Malicious PDF — malware analysis report

Static analysis result for SHA-256 b500d14071266707…

MALICIOUS

PDF

73.6 KB Created: 2021-08-09 17:16:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 555b92a1c3050a0728788d1e69bd54cc SHA-1: 849fbdbfa69c3ec2cf978d73c250fe4c64db5913 SHA-256: b500d140712667072da79a3e01c1b1d6d3cd5354329b6b36dfb2e4b247d1057f
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1105 Ingress Tool Transfer

This PDF contains embedded JavaScript and a large number of external URIs pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The presence of a callback lure heuristic further supports a phishing pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 8

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://pixomot.ru/uplcv?utm_term=how+to+operate+sharp+tv PDF link annotation
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/3u2r7i29jcb1npgtfpqadegjap/kazowev.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/3e45a292c1347eb5253cd94656be8841/banijefupevipasarirodiwi.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a746a47b9---voruxek.pdfIn PDF document text
    • https://costabravas.com/uploads/localidades/files/5784066317.pdfIn PDF document text
    • http://gaishachuukobuhin.com/js/upload/files/46775069485.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a61e32a48e---27773209735.pdfIn PDF document text
    • http://jfhconsultancy.nl/userfiles/files/bukejezipilemerix.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/cc73a175e4e8eaca89b8022e2db3f466/96353798698.pdfIn PDF document text
    • http://www.kowel.com/ckfinder/userfiles/files/1627815536.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/007317cfca58b6d4642de76437aa0197/nebavidavineleluzibuwuj.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608a01e54b201---52938823642.pdfIn PDF document text
    • http://poiskvod.ru/images/file/vetoxinoverukitumin.pdfIn PDF document text
    • http://osc-pribor.ru/products_pictures/file/29405521940.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098bd9773f09---tarudegev.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/4d24ad63f234d25edcd902784a574897/70188710593.pdfIn PDF document text
    • https://okazdedziecko.pl/_files/Media/file/5938422663.pdfIn PDF document text
    • http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/tuxituv.pdfIn PDF document text
    • https://ruta.hu/ckfinder/userfiles/files/sebanomexadujezuki.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/fijixuteg.pdfIn PDF document text
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/bebca8d8138fba3866d44a350da02311/bapizejipim.pdfIn PDF document text
    • http://cn-noah.com/uploadfile/file/sufojelurituki.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/9c23f8f7c0f761179c23a9cd866ae6ea/84118040767.pdfIn PDF document text
    • http://www.wcd.com.tw/ezadmin/ckfinder/userfiles/files/fetuluzizifipememuzededu.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC380 10248 bytes
SHA-256: bd65155c9f74d6a308762ade217fcb4ba05236b13032eb7db3eb830b5d41c0b0
font_01_sfnt_off0000dabd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CF 15136 bytes
SHA-256: 2df48318a988f2a179d36c4b2c09f63251b9f40ec091d0410c3b484e1b3c2aa9