Malicious PDF — malware analysis report

Static analysis result for SHA-256 02e8ac2e6d79f93a…

MALICIOUS

PDF

136.1 KB Created: 2021-09-04 06:23:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 9b022f19816681e188f128336c982091 SHA-1: 3ab37a2545bba17d51dc043a092fde047e49a440 SHA-256: 02e8ac2e6d79f93aa631b874d1d52be0f43181c9834d83bf0bba9770621b10a6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified the document as a link farm, with numerous external URIs pointing to compromised WordPress sites and disposable hosting, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

Heuristics 6

  • 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.
  • 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=turbo+x+smart+tv+32+manual PDF link annotation
    • https://plewmal-d.com/Uploads/files/97912913284.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/5lkjic77111klnctabla3t47h0/1426205469.pdfIn PDF document text
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/2401522959.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/0299283072d0cdef3f4d480e09c08651/30074195673.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/80526793758.pdfIn PDF document text
    • https://juvelyrikoscentras.lt/Files/file/40068912655.pdfIn PDF document text
    • https://marathonlaval.com/userfiles/files/fasifinibok.pdfIn PDF document text
    • http://haciogullari.com/depo/sayfaresim/file/44627369513.pdfIn PDF document text
    • https://inijariku.com/ckfinder/userfiles/files/44777710692.pdfIn PDF document text
    • http://au-coeur-du-temps.com/userfiles/file/31232417767.pdfIn PDF document text
    • http://tofuyatogo.com/uploads/files/37280906335.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/16093f6fdb7cb7---16599586705.pdfIn PDF document text
    • https://renault-service.com/userfiles/33565162316.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160815a3e8e426---mavelukopuguxe.pdfIn PDF document text
    • https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/708e61d18b13a1c4fcc6445e80df370d/24151815709.pdfIn PDF document text
    • http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bec95a6e3d8---22051980190.pdfIn PDF document text
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cfa2f078d5---sasexojafobadijosivo.pdfIn PDF document text
    • http://jhdjt.com/images/upload/File/91918379235.pdfIn PDF document text
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16070690729c82---mopogilakiwovitanopibedu.pdfIn PDF document text
    • https://elpmarketing.ca/wp-content/plugins/super-forms/uploads/php/files/40763284b23a3ea5909e5e3b57e165a0/najod.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cdaef44171---duveduxukepavakiseg.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16222969876309.pdfIn PDF document text
    • http://firstcuwire.com/file_media/file_image/file/fenozuwirejakozek.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608291417f6f9---42660236389.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_off0001a778.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A778 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001bf8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BF8A 21460 bytes
SHA-256: 914a43a6d24ec1a792c78e5f92fcdabb68883c9111c58932e4eefc7985a232af
font_02_sfnt_off0001f7ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F7EC 10708 bytes
SHA-256: 4c18f58c756ebfad8568e8821d5f55cbded5763105844b1dbc6713cc732c0f8c

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