinajas.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/99078ea7d24cb0feccade370c4188189/61102197524.pdfIn PDF document text
    • http://beloit1962.com/clients/8/83/8368a4f838dea3176655029ae9e337da/File/92719767434.pdfIn PDF document text
    • http://abwmechanicsville.com/uploads/files/furodozefedumib.pdfIn PDF document text
    • https://imaggu.com/ci/userfiles/files/lutobokujoped.pdfIn PDF document text
    • http://ranaghatpchsschool.org/userfiles/file/wogiraxatolo.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/gojukuguletonobuxise.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/dc1bf0ee493559160ea0d12b3b89c288/mijav.pdfIn PDF document text
    • https://areopag.ru/sites/default/files/uploads/92414942903.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160bd5bead517e---31690647555.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/6aeb5d207fb3defae9389d06b849d1ee/74981604754.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=fabozzi+fixed+income+8th+edition+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_off0000b56d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB56D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD7F 15436 bytes
SHA-256: 5964af23059c072ae045bb156bcbf5a020aa08a923b96405bef41d08870a4059