Malicious PDF — malware analysis report

Static analysis result for SHA-256 4cd2fb0f7dd1ddcd…

MALICIOUS

PDF

62.3 KB Created: 2021-09-23 04:52:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: cb2937f66aff17d72f9ac9cb63ba485f SHA-1: ac442f08ce38a344011bbb81caf128c108094f89 SHA-256: 4cd2fb0f7dd1ddcd2ea2a50f7861ee64452a2a1bd00b67488a136943f49136ad
124 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm on disposable hosting, suggesting a phishing or malware distribution lure. The embedded URLs point to various PDF files hosted on different domains, likely serving as redirects to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6537

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://cabanagarden.hu/editor_up/61116119528.pdf In PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b705d536f3---82871465413.pdfIn PDF document text
    • http://antonellascarpittadesigner.it/userfiles/files/bofaguba.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/memevirakaxobugem.pdfIn PDF document text
    • https://nls.vn/upload/files/67093465652.pdfIn PDF document text
    • http://studioagronomoserragiotto.eu/userfiles/files/xadekimenulatomiwamuteke.pdfIn PDF document text
    • http://handlpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/11291319668.pdfIn PDF document text
    • http://transporteslaplata.com/imagenes_web/file/gomivopitokik.pdfIn PDF document text
    • https://xylemleads.com/userfiles/file/69141309628.pdfIn PDF document text
    • https://holcom-wd.holcom.vn/webroot/img/files/rijunuxetopep.pdfIn PDF document text
    • https://www.sonorisation-auxerre.fr/ckfinder/userfiles/files/70142634469.pdfIn PDF document text
    • http://www.gobarging.com/uploads/textareas/file/3246764193.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/36257797622.pdfIn PDF document text
    • http://yh-nutri.com/filespath/files/20210908061206.pdfIn PDF document text
    • https://anpheatingandac.com/nbloom/fckuploads/file/24648268687.pdfIn PDF document text
    • https://kokomanis.com/contents/files/78770638306.pdfIn PDF document text
    • https://yaslibakicisi.net/userfiles/file/9162956188.pdfIn PDF document text
    • https://needletherapy.eu/upload/file/pegovujirisavaxakulomogu.pdfIn PDF document text
    • http://thenext.pk/userfiles/files/36745307836.pdfIn PDF document text
    • http://fszhenjia.com/upfolder/e/files/20210910125747.pdfIn PDF document text
    • http://twfindia.in/userfiles/files/wiwopegibiraxisaluruge.pdfIn PDF document text
    • http://emanuelmlevin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kifofit.pdfIn PDF document text
    • https://vinaconexmec.vn/uploads/news_file/xudujaxiluxowira.pdfIn PDF document text
    • http://ativn.com/upload/file/6348517140.pdfIn PDF document text
    • http://henca.com/files/details/file/61024971121.pdfIn PDF document text
    • http://doctour.hu/uploads/ckfinder/userfiles/files/72587464470.pdfIn PDF document text
    • https://igruppe.no/ckfinder/userfiles/files/bibupi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=p+five+letter+wordsPDF 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_off0000c8c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8C3 17812 bytes
SHA-256: efd1f48476df5cd29b910c8706f97603ba9f2e89363e6cf839f5b526e880e82b