Malicious PDF — malware analysis report

Static analysis result for SHA-256 360307669ef3519f…

MALICIOUS

PDF

89.0 KB Created: 2021-07-02 19:14:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 12ae31f6b1dd3d9d8a469080ac8de239 SHA-1: 40b4d2461e2b02de39c6cd915c6372c2db9a64dd SHA-256: 360307669ef3519f4cf7a08a9e9155f20a675c7e52b7ea256fc436a26f5097f0
156 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple websites, many of which appear to be compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or phishing pages. The file's structure and URL patterns suggest it's part of a campaign to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://mwflower.com/upimagesfile///47923572125.pdf
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16084fef053da1---20973750479.pdf
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094518f24394---35541172288.pdf
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/c72d04211905f2a40ecd9ed0d93d4456/melom.pdf
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d1889223c19---xutivazejutu.pdf
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a18391cbc0c---92323912954.pdf
    • http://autodilykanka.cz/cmsimple/images/file/karotokifer.pdf
    • http://morgancountyoh.com/userimages/63476937905.pdf
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ba52d7c30a4---37858169845.pdf
    • http://dieta-plus.pl/userfiles/file/mikuwosolugelisosatinol.pdf
    • https://estidevelopers.com/wp-content/plugins/super-forms/uploads/php/files/5ddfd4a26cf075a3ca3809aae57324b6/sosowibupebowikiwotera.pdf
    • http://antwerp-rentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a05c9e63dff---wilusesurutonevel.pdf
    • http://krzysztofmalec.pl/gfx/fck/file/vividavujopazo.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/160943ad487e85---57793716657.pdf
    • http://sbsinternationalschool.org/sbsisnew/userfiles/file/65055226400.pdf
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16079a6593f9f4---nasobelutijubiseji.pdf
    • https://haidangpc.com/contents/files/2100352619.pdf
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc3ee5804e---betozi.pdf
    • https://securityguardsupply.org/php/uploads/file/vinafisabatud.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a4c8239841---74212458627.pdf
    • https://izharfoster.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a97e126168---dubupakar.pdf
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609df779cd449---diwomugopagewi.pdf
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/70153486cdbedb104a515bcbbd3d2f48/gubededatobajifufebewad.pdf
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16086a916cb701---1841620212.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/ovh62upttmf2akdt8bua0acjd1/88147552455.pdf
    • https://adbetelparaguay.com/wp-content/plugins/super-forms/uploads/php/files/5ab06067eb32ab892e7cd23d44fba8dc/xiwefomiragavufuzak.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=between+two+ages+pdf
    • 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_off0000fb1b.bin
5183078873dbb1c907e70962148ac6044643c96c39059ded596a991b2262573e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB1B 16740 bytes
font_01_sfnt_off0001265c.bin
68ff82ae2b62b70fb886faae50a7ab0449f05651bd078ddbb2fe24696b5f0713		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1265C 10576 bytes
font_02_sfnt_off00013e8d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13E8D 16792 bytes

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