Malicious PDF — malware analysis report

Static analysis result for SHA-256 62c0de3dafb2fd2a…

MALICIOUS

PDF

81.0 KB Created: 2021-09-21 19:42:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 219d854b2d11387b38d1aa46065c663c SHA-1: 0ae6f988cee86903c5d5fa90c3563098c94feb74 SHA-256: 62c0de3dafb2fd2a81dc72a1fc1c77310651505b61ad8a8b10353d4ef7ecde85
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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
  • 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://solentpodiatry.com/jackvl940/web/content/images_uploaded/file/wubekol.pdf
    • http://physio-praxismitte.de/userfiles/bogatuwixuzaz.pdf
    • http://maduraicaterers.com/app/webroot/js/ckfinder/userfiles/files/xabavoli.pdf
    • http://santamariamikado.com/uploads/files/78546532852.pdf
    • http://synowka.pl/galeria/file/65694692305.pdf
    • https://www.highettmetal.com.au/application/third_party/ckfinder/userfiles/files/64731712746.pdf
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/3d7c7f2b9f894f74cb82a862c8510804/xirizijezo.pdf
    • https://mchs.kz/userfiles/File/denenoketobifazamupal.pdf
    • http://okuninka-biale.pl/userfiles/file/24604309902.pdf
    • https://alubiasdetolosa.com/files/galeria/files/vufisuvutunapij.pdf
    • http://zenobiacultura.it/userfiles/file///34062553441.pdf
    • https://xn--80aaijz0c.xn--p1ai/ckfinder/userfiles/files/93447531352.pdf
    • http://galerie45.com/userfiles/file/60408939592.pdf
    • http://brenna-ski.pl/userfiles/file/bedomeg.pdf
    • https://divanich96.ru/admin/ckfinder/userfiles/files/95990547692.pdf
    • https://n-v-v.dk/userfiles/file/lefilisu.pdf
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/192f374a1efdcef8bc730077d924130d/jagofiwafinopuwagax.pdf
    • https://quangcaomattroi.com/uploads/news_file/26127997298.pdf
    • http://yuha.be/_files/file/rugafepijodaliwuliw.pdf
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133960af2acf---popakoz.pdf
    • https://rlmahtani.com/userfiles/files/22013962208.pdf
    • http://wittymall.com/multimedia/userfiles/file/62812888132.pdf
    • http://abw10thstreetne.com/uploads/files/dizamesexanijobogu.pdf
    • http://italianopizzeria-pg.com/uploads/files/jidodoretedo.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613f7c802ee75---nimebewodagevosadozebe.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=excel+vba+save+as+pdf+filename+from+cell
    • 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_off0000d6cf.bin
374615dd511af4a6e8d6542d5d389703d5bb00588321e731afb5b719d3a64ca0
pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CF 17472 bytes
font_01_sfnt_off0001045f.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1045F 16792 bytes
font_02_sfnt_off00011c76.bin
2e147a43ae5fb0ebfa02a07543934d3b9bed44e77831d52283c723a84772eaa2
pdf-font-stream PDF embedded font (sfnt) at offset 0x11C76 10972 bytes