Malicious PDF — malware analysis report

Static analysis result for SHA-256 f99eb4b288b2e097…

MALICIOUS

PDF

105.2 KB Created: 2021-07-10 00:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: acdd586ad79ab0e9555224eca4ca0319 SHA-1: 23383a03c3923adb30e3f59b87f62841088606c3 SHA-256: f99eb4b288b2e09789baf350c2da0cdee47a352b46533e2b7bd793114cc18abb
196 Risk Score

Malware Insights

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

The file is a PDF document identified as a malicious phishing and advance-fee scam lure. It contains numerous links, many pointing to compromised CMS upload storage, suggesting an attempt to redirect users to malicious content or download further malware. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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 http://domainecomps.com/documents/files/54548260217.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b73e761308e---najeralegusegawad.pdf
    • https://www.dekleinewerf.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160714de55d010---zamumarifevudojekuwozet.pdf
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/825a8330d6b0c87fc5868fd1fd70e3d0/puzozabugi.pdf
    • http://laboratoriodiprogettazione-ve.it/userfiles/files/27555664149.pdf
    • http://dnepropress.net/files/file/tutisolujujuruji.pdf
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/29a40ee28b2285d159cd0574850f9a39/zavoxesibutilurorudufi.pdf
    • https://patriciobanados.cl/upload/file/
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/af8osr9a6r9os9kur30kf47p03/57690192921.pdf
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/cde133a96fa7f46c0825a70b52cbcf64/zoderebeji.pdf
    • http://xn--zb0bw3kv4s8mn.com/upload/fckeditor/file/97355952048.pdf
    • http://arunimaflavours.com/userfiles/file/93151370862.pdf
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/5987ed4ff884d6aab7756f4c4b8abb45/39522253050.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/gne00op81ks9gakifl109bv6hs/zegis.pdf
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/okdnf41uefpsn6ttu32ff8fjh5/bolimupoxit.pdf
    • http://hyundailed.com/upload/editor/file/kalabijutokobugop.pdf
    • http://scro.ru/pic/file/7672097734.pdf
    • http://shopexpert.com/app/webroot/files/userfiles/files/64076923934.pdf
    • http://pmdrecycling.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607006f38ad5d---71719636781.pdf
    • http://pune-india.info/userfiles/file/95686815378.pdf
    • https://aldurra.ly/images-editeur/img/file/letikurasoladu.pdf
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1607da6b19c3be---75060904174.pdf
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/c9cf6e5a058f5303966e8275720e048e/riliwikajuwowagi.pdf
    • http://boeschfamilytravels.com/clients/43210/File/tepuda.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=the+guy+game+apk+download+android
    • 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_off0001382b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1382B 16792 bytes
font_01_sfnt_off00015042.bin
3f82e5f33a99c26f35cd690e9aa84610c2ab75eb3519f3abd4e32398e5f57b6a
pdf-font-stream PDF embedded font (sfnt) at offset 0x15042 10928 bytes
font_02_sfnt_off00016927.bin
ba88ce4161dcef3c9dd1a639cc6cd82ab4b5f93f361b8feb04c3362a53044cae
pdf-font-stream PDF embedded font (sfnt) at offset 0x16927 17596 bytes