Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6c217ecc16fda75…

MALICIOUS

PDF

88.4 KB Created: 2021-07-18 23:00:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d681bb7bd15408bf0827ddd9902f2ac5 SHA-1: f21710267b29f24c31180f93c4ea0656e3de7f01 SHA-256: f6c217ecc16fda75357675d7f78cae46b25d4ef1edd8c876b5eceb4185c6b958
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites or disposable hosting. These links are likely intended to redirect users to download malicious payloads or engage in phishing activities, as indicated by the ClamAV detection and ML classifier. The embedded JavaScript is likely used to facilitate the redirection or download process.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • 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.
  • 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 http://deccanquest.com/konadnew/userfiles/file/63732174385.pdf
    • https://bustotoronto.com/userfiles/file/sesajesum.pdf
    • https://betalinktech.com/blmedia/file/77001915129.pdf
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c77f651cdcd---samopekobuvupesesidafe.pdf
    • http://xn--9w3b11kh5l.com/ckupload/files/94590771177.pdf
    • https://shayangroup.net/wp-content/plugins/super-forms/uploads/php/files/d44fa3b79865d400b632dce6fa1fe8cf/gejifusafagunisobovikewa.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609837fda4809---7414800027.pdf
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c2160515f---gekanez.pdf
    • http://connect-senior.ch/uploades/userfiles/file/jamaberosere.pdf
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608b40ddd30be---wasodutodanesobofonuzu.pdf
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607951b749521---40726374981.pdf
    • http://uniradioweb.info/userfiles/files/dotopekabavuwuresebaxiw.pdf
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a595fd29a09---35863511165.pdf
    • http://phutungquanghieu.com/app/webroot/files/ckfinder/files/zosebomukevujisagigiwu.pdf
    • http://bakkervoorwinde.nl/app/webroot/files/ckeditor_files/files/81902175169.pdf
    • https://gyandeepjkss.org/userfiles/file/64102002731.pdf
    • http://kalmi.ru/upfiles/files/kupar.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba19f22d566---44326228501.pdf
    • http://biirbeh.mn/images/content/file/17647033096.pdf
    • https://communeouchamps.fr/userfiles/file/72403534352.pdf
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/48043120966.pdf
    • https://alllegaltask.com/wp-content/plugins/super-forms/uploads/php/files/m0k1m2ir9voa3ucs0msq2kfkvt/25780092749.pdf
    • https://snpwachq.com/files/js/ckfinder/userfiles/files/31809586474.pdf
    • http://adoriantarla.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16076ab77be21d---saguguk.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609199954d29e---wavotupupepupanasoludaxez.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=free+download+nitro+pro+8+full+version+with+crack
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e354.bin
0d820950f685b581c40819daa4b904698f2c7e9faccd65df1da7d122d49de474
pdf-font-stream PDF embedded font (sfnt) at offset 0xE354 11248 bytes
font_01_sfnt_off0000fdba.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBA 16792 bytes
font_02_sfnt_off000115cc.bin
d0d8833cb6c2f806329e2eedaf76583b54c0ae5d7f66dcc61267cb39e57a845c
pdf-font-stream PDF embedded font (sfnt) at offset 0x115CC 29912 bytes