Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c18fadceece290d…

MALICIOUS

PDF

72.7 KB Created: 2021-08-30 18:45:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 59b4de8871dc7ef7d4799ba97c8870a6 SHA-1: 1c7417e90e48a3f44880f0dbf7a1d913044b7060 SHA-256: 6c18fadceece290d96e80f40773cd2d7d0def225642a68e67e045bf937b3d81b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or scamming. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=how+to+cite+a+quote+from+a+movie+apa PDF link annotation
    • https://costumeworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e1006e0f7---96627946084.pdfIn PDF document text
    • https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/matj1tqbsm37qi5bcd8eok9etn/97391551207.pdfIn PDF document text
    • http://bolshunoff.ru/images/wysiwyg/file/nevik.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/6f43ai7b6o1oafllr0l8bckc2m/genorejigejalarotidetadum.pdfIn PDF document text
    • http://constantemails.com/userfiles/file/1625878874nopilozurojokipimav.pdfIn PDF document text
    • http://canadapremiumlubes.com/survey/userfiles/files/pajirusapibokubeki.pdfIn PDF document text
    • https://confidence-ist.com/ckfinder/userfiles/files/kulatik.pdfIn PDF document text
    • http://alexlunacoach.com/img/editor/file/83427923126.pdfIn PDF document text
    • http://dekobonner.de/userfiles/file/ludose.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021072800431073499.pdfIn PDF document text
    • http://dfh-consulting.com/userfiles/file/vijezagewolegodixupezop.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/b6daae032c6fa68ad5d494142ba85622/ronufanimeve.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/d057f36267554aa35f0e1dcdd3a38578/3981639836.pdfIn PDF document text
    • http://imbirimbir.ru/files/tevetewele.pdfIn PDF document text
    • http://hum-lucknow.org/test/fckeditor/file/88575223635.pdfIn PDF document text
    • http://www.niziointerior.pl/upload/file/wagekabekijuvoliz.pdfIn PDF document text
    • http://mispuntossaga.com/campannas/file/powixi.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9a6dda7e3d---55580306467.pdfIn PDF document text
    • https://mfdesign.hu/files/file/fikipisukaxo.pdfIn PDF document text
    • http://shinies.ru/img/lib/file/digedosubomasorobaje.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b5bae44c832.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/1264082432.pdfIn PDF document text
    • https://szekszardportal.hu/userfiles/file/29783997053.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a8e5d1985a6---komupumabazazuvanufurudim.pdfIn PDF document text
    • http://gamecoast.by/uploads/files/11559493937.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_off0000bbdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBDB 16044 bytes
SHA-256: c87e7d8511f197e3f2147e1e435ded7125b8dca980d542010fc8779f476254ca
font_01_sfnt_off0000e400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE400 10712 bytes
SHA-256: 462346d08db5fd94f92022d3f6e94156a4b192237b0f28eddf6106ac33da5343
font_02_sfnt_off0000fca9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.