Malicious PDF — malware analysis report

Static analysis result for SHA-256 e23e01608eb25f67…

MALICIOUS

PDF

122.9 KB Created: 2021-06-27 03:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ddd3cd5d348339f497ee836a58f3877e SHA-1: dad3a9214b76208ff92e35eeaa39c574a7fcb89c SHA-256: e23e01608eb25f67e3c51e63c71822e6b10441c8149d0ccb47c25fc2cc378218
156 Risk Score

Malware Insights

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

The PDF document contains numerous links, many of which point to websites hosted on compromised CMS platforms or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns suggest a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9809

Heuristics 6

  • 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.
  • 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://mya1fc.com/files/ckuploads/files/laxorek.pdf
    • https://aslimitada.com/userfiles/file/nazetopubomonomip.pdf
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160781da313900---suwojamorusin.pdf
    • http://attlas.center/userfiles/file/62709667555.pdf
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/160925221a7aa0---mebufokode.pdf
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b78933dc817---79506889749.pdf
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/b0dab443fa03d71a999aac76f5eef0a3/8798312488.pdf
    • https://edarky.net/data/file/zasaviriluzazer.pdf
    • http://cathugo.de/res/wysiwyg/file/wixujiwugapani.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/133012f7d10e1c01c32995287711be07/pojiri.pdf
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160c5c13b3a2ce---tirarojotunujaxesareda.pdf
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097f33aba465---valupebulebilomo.pdf
    • https://businesslife.com/content/file/busodiki.pdf
    • http://myexamadvisor.com/fck_uploads/files/68871002883.pdf
    • http://xboxheerlen.nl/userfiles/file/tezazatazitaliwotu.pdf
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/lo6aqocl5sd8ce3qoigpq8fp41/74544650924.pdf
    • http://targdenunti.ro/userfiles/file/zoxubaxilat.pdf
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d557cc68cd---56012492028.pdf
    • https://ivanda-commerce.hr/userfiles/file/42170939460.pdf
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3120dce3e---93498650733.pdf
    • http://se-ty.ru/uploads/userfiles/file/labexikebuguf.pdf
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/84d112e71879704acc288e00fed07775/mekanabojaxadimoropu.pdf
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/5fa59cc36c9d46a15c77125a81148ebb/72091091084.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb679ddda86---27693578059.pdf
    • https://thefertilizergranulator.com/d/files/gosaku.pdf
    • https://dunaweb.co/bg_image/files/xovugisusitumun.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=tony+romo+and+jessica+simpson+married
    • 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_off00017ef0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x17EF0 16792 bytes
font_01_sfnt_off00019702.bin
2d9fa19eddff90b79f5937b2ad96e285430fd165253748c4576dc275b898c264
pdf-font-stream PDF embedded font (sfnt) at offset 0x19702 17632 bytes
font_02_sfnt_off0001c548.bin
60f2a790cc137c90708047733b5a727956f72e8e359a1833a9ce42b8faa7c994
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C548 10740 bytes