Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b9e22fb17a8b8ca…

MALICIOUS

PDF

133.0 KB Created: 2021-07-09 08:02:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bdcdc969ffab03d06c02bd8ad8a81ace SHA-1: 45740dad83f8a4b71fa7b9f8ace3b692a3120e37 SHA-256: 5b9e22fb17a8b8ca61ed657499c1e3849301dbcfe2509f64ffa64c2474826b96
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, a common technique for executing malicious code. It also functions as a link farm, directing users to multiple compromised websites hosted on various domains. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9907

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 https://medvor.ru/uplcv?utm_term=alone+meaning+tamil
    • https://soudurelausiere.ca/upload/editor/file/marubu.pdf
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f3dc9dce3---62177425405.pdf
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160b76d187c8c3---99145708665.pdf
    • http://shinies.ru/img/lib/file/21116818448.pdf
    • https://mariellatriolo.it/public/file/vipafaxeseki.pdf
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/0a413f7e0df70665e93d34fc419888d4/35012294223.pdf
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ipgdkucfuaascs0ckgmj74p5p1/370666660.pdf
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/f2993c0d8979b9866d5654438410a808/zobewuxefajizob.pdf
    • http://e-photo.lv/ckfinder/userfiles/files/73833725919.pdf
    • https://akproauto.com/nbloom/fckuploads/file/fopiwubirijatabenaxesiv.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/usv93jq4aldtvmpqiaqkmehvo2/51628018821.pdf
    • https://nikken-engineer.jp/export/sd205/www/jp/r/e/gmoserver/8/6/sd0748886/nikken-engineer.jp/fckeditor/upload/file/zemagasazulidob.pdf
    • http://turar-mussin.com/userfiles/File/wuputokam.pdf
    • http://iideree.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5d3c6322e---dinofavokawudusape.pdf
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/kbubfu3stm19ftip0s8j6jmjcs/xiboxa.pdf
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/53a7de0c0d5955bc9ae14b9dc75fee6a/12399054603.pdf
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e56e471a158---zozolulurutamokem.pdf
    • http://www.goldenlantern.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cb5e7e65b---resudinozojogedolotazoz.pdf
    • https://admonks.ru/wp-content/plugins/super-forms/uploads/php/files/e7f13d9619f1d697d6ce6e3bbbd79f40/49100875916.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608745c957180---74211277065.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d511d9169c5---49420349577.pdf
    • http://accessprecision.com/userfiles/file/90734685917.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_off0001aa3c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA3C 16792 bytes
font_01_sfnt_off0001c24e.bin
2f03e13a09326d6bdd3556adf11d63d574173665577615881f7e7452321baaf1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1C24E 17880 bytes
font_02_sfnt_off0001f06f.bin
d90861fcc088fa4cf1f60180dcd8740f3bf29fa0994617ea0b5673903c08176e
pdf-font-stream PDF embedded font (sfnt) at offset 0x1F06F 10164 bytes