Malicious PDF — malware analysis report

Static analysis result for SHA-256 079e7049fd4923f1…

MALICIOUS

PDF

86.2 KB Created: 2021-09-04 19:07:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-02
MD5: 16620c2edbe11932aa3d462b8ae08e22 SHA-1: 58de217e7b21ea757683d6db094051871aa824cf SHA-256: 079e7049fd4923f10c3de074ef7e9cc62fd25dc6bd24ca71b01caa48abfa2206
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. 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 clean score 0.1831

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 https://medvor.ru/uplcv?utm_term=adding+and+subtracting+fractions+worksheets+5th+grade+pdf PDF link annotation
    • http://www.patriarca-batiment.com/ressource/site-image/files/kozufemuwixarow.pdfIn PDF document text
    • http://lynxitservices.com/ckfinder/userfiles/files/11696655807.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/41680698377.pdfIn PDF document text
    • http://praxis-greve-polley.de/web/editor/files/zazudakilaxagukil.pdfIn PDF document text
    • http://heureka-cz.eu/files/lizidabalarutetitupa.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/9n65uj4cvgbvispa1s9ub7pf57/58567696052.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b24d1590c76---59709837770.pdfIn PDF document text
    • http://norilskgu.ru/userfiles/file/moraz.pdfIn PDF document text
    • http://teaandtiarasottawa.org/clients/e/e8/e8f54e69a7463df9fd0adff13cd8e90f/File/xafukavunibuferobibene.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/6qh8hfqhfsggcli8p51rj9mnrg/sapanabexeronipi.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ce31f826686---68888361979.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/160e67ab3a98a6---nilipokas.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160de3851a9dce---89657562566.pdfIn PDF document text
    • http://euroteam.vn/ckfinder/userfiles/files/wawadafovuxoxoge.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f4b1da98a3---17064351102.pdfIn PDF document text
    • http://kwiatmetal.pl/userfiles/file/mutimipa.pdfIn PDF document text
    • http://harryreichert.de/uploaded_pics/News/file/lomapaw.pdfIn PDF document text
    • http://shanghaiqingchen.com/upload/files/77705955418.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/fd754c917152ca451c563bcd88d5bf68/vutope.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3c43d7c7c---vilosejexo.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/b4b2vp7abe0lj9bt4p1ju9dna4/61420011615.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16105db4a27d9f---pudevo.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/80520139723.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba8856cce20---delakilanenerajan.pdfIn PDF document text
    • https://hiampelectric.com/wp-content/plugins/super-forms/uploads/php/files/a799285dc03fbe5713cc755c65b44a29/bijelotituvokeriwok.pdfIn PDF document text
    • http://modero.vn/upload/files/vaduwujunuxamizekurilowa.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_off000112a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112A7 17832 bytes
SHA-256: 240989935ade2ccf1e686cef93257a0fb0b31def788e288d95f57cf97be2aec5
font_01_sfnt_off00014049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14049 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1