Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5fed5bb056d31d7…

MALICIOUS

PDF

69.2 KB Created: 2021-09-06 06:52:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 791c986300c877817885bf3911337397 SHA-1: 4485493e46baeb16dd2e484cb16646ba4158f0ba SHA-256: b5fed5bb056d31d77b81059f35d7074736bd22f41c3c042e6d21ef4ce92db214
154 Risk Score

Malware Insights

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

The PDF file contains a link farm, directing users to multiple external URLs, some of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9108

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://kolbandibileklik.com/resimler/files/finifogi.pdf In PDF document text
    • https://zionapostolicministries.org/uploads/file/kexabisonosalupi.pdfIn PDF document text
    • https://stallion-international.com/userfiles/file/54886631226.pdfIn PDF document text
    • https://defi128.com/userfiles/files/rovelis.pdfIn PDF document text
    • https://congtydaihai.com/upload/files/dejojajejuvaniwur.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/39e1b790be1360c49a91c00e99e8c8c4/65534680884.pdfIn PDF document text
    • http://tanphatinst.com/vietkiendo/upload/file/fogurasivexuwijakofozi.pdfIn PDF document text
    • https://cremeconferences.com/wp-content/plugins/super-forms/uploads/php/files/81bbfdddc9aae235d31a5c777736210a/78562611903.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/80651975657.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a74f56de25d---71347130066.pdfIn PDF document text
    • https://gagiongvitgiong.com/ckfinder/userfiles/files/58116090529.pdfIn PDF document text
    • http://festivaldeliteraturadepereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ada873f36d---pifemoboturemusewotekuvak.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608c626401be9---luretosuwepejanum.pdfIn PDF document text
    • http://nyett.hk/uploads/news/files/xugek.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/96946940723.pdfIn PDF document text
    • http://hpworld.hu/data/pic/Image/file/dunoxuvazal.pdfIn PDF document text
    • http://www.zywawiara.pl/pliki/sabexitozaru.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a2eb31ec91---44926287608.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/ebcf9a1a4057de5aae37d75030a15a3b/rubumagepudoxurol.pdfIn PDF document text
    • http://pelesiuvalymas.lt/i/File/74879243072.pdfIn PDF document text
    • http://xn--72c7caerxx0d3a9eve.com/UserFiles/File/5012388595.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/gc4pnvi18sj1q4lmi3aplt1sbm/zufogetuvenuwinozeru.pdfIn PDF document text
    • http://beiwendq.com//data/attachment/file/nokupekijubokalamatug.pdfIn PDF document text
    • https://adreshosting.com/calisma2/files/uploads/59944549871.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=choose+your+own+adventure+pdf+collectionPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE550 17880 bytes
SHA-256: eab7cf74fa9029ec7862e2f63b461564b95ffd86a6adf5e9d14f62749b61c1f8

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