Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0f2215ef48957ee…

MALICIOUS

PDF

96.2 KB Created: 2021-06-26 09:13:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: accac4b52a608b89f07962446cd26d75 SHA-1: 2ad8ec48e2c23b26fa1106ffbb28292338161de2 SHA-256: c0f2215ef48957eed9f5d264f721f70d65fae8d32715e4168d90e901c7f6311b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and numerous URLs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery via these links. The presence of JavaScript suggests an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ccfb65c1e8---xasax.pdf
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c05faae8568---74966943283.pdf
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/dedeff93cf79172486b555ea5af9f836/sifilazedobogirijup.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608770f503520---11304767954.pdf
    • http://modnyi-buket.ru/uploads/files/pedixoligifor.pdf
    • https://laser123.com/geektic/files/48049584794.pdf
    • http://mackyz7automotive.com/js/upload/files/81298406783.pdf
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/q1i0thm4m9su9bq4hqq0iuk32f/76345729019.pdf
    • http://altaprecision.com/userfiles/file/58327547518.pdf
    • https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/0d3bde185c0019db3983743b38a28abe/3960176159.pdf
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6fbf96250---67814531559.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/4538450da6876036bcc78361f55f6188/44854060213.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/66afe33e4a14b9509939d88f9e7ce27a/56410346642.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a814656a97f---6116909702.pdf
    • https://bczenekar.hu/files/file/tuxud.pdf
    • https://movesforfree.com/wp-content/plugins/super-forms/uploads/php/files/0atdc5lp0ubpinjt5h2prk7qi1/43980998918.pdf
    • http://highendschmiede.de/highendfiles/file/pipixujokeginotapojorak.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160a82a3c5fb62---mebogisisewaxetufarekeroz.pdf
    • http://abwessex.com/uploads/files/kurutipukudakowoso.pdf
    • http://ascensionchina.com/userfiles/file/73457091325.pdf
    • http://hataylezzeti.com/resimler/files/ronopenopigutixedoj.pdf
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16096d1374d511---fufegupolamuridadexutafi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=the+red+tent+online+free
    • 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_off00011bc4.bin
f0b12ef9235b10b04bed7d89aec9953d63d20e267a38752172844dd3cb97c6c2
pdf-font-stream PDF embedded font (sfnt) at offset 0x11BC4 10084 bytes
font_01_sfnt_off00013211.bin
e6116ea7c0631f29cbdcc353856db4d1d011ee8eb391cda14562450cdff82335
pdf-font-stream PDF embedded font (sfnt) at offset 0x13211 16244 bytes
font_02_sfnt_off00015bad.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x15BAD 16792 bytes