Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0f64fc2e5c90349…

MALICIOUS

PDF

89.2 KB Created: 2021-09-15 19:37:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 654ea5a77c9dd86a1802dee97c989c0e SHA-1: 4109bcb417ff4d6f547996ac24e75a5b909f4c4c SHA-256: f0f64fc2e5c90349a75348d64e982c245e99fe1f8374aa8a155f1665d116540f
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of a "trainer" keyword in one URL indicates a lure to trick users into downloading a malicious file. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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://huntic.ru/uplcv?utm_term=warhammer+soulstorm+trainer PDF link annotation
    • http://grandrosso.com/js/upload/files/59728889590.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/161402be17b390---44036763678.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/15200290723.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f42852ccbf---tuzigugifodofibet.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/161418c29a2282---goxenojotur.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613fe6db0f66e---47671059933.pdfIn PDF document text
    • http://aroma-es.red/yamituki-n/uploads/files/6805364018.pdfIn PDF document text
    • https://phukienbep.net/media/files/66920189892.pdfIn PDF document text
    • http://irina-beha.com/ckfinder/userfiles/files/38492491025.pdfIn PDF document text
    • http://cissi.it/userfiles/files/64700560910.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/16315272611.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/161393951d0571---41759396242.pdfIn PDF document text
    • https://alharithiforcameras.com/ckfinder/userfiles/files/xoxas.pdfIn PDF document text
    • http://hooleihomes.com/cms_images/file/70565714478.pdfIn PDF document text
    • https://www.db-ynox.fr/ckfinder/userfiles/files/banijizu.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16131d6904dcf1---79219907325.pdfIn PDF document text
    • https://somogyplusz.hu/files/surabilepevu.pdfIn PDF document text
    • https://www.afoa.org.ar/backend/ckfinder/userfiles/files/fowiwevoton.pdfIn PDF document text
    • http://bumsnab.ru/uploads/files/91774869019.pdfIn PDF document text
    • https://korzo-galeria.hu/files/file/pasifodoguwib.pdfIn PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613fc871be651---42384581823.pdfIn PDF document text
    • https://sarna-zapiekanki.pl/ckfinder/userfiles/files/16347229074.pdfIn PDF document text
    • http://hagelkonzept.com/userfiles/file/xapefuk.pdfIn PDF document text
    • http://mrspk.com/ckfinder/userfiles/files/nidaduwonalejofi.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF15 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF727 19472 bytes
SHA-256: ed07dcc4da4cf6ca2f144263b8144aa4e33807d85efff003f59f6e72f7871321
font_02_sfnt_off000128f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F5 10464 bytes
SHA-256: d411240801af39056de8115517e8288bfe070ab68bb83a7d6d3104e17ad837ca
font_03_sfnt_off00014085.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14085 16284 bytes
SHA-256: ed96195bb30b0fcf59979efcc4d3580ee538b47b66eaf76cf889242051cb5b90

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