Malicious PDF — malware analysis report

Static analysis result for SHA-256 083f2cafa5b9fcde…

MALICIOUS

PDF

73.5 KB Created: 2021-07-01 15:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 43fb1b35d154ba9784fca723c66535bc SHA-1: eb7750856cc9c0038dcdf9ad1c9d804b1f6f5b89 SHA-256: 083f2cafa5b9fcdeaebc47b783628a00be0eb0dade8dec1e9acb72211167248b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous compromised WordPress sites, a common tactic for phishing or distributing further malware. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The embedded URLs suggest an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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.
  • 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://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/p7u1696dgr2gb4atrvru55dr0u/negogosonadikanofafas.pdf
    • http://klubalfa.org/img/userfiles/file/5994137421.pdf
    • https://soportedevida.mx/ckfinder/userfiles/files/82814099237.pdf
    • https://menu2uplus.com/images/file/11569906791.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a242680fc---34192990665.pdf
    • https://tradingphrases.net/userfiles/files/60890672920.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812b5527202---garezamumisikuvosirezow.pdf
    • https://llsindia.in/FCKeditor/file/31661103361.pdf
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/f45ba7db99a3f964ab067b8b5ae4f13c/teripevesuguj.pdf
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/iiaejro6rub3khmvfsj299gt4h/tebotofunaxopudisivono.pdf
    • http://standartbio.com/fckfiles/file/fopaminimobavovexajop.pdf
    • http://paillasse.hu/userfiles/file/28083133715.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/8cb4rallinv7anb25u5ktcb4k5/42956534024.pdf
    • http://gsemilia.it/userfiles/files/wirenegejemeronewavexe.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/4c7hiti7bq5jaggst41hee7bn8/basaz.pdf
    • http://ahkjt.com/upfile/file/95070079707.pdf
    • https://f1com.ge/wp-content/plugins/super-forms/uploads/php/files/a9fab39f715e4771e411e4d0e66b76b9/96881496598.pdf
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160757170a6e83---669020196.pdf
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/8glp5iobnu4t0874kdia5i8g88/felotanujevutewubewonufo.pdf
    • http://seigyobannkaigaikikaku.com/ckfinder/userfiles/files/wuvokodikinosi.pdf
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a96a4802202---sikedunoj.pdf
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088b50abb3b9---44196502486.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=anjali+hd+images
    • 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_off0000bcd9.bin
3bb2b342096a62a4fdff3562379a93bb41aa6d5e25b905554ac8727b89016123
pdf-font-stream PDF embedded font (sfnt) at offset 0xBCD9 16612 bytes
font_01_sfnt_off0000e828.bin
c1261b4e4467d98c87c374b5d609f80caa1e42ce2e7d5ffb3b8267accdc946cc
pdf-font-stream PDF embedded font (sfnt) at offset 0xE828 10488 bytes
font_02_sfnt_off0000ff7d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7D 16792 bytes