Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e5b31d3d9ce86be…

MALICIOUS

PDF

91.1 KB Created: 2021-07-17 12:48:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ef0e9f911a5025e484054c59000c3d05 SHA-1: f8223f69c82ace7dc01d12124704e32efb2a3fec SHA-256: 7e5b31d3d9ce86bef6191c814dc7a75e7cf359f896511a370968a4323b255b9a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF file contains a link farm pointing to multiple distinct hosts, many of which are hosted on compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body is heavily obfuscated and unreadable, providing no direct textual clues, but the heuristic findings are sufficient to infer a malicious link-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/5nbqjbccgvukpes7mrqfflnmg1/zutopilevasa.pdf
    • http://p-itos.net/admin/userfile/image/file/88077846841.pdf
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bfaf2c2b4b5---felitevibawuvupaxivetoka.pdf
    • http://interface-referencement.com/userfiles/file/gefabubanagav.pdf
    • http://timeyear-v.com/userfiles/file/kunexu.pdf
    • http://bkmarine.net/ckfinder/userfiles/files/1625889503.pdf
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/mo47h3h6lqs2r0qiac42jbsh9m/61003532643.pdf
    • http://intertexmedical.com/userfiles/files/fufatinad.pdf
    • http://velocimapper.com//webfiles/file/99386516973.pdf
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/44324abb93582de74698e5073a3b5294/89805283587.pdf
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d12786a29c---tupewexameza.pdf
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/hul72fvfi3vu8knvtovi5g3oeh/domixokugiwex.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be9de0a0511---66924501837.pdf
    • https://cls-toronto.com/wp-content/plugins/super-forms/uploads/php/files/87fe51fd734c86c5f6d58c6326490ba4/15313104200.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eecccccb5b---67126955109.pdf
    • https://jodhpurtravels.com/nbloom/fckuploads/file/jexufatufazokekenux.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4b0d6b5f61---gewowusonegol.pdf
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f7687b07f9---temejozibo.pdf
    • https://bushregenerators.biz/userfiles/files/83911356592.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16085fe7da94e1---jebojivufotapomodati.pdf
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed08c105f1---91031862257.pdf
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e57c6a45382---44483141357.pdf
    • http://efuegypt.org/userfiles/file/gadutogepudesofosukatu.pdf
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095af024db36---97213948337.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=hospital+sign+is+a+regulatory+sign
    • 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_off000102fc.bin
1abdff2899f51420ffc41c6bc2523aee5c69f43261e1e2465aaca8f4e3de6a9d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102FC 10632 bytes
font_01_sfnt_off00011b79.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B79 16792 bytes
font_02_sfnt_off0001338b.bin
e33090099764f52299c678532bd143576303adf969f91cc8ad477f1017c6b112		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1338B 16780 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.