Malicious PDF — malware analysis report

Static analysis result for SHA-256 46debe61f0393dba…

MALICIOUS

PDF

84.7 KB Created: 2021-10-07 14:57:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8fad717113f2822c6fdbc0d29cb293e4 SHA-1: 24437fe6482d9f01fbb79b99cd3a32b8ff3aea16 SHA-256: 46debe61f0393dba7c7d4ab6f343507f6241cb70e83b0f7f6672ef4c6b4920b5
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, a common technique for executing malicious code within documents. The ML classifier and ClamAV detection strongly indicate malicious intent. The embedded JavaScript likely facilitates the redirection to external URLs, as evidenced by the numerous external URIs found, which are often used in phishing campaigns or to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://smidgel.ru/uplcv?utm_term=the+mosel+valley+germany+map PDF link annotation
    • http://www.parinet.fi/tiedostot/files/51912119588.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/gijelomebabox.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/94386718467.pdfIn PDF document text
    • https://ottopianos.nl/files/xarojofejijitubolamowibek.pdfIn PDF document text
    • https://maxlinder.com/admin/assets/ckfinder/userfiles/files/wadimejefififozemexe.pdfIn PDF document text
    • http://productinfo.in/konadnew/userfiles/file/bizefovosipotuninedegefo.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/8hocus2iihvjj1c7925dqe6jkd/xirizeragu.pdfIn PDF document text
    • http://dangkykinhdoanhkiengiang.com/upload/ck/files/nosuxolajemaxakategorij.pdfIn PDF document text
    • http://speed-r.com/js/upload/files/budefabeludadepumekaxuwu.pdfIn PDF document text
    • http://locnuocvietmy.com/Images_upload/files/33579938758.pdfIn PDF document text
    • http://bjxbw.cn/userfiles/file/68564525213.pdfIn PDF document text
    • https://newchat.xyz/js/ckfinder/userfiles/files/74293447636.pdfIn PDF document text
    • http://kelvista.lt/images/files/webapiwugenevibubovoxopi.pdfIn PDF document text
    • https://memorybg.net/app/templates/js/ckfinder/userfiles/files/kawejurilapujatewazeri.pdfIn PDF document text
    • https://smobiil.eu/userfiles/files/88757305029.pdfIn PDF document text
    • http://www.amedna.com/userfiles/files/27072461718.pdfIn PDF document text
    • http://www.tractortools.cz/ckfinder/userfiles/files/kilufigobujapegigirotul.pdfIn PDF document text
    • http://upoart.com/ckfinder/userfiles/files/wipibe.pdfIn PDF document text
    • http://www.galiantsolutions.com/emailimages/file/89654705865.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/wupugifofowikomiwuvik.pdfIn PDF document text
    • https://bursakaynak.net/userfiles/file/fuweruzojegagadinotomagi.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615aea2b3cc88---gigasezulenufoxawiwuma.pdfIn PDF document text
    • http://cokhixnktientien.com/Images_upload/files/wivedaluredejibumis.pdfIn PDF document text
    • https://pezenasenchantee.fr/userfiles/file/newozite.pdfIn PDF document text
    • https://regenerateacademy.com/file/15927269430.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In 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_off0000de80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE80 21276 bytes
SHA-256: c2a1f6fe99f4a8c0d668a143b051a8f4c0f5eff94f13b066e12c143bee968ed5
font_01_sfnt_off00011670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11670 10652 bytes
SHA-256: 9df8377776e572e600c4fcfc9aa41b7d81f858715b261983cd03bbf5c67c6943
font_02_sfnt_off00012ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1