Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e97cb80f074134…

MALICIOUS

PDF

84.5 KB Created: 2021-06-29 09:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8180d9ed1d7dea445e371dc52bc702b7 SHA-1: 5afb5b619767d8fa9e5f4de5e982cb96caee9d6e SHA-256: d5e97cb80f074134bfbd9577740402daada47cbdd4710afb7b2dcd751e8705e9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to compromised WordPress sites, indicating a link farm designed to distribute malicious content or redirect users to phishing sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the embedded URLs and the detection results point towards a phishing 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://synerhu.ru/uplcv?utm_term=my+hope+is+built+on+nothing+less+but+jesus+blood+and+righteousness
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c461990c1---81015989467.pdf
    • https://www.aironface.com/wp-content/plugins/super-forms/uploads/php/files/b279e06955683b5c84f12b7936aa4a98/92412561175.pdf
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/053417f503660e2644fd5679f17a36a6/71628831438.pdf
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b749b269a90---50686968118.pdf
    • https://seroinstitute.com/wp-content/plugins/super-forms/uploads/php/files/f9fd369dadea2ef1cd8578e6407579d9/tajogozezefo.pdf
    • http://retroldn.com/userfiles/file/78505068575.pdf
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a867c6fb8---kojixafarara.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/0a74179c3b1ab1bdc7b030c333ef53cc/vukimuloja.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/4a494754d5becbdf3d6f3e18b4fe6b3b/dazenawimanejuwel.pdf
    • http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099423b9c631---xijukuwotuvelotijufapit.pdf
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160b0617c6190c---60978855900.pdf
    • http://ranaghatpchsschool.org/userfiles/file/jenivowomigipewa.pdf
    • http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cd26762649---numomowamupugurebabidud.pdf
    • http://bogelaipigeon.com/upload/file/12773141482.pdf
    • http://vervesimuhub.com/userfiles/file/sevobimezi.pdf
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f5a86d0b55---donedofunidagivopamu.pdf
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b102cf9e9fe---tofigawusozujewapovewofox.pdf
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f3ef82b68a---27403871898.pdf
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/5c8ah4rl1tgjup1vtjdhk6hhpd/10179428723.pdf
    • https://brianhigbielaw.com/UserFiles/file/vigoxokavatapejuwugodixid.pdf
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1607097f686fdc---reromokokud.pdf
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097c8c60b7ea---17729838117.pdf
    • https://miaousland.fr/ckfinder/userfiles/files/tesijoxetemoxalozijimakog.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_off0000e60c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE60C 16792 bytes
font_01_sfnt_off0000fe23.bin
f1cba07ec195d517eae9290700c9462e99b97bd133b00eff9bb5522baa24b665		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE23 11148 bytes
font_02_sfnt_off000117b1.bin
96452a5acfbf8ade2ef37a58ecf80a3e5f2a00fc3446e3f851a325961da2ce2c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117B1 16968 bytes

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