Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cca945c5f7e458b…

MALICIOUS

PDF

133.4 KB Created: 2021-08-03 00:33:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 6b071e70b26180240e61d8b339571aff SHA-1: 9e24243753980b26cb31b0d7838eb8759b77b627 SHA-256: 6cca945c5f7e458ba6ae50046bd84c67dc73be19fa5e1f6985e72f36608e6215
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF document contains embedded JavaScript and external links, indicating a phishing or malware distribution attempt. The 'SE_CLICKFIX' heuristic specifically points to a social engineering attack designed to trick the user into running a command, likely to download and execute a secondary payload. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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://ketchas.ru/uplcv?utm_term=need+for+speed+most+wanted+2005+pc+money+mod PDF link annotation
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd1de36a410---70331778682.pdfIn PDF document text
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/a111b45f9bbdb35e9163d320a4ab8c20/fuvipotenixe.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff32425854---zajom.pdfIn PDF document text
    • http://chokmanee.com/userfiles/file/48938239705.pdfIn PDF document text
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16080e992a2126---wawovaturoxudiguwes.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608abf4d1df9c---fuwonazi.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab6370cd8dd---88112371330.pdfIn PDF document text
    • http://apartmaji-zunicmile.com/uporabnik/file/ripuwin.pdfIn PDF document text
    • http://intersonik.eu/upload/files/75239088109.pdfIn PDF document text
    • http://osullivanspressurewashing.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5e879a0692---51466239874.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/7fhc3adidffq1il0riaruj01k8/59258888191.pdfIn PDF document text
    • http://thaiboxes.com/piceditor/file/tibarosojojofoxaridi.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/zaxanuxogozadafodobi.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d5a5b50009---surepebezonorebitolipon.pdfIn PDF document text
    • http://hkalc.com/userfiles/68784823588.pdfIn PDF document text
    • http://rama-sp.com/rama/webroot/js/ckfinder/userfiles/files/46279446843.pdfIn PDF document text
    • https://mobiligennari.com/userfiles/file/50583825670.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/87982288f8dcd9692a322b241898b879/kovijikesebe.pdfIn PDF document text
    • http://webinaris.net/ckfinder/userfiles/publics/files/3628559035.pdfIn PDF document text
    • http://velocimapper.com//webfiles/file/sinotabenigazidubaxofavo.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16100672c2f880---2632979773.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b744f8252b9---sujulutigajasaxedolozine.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b581489fd51---jitagilixuzejokukimarura.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c0f74712e---fadigupabiraminemokabeva.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_off0001a358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A358 11196 bytes
SHA-256: 844e6d047fe20dd8b29fd5466df5224a416fb25aea0b2081f6323a9668115510
font_01_sfnt_off0001bdc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BDC3 18188 bytes
SHA-256: cbd5309334f9c022e11f0705ba724f578a4bf9258b1b845955d14e2a1d657d3d
font_02_sfnt_off0001ee44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1EE44 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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