Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eec2860d3f0cbfa…

MALICIOUS

PDF

80.6 KB Created: 2021-08-30 05:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 4b678f1445b5a08b69ab969b5c27ce8c SHA-1: 6e0c73a950f54e86a2879248a040d4d21b76c6c4 SHA-256: 7eec2860d3f0cbfa00306a1518025ad0d24ca16ff3ccdd4c07385a0f4fad2c4f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and URL analysis point to a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://oiweld.com/wp-content/plugins/super-forms/uploads/php/files/f4df342c708d1a0010efafc27e89f4b5/28712195493.pdf In PDF document text
    • http://dbjhockeytournament.com/clients/f/f9/f9ff496842c877cbb4522510b668f2a2/File/fafanizosada.pdfIn PDF document text
    • http://bundoreh.com/fckeditor/files/file/62144906235.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/7007128914e94a2f10b63e6382eeb2f9/tolesonovataxe.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/45bsthcsdm5dr9at1aoqa857p1/74932186303.pdfIn PDF document text
    • http://lahma.pl/_u/userfiles/file/85611365943.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/mpqs58lso9esi8n4470of1ees7/nefaxaburomolalikafo.pdfIn PDF document text
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/a2209lsbh6ltkj51c0s1lmcvkg/videdufajuzaw.pdfIn PDF document text
    • https://lasvegasrebath.com/wp-content/plugins/super-forms/uploads/php/files/21078fb47c27abf2cd07cdad6ac7cb03/69819976354.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bc12e469ad4---busaramipinomupizeme.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608700d128bdd---kesawofusirojatisaj.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210817_4FCE91BB0E4CD2DB.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/seban.pdfIn PDF document text
    • https://trsbarriersdirect.com/wp-content/plugins/super-forms/uploads/php/files/hjs3bjgovicvgig2us038nhtag/14564381533.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/74204758373.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca8fa5732a---74999843506.pdfIn PDF document text
    • https://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8692da06fa---66855821287.pdfIn PDF document text
    • https://bestwaynepaltrek.com/ckfinder/userfiles/files/83170044306.pdfIn PDF document text
    • http://www.oiseaubleu-promo.fr/userfiles/file/zaloxirixozodulok.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/skd26mgphtgfkt4p5g8t6apbjr/pimikeveluvitin.pdfIn PDF document text
    • http://s-moonlight.com/CKEdit/upload/files/5928739138.pdfIn PDF document text
    • http://big-blue-bus.com/pics/fotos/1/file/29532947548.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/83508031123.pdfIn PDF document text
    • http://mnarch.it/userfiles/files/4958815846.pdfIn PDF document text
    • http://wecans.net/_UploadFile/Images/file/vuwofafi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=barefoot+on+the+grass+meaningPDF link annotation
    • 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_off0000dae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE4 10668 bytes
SHA-256: 0d26dd8625df564f372cc9008d18933314785535074a7b1639b2dbcf20c2df8f
font_01_sfnt_off0000f32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF32C 16112 bytes
SHA-256: 038b2f731fdd3a65396426453923714793c139ae046d65179c3675e428d75ee5
font_02_sfnt_off00011c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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