Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7178ff2c15de5ca…

MALICIOUS

PDF

77.5 KB Created: 2021-08-31 22:47:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 07b233ea92c21e5f7f71ce1393d34803 SHA-1: d87617f61419fc567a36a9e18235e44a7ee787a5 SHA-256: c7178ff2c15de5cad37ac07fbe97eb34697e5c24bbe4da0b1dc32b10a6d0fe16
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7352

Heuristics 4

  • 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://crysiq.ru/uplcv?utm_term=driver+booster+full+version+free PDF link annotation
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/16094c651d5bf9---78787315517.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103cfbe1bcfc---supak.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a31a5d02ea6---vamosixusu.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/r8pppcrn1350aqthbthvpbct60/85252381172.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b66d92daaad---zamugegimudo.pdfIn PDF document text
    • http://mudrberanova.cz/userfiles/file/27118150353.pdfIn PDF document text
    • http://afro-safari.com/upload/files/47840604898.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/cc23r7a67mqsdmr50492r51c5c/82258383589.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d01343f0fc7---wugizo.pdfIn PDF document text
    • https://ltgtrends.com/wp-content/plugins/super-forms/uploads/php/files/04de8361ecedddd33170d2963972ffef/wekezi.pdfIn PDF document text
    • https://feriaesotericadeatocha.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d61fae693---siwedulufatubasikilugi.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1612bb8ca9e81b---62657589202.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/c2bshs0q0v1aldj59i94qg7vq1/53434097216.pdfIn PDF document text
    • https://virtrade.gr/userfiles_lybo/file/desijigojobowasubodevama.pdfIn PDF document text
    • http://champaigncursillo.com/userfiles/file/polofovale.pdfIn PDF document text
    • http://www.ferm-matic.fr/upload/file/kagaso.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dde012d90ab---62177122493.pdfIn PDF document text
    • http://huucodatlanh.com/userfiles/file/12450433345.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/00d68a0331e149d3c6030cc7903706aa/41023874350.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/sapiforofavafil.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/7j4i2jmhogo4f5s7fcn4i49b05/91307887475.pdfIn PDF document text
    • http://chinasoftcore.com/userfiles/file///lotozox.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_off0000e4a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A3 10352 bytes
SHA-256: a2b7969ea385df239489202b46ea463f822097f4f04caf5ae9c5c4f3363ff165
font_01_sfnt_off0000fc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC2C 18308 bytes
SHA-256: 1e6449563c876209e1817cfb94ee21c2bd2abfed6f87a5eb57119c09076c9ef5

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