Malicious PDF — malware analysis report

Static analysis result for SHA-256 74eb145efaa961e4…

MALICIOUS

PDF

84.8 KB Created: 2021-06-29 01:24:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 3c79a2c1efb1ef1588de885875cbca4a SHA-1: 8fa6646fdc367b22d568ba63a6b14bea51b52d6f SHA-256: 74eb145efaa961e41740bea85e7cd13818061d125fd13e2ed7eb5f0dfe968a9e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to lure users to external resources. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of external URLs and the link farm structure are key indicators of the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://allytemp.ru/uplcv?utm_term=temple+run+2+game+unlimited+coin+and+diamond+mod+apk+download PDF link annotation
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0967f57cfb---fudadikanokuwovu.pdfIn PDF document text
    • http://kondicionery-vidnoe.ru/upload_picture/file/49219967056.pdfIn PDF document text
    • https://wamsconference.com/wp-content/plugins/super-forms/uploads/php/files/4f29834652c177793923453427c0b813/wewarexegiba.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1608099919ea7b---wokerupabonoriseb.pdfIn PDF document text
    • http://pchs1967.com/clients/b/b3/b38b0c0be7ceca4b309dcb684d78a7c5/File/zavibugo.pdfIn PDF document text
    • https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/160ad898962500---dukalolamowenumevanukib.pdfIn PDF document text
    • http://mientrungland.net/uploads/image/files/58160844081.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/42117454720.pdfIn PDF document text
    • http://kajsanordstrom.com/userfiles/files/loputikewegoruvilaga.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e56a733ae4---29141326802.pdfIn PDF document text
    • https://everywheregenes.com/uploadfile/qu26_qu106_com/files/gafojosafotexenep.pdfIn PDF document text
    • http://pwr-tech.ru/userfiles/file/kubijuzajimerikadasas.pdfIn PDF document text
    • https://nepalipublisher.com/ckfinder/userfiles/files/91533401875.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/2ed7fc28442b8e6183a1655da509d581/xuvamonuzupokobololize.pdfIn PDF document text
    • http://insfilings.com/skyzone_classic/upload/files/32803184672.pdfIn PDF document text
    • https://hopefor.today/wp-content/plugins/super-forms/uploads/php/files/afc499b23d017e54daf0fafed5414245/76488531071.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/78602044470.pdfIn PDF document text
    • http://www.aadhar-interior.com/userfiles/file/toxonebawitevuberesa.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e83060a212---godenufoxofeke.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092bff45d09a---zemakifubimeninomevi.pdfIn PDF document text
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607691ffdd38a---fumiferobuzonudarilakam.pdfIn PDF document text
    • https://www.lavishlook.se/wp-content/plugins/super-forms/uploads/php/files/bb5330b4f50e336e3f747257ec0728f2/25800324802.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210604_B0463EF1E9F5CDF5.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_off0000e5f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fe08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE08 11052 bytes
SHA-256: cedd14ce1f7bf1b55c702bcd83cb6967d6c9fcdff325943e784134706cc29b16
font_02_sfnt_off00011798.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11798 17640 bytes
SHA-256: 522bc0463f17d902550d1df30ebac42f91e83494d31cf5c4b0d57f0cefd79f42

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