Malicious PDF — malware analysis report

Static analysis result for SHA-256 6cecf42512492702…

MALICIOUS

PDF

86.0 KB Created: 2021-06-26 15:41:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 261aca3f7573ad0ef37cc01bf486d92a SHA-1: 60470f5f5c08b6690d4486345cc40c6f34952781 SHA-256: 6cecf425124927027f15f67bcf8cabb6eb3edaf90742527709cb0affbef95a0b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised WordPress sites and other disposable hosting. The primary purpose appears to be directing users to malicious content, likely for phishing or malware distribution, consistent with a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://smidgel.ru/uplcv?utm_term=mist+hotel+and+spa+ehden
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943f9e47332---jivujimekamenam.pdf
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7e081c6b12---detukepelalifajona.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/60fc4152b4edddf20fc83e78ed755e92/mudujuxezevaweterijuj.pdf
    • http://olgapolyakova.com/files/files/57976954296.pdf
    • http://re-view.online/fckFiles/file/48348121091.pdf
    • http://www.benvenutialmare.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099562c4a994---9147984273.pdf
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077f5c554ab5---77218329744.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7cd84e0893---lufiwadidofejorebirek.pdf
    • https://aduanaldelvalle.com/userfiles/file/ruxujolabizas.pdf
    • http://blessedfamilycovenant.org/clients/c/cb/cb727bc273eb4203dc66fb73741ae5ae/File/vovixunitufituwowoz.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160984583ca5a6---vosexurifikada.pdf
    • http://smolensk-bakaleya.ru/userfiles/file/93434113382.pdf
    • http://paradisoseminatrici.it/userfiles/files/fotesexuvos.pdf
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be795fa41f8---39438343134.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16099ea496b885---dawakagefasezafevi.pdf
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/35596730977.pdf
    • http://3gr-group.com/ci/userfiles/files/32515033629.pdf
    • https://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d71f5e674ee---98974830175.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/e9bd881d17ab6cd5c1d3aca40aa2beaa/bexaso.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e00cccc0e---betomitesikimeroxi.pdf
    • http://www.sunarsurdurulebilir.com/wp-content/plugins/super-forms/uploads/php/files/cr5dsrjc9tu816lkch1dgi1fv1/jimurijifazepokipiwutaz.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eeab.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEEAB 16792 bytes
font_01_sfnt_off000106bd.bin
979f65aeb905acdc1d3955c2bb260d0032f6fbf107fe3a0261d12e9e8319f0c6
pdf-font-stream PDF embedded font (sfnt) at offset 0x106BD 17096 bytes
font_02_sfnt_off00013393.bin
ed373e46748ce07decc378b9aa78a48bc7671c50122a0e761bca59f1d32e9309
pdf-font-stream PDF embedded font (sfnt) at offset 0x13393 10384 bytes