Malicious PDF — malware analysis report

Static analysis result for SHA-256 3152c8d6eaa4129c…

MALICIOUS

PDF

64.0 KB Created: 2021-09-29 01:11:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b455f33ecdfc20278846bedbbc858665 SHA-1: c63e2c7c830f6b7874fc1ec341798be4f2cfd99e SHA-256: 3152c8d6eaa4129cc74a53b14819452bea635efc32e7de4dd01fe749ad9dea56
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external websites, many of which are identified as hosting other PDF files. This behavior is characteristic of a link farm designed to distribute malicious content or facilitate phishing attacks. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6776

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://inwebjor.ru/uplcv?utm_term=note+9+vs+redmi+9t PDF link annotation
    • http://ideviceplus.be/app/webroot/files/userfiles/files/tasimobukaraxis.pdfIn PDF document text
    • https://marblobathware.ph/app/webroot/img/files/jivoxobila.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613cd73989401---fovugirulurum.pdfIn PDF document text
    • http://slovoveri.org/userfiles/50310469691.pdfIn PDF document text
    • http://xn----1-6cdapb2bdyqawnpcindqfc.xn--p1ai/media/file/20445375012.pdfIn PDF document text
    • http://opusincertum.it/userfiles/files/90005408379.pdfIn PDF document text
    • https://isagrinio.gr/userfiles/mavixipi.pdfIn PDF document text
    • https://m3nan973ru5-pa571.com/contents/files/45903144174.pdfIn PDF document text
    • http://partnercable.hu/files/68422018263.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613e67762dce5---40054182045.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/6639423427.pdfIn PDF document text
    • http://meghdoothsuzuki.com/uploads/lezosovoxafi.pdfIn PDF document text
    • https://truonggiangcompany.com/userfiles/file/rodojakarodunogivafi.pdfIn PDF document text
    • https://nepalmicrofinancesummit.org/userfiles/files/zimosabavizinarotemotitu.pdfIn PDF document text
    • http://aerotherminsulation.com/userfiles/file/58842783490.pdfIn PDF document text
    • https://firmabudowlanawalczak.pl/web/uploads/files/sepimanawatexunewexep.pdfIn PDF document text
    • http://reginahajo.hu/_user/file/zujorenedosakun.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/161438dde87937---kuvixe.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/rogetowejapaz.pdfIn PDF document text
    • http://veterinariacomportamentale.it/userfiles/files/jibofalunej.pdfIn PDF document text
    • https://dangeloremodeling.com/nbloom/fckuploads/file/pedefiwovituviwedabaj.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614dd710f39d6---63697728084.pdfIn PDF document text
    • https://servicio-mexico.com/images/file/30423205481.pdfIn PDF document text
    • http://essentielles-theater.de/UserFiles/File/getibafitekozareg.pdfIn PDF document text
    • https://novahealthclinic.ca/userfiles/file/43181640796.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_off0000b283.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB283 10308 bytes
SHA-256: 78a5e9f31271d797355407e7a5c88804716cee3c6394a711a3d68b7920f3c2ed
font_01_sfnt_off0000c9d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D1 18328 bytes
SHA-256: fae4bbc0d68ad71341805c47af9ac0de1b501b2c0f8c4ef3429b280aba89f7f7

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