Malicious PDF — malware analysis report

Static analysis result for SHA-256 022f30c5f28c6f55…

MALICIOUS

PDF

86.0 KB Created: 2021-06-30 00:02:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 29e00dd54e41049db3be138521dd6c0d SHA-1: 04aca2275c6751aea2529499f72861a7877f963e SHA-256: 022f30c5f28c6f559b85167c16808953f06973fd81d610d0380e86e6ee3d1435
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URLs point to an attempt to lure victims to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://laborke.ru/uplcv?utm_term=the+third+law+of+motion
    • http://growlink.biz/userfiles/file/39604892276.pdf
    • https://zionapostolicministries.org/uploads/file/xudixemubimupivimezowazew.pdf
    • https://bnbtravels.com/ckfinder/userfiles/files/76976158665.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160842d43985c4---45411966631.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f6cb69b32---revobureniv.pdf
    • http://lafenicealcamo.it/userfiles/files/15659242169.pdf
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/su4n83tanndp1onub0qj9tceme/fofes.pdf
    • https://akarchlight.com/wp-content/plugins/super-forms/uploads/php/files/1b47897fd61ad56772715cdabc7f45ae/17477791817.pdf
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/f2e18b552c37c5db2727f517a0fd9d35/bifarunorozevowe.pdf
    • https://djennebeads.com/nbloom/fckuploads/file/42095556809.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/2b9b2868c734c28b6bc1c0138f1f84f4/23920472972.pdf
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160868b70104d5---bevasomixumolotutije.pdf
    • http://www.pianoszimmermann.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160790bc64bd90---limajovegizaxika.pdf
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/49adb5faf896eef2f6e8a09efee2085f/82017529580.pdf
    • http://lapenya.cat/imgjovesnaves/file/58647303061.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/l46b6c1voqr7cl7jpi07ed156r/60918173736.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e53f74a9b---feduwoxinujaxepilonusi.pdf
    • http://webcertain.net/contentupload/fckeditorUploads/organization_/file/kusezoguxebuxiximisoj.pdf
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608623c4b2cf9---vajuwajudabitugazemisiwa.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7fdf9c6407---lezawaru.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160801595e6d97---nozusagijemanagavex.pdf
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160765d251bd40---jenixiwazasosalebakalisuw.pdf
    • http://czdashan.cn/uploadfile/file/2021053110161173499.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160acee478d35c---56775402488.pdf
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160803c58adce8---monujatetajesavagewe.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_off0000eb46.bin
e59985fe3651cccad167c93d9fd90a37f43f1e8184af1df38ff673b6f0a758f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB46 17544 bytes
font_01_sfnt_off00011914.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11914 16792 bytes
font_02_sfnt_off0001312b.bin
f1f91aac757da9aa58d8da2676b3a5c55798c793a7937aef6f3f40c4c82d092c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1312B 10500 bytes

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