Malicious PDF — malware analysis report

Static analysis result for SHA-256 281792286bf99ebd…

MALICIOUS

PDF

72.0 KB Created: 2021-09-07 20:24:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 337512cf5253dd1e5f43bd8ec3cb8281 SHA-1: 8e091bb55f41a7408e582309782d294edbc33926 SHA-256: 281792286bf99ebd43226d371f87845cf92dc4bcee7e3ca4bf80034a03d582f6
124 Risk Score

Malware Insights

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

The PDF file contains a link farm, with numerous URLs pointing to various domains, many of which are hosted on compromised CMS uploads or disposable hosting. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent, likely to lure users to phishing sites or for SEO spam. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4060

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://vyveva.eu/UserFiles/File/pomifodup.pdf In PDF document text
    • http://akkoryazilim.com/userfiles/file/dilujovodakerexos.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f291ca0816---dojijotosukiwegaj.pdfIn PDF document text
    • http://designpavelzapletal.cz/files/file/38723338741.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607e90b7a8e28---biluzegobevipafa.pdfIn PDF document text
    • http://creativeindustries.ru/uploads/userfiles/file/denoxagaretoveveribam.pdfIn PDF document text
    • https://portalbime.com/UploadedFiles/New/file/70655183818.pdfIn PDF document text
    • http://inspirationforexcellence.com/clients/66491/File/18936783671.pdfIn PDF document text
    • https://rlmahtani.com/userfiles/files/27337682074.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160943ffb55dd0---kekotasora.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c17e85c6d---xukozon.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac7ac49ec6---zituvibojulokoni.pdfIn PDF document text
    • http://55pluscommunityspecialist.com/userfiles/files/nogugonojagevevigabuj.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/9beafa7a9520a8c6b99264fbef986584/malukutopinuv.pdfIn PDF document text
    • http://flooroverstock.com/admin/userfiles/file/kubup.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/9674923419.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/e8d149555c0a8d6c52e99da4f65aa689/201877102.pdfIn PDF document text
    • http://monarchiaerembolt.hu/tmp/nufupe.pdfIn PDF document text
    • https://boldvision.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160a2aba328aa8---tosuj.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/ramasgc7lulaiaph5cdjk598n6/51473140371.pdfIn PDF document text
    • http://liburnia.pl/userfiles/file/seluzuravopojazasexo.pdfIn PDF document text
    • http://strahyi.ru/images/file/divaxufagokesakujul.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/folewokix.pdfIn PDF document text
    • http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/lmp1cf5r7u79c4hnfh28ec8as2/buvaserupeguvapitolagu.pdfIn PDF document text
    • http://archinfo.ru/uploads/file/wepinakamuxurazekimomuvod.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=practice+worksheet+graphing+quadratic+functions+in+standard+form+worksheet+answersPDF 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_off0000c757.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC757 11448 bytes
SHA-256: 6d2b125892311ba7a288767d020eac6dec0d939ee92f994ff3ea1af205326f08
font_01_sfnt_off0000e1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C8 17468 bytes
SHA-256: 6230b2fdf56a45b6c7a852e09d423ec664d5b2df64e8efd08ecd20da7119796c