Malicious PDF — malware analysis report

Static analysis result for SHA-256 78d3e7c402d4a055…

MALICIOUS

PDF

65.4 KB Created: 2021-09-26 19:05:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 999196ea8e8d32baa10c30289c7a5ad1 SHA-1: c3359e5c9224e8643a5b111a09fad585e03b9e6c SHA-256: 78d3e7c402d4a055105308b0f6aa5accf1054e9551cf10d33bdce32d11997ad2
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. It also features a link farm pointing to multiple distinct hosts, several of which appear to be compromised WordPress sites. The ClamAV detection and ML classifier further indicate malicious intent, likely for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6133

Heuristics 6

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://pistant.ru/uplcv?utm_term=anbox+ubuntu+touch PDF link annotation
    • http://daglichtfilters.nl/ckfinder/userfiles/files/97378293113.pdfIn PDF document text
    • http://theseadiaries.com/ckfinder/userfiles/files/jujuwesumiwaribizarijibab.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/vupinoditi.pdfIn PDF document text
    • http://ecohort.com/userfiles/files/xebevobopubufamawan.pdfIn PDF document text
    • https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613298be47415---94965726451.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1614e94c5277fc---pevuvagirod.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614de81a53e94.pdfIn PDF document text
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614ec2af26b13---dijetarelujudinadoluwezej.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613d19fec47ef---zugof.pdfIn PDF document text
    • http://cardealer-space.com/js/upload/files/95320545977.pdfIn PDF document text
    • https://areshin.ru/wp-content/plugins/super-forms/uploads/php/files/a09434f0b04f8374399b14ecef17cc34/gixifemadefi.pdfIn PDF document text
    • http://venusland.vn/app/webroot/img/files/36504013223.pdfIn PDF document text
    • http://tubemakingmachine.com/uploadfile/files/66448912070.pdfIn PDF document text
    • http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5466c4357---pojugebavoto.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/39007909059.pdfIn PDF document text
    • https://al-farh-iq.com/upload/userfiles/file/raxigixurozisolowezizu.pdfIn PDF document text
    • http://swvocal.com/data/se2/file/20521192540.pdfIn PDF document text
    • http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/89329746459.pdfIn PDF document text
    • http://timebymtm.com/upload/files/62211733937.pdfIn PDF document text
    • http://kkagro.com/media/images/upload/file/48106987274.pdfIn PDF document text
    • http://miraesusan.com/ckupload/files/28583246087.pdfIn PDF document text
    • http://library.nesdb.go.th/ic/admin/ckfinder/userfiles/files/susoworaragelunilabetud.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b192.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB192 9948 bytes
SHA-256: b5420d54d913087c7f061aef58bd1be2970290d59048b1b1577639be1efd4ccb
font_01_sfnt_off0000c792.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC792 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000dfa4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA4 16264 bytes
SHA-256: 848c07363fbc7b8ef8eb54b326816dac099267c060769d39b508afc9e2d0c301

Open this report in the interactive analyzer, or submit your own file for analysis.