Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba71617c827b1a3…

MALICIOUS

PDF

98.3 KB Created: 2021-07-01 21:44:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0fcc7a701649482bed4868fafdc750a8 SHA-1: 11ba3bda5c884f9a7021151e5815e19933844365 SHA-256: 3ba71617c827b1a34bd516129c608dd2a9577fad5cea088ab4666346764cab01
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, identified by heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM'. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The document body is unreadable, but the presence of link farms on potentially compromised infrastructure is a strong indicator of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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 http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab57faae314---68496950478.pdf
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3a8924073---pobadajusopobo.pdf
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/54afd776c440e3740c2a73555aba6195/puvef.pdf
    • http://j-line.ca/fck_upload/file/mubow.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/d5cb026c8d5a5fdef4e5ca933795d9bc/xeputuwuzasorodem.pdf
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fc89ae7952---76339309345.pdf
    • http://kingbikeonline.com/images/upload/File/76654236723.pdf
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9d296d7df1---91003552257.pdf
    • http://scamps.biz/userfiles/file/vonelikikimotunijug.pdf
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf9d5e3d4d---39779929333.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9165e2d2f---64559034390.pdf
    • http://podlahypilat.cz/admin/file/93545676604.pdf
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160821edf389db---bemowosatimiwolubimasexa.pdf
    • http://valifyrepapillon.com/clients/6/68/68e1c6a84db99a04c21676ff826d6e37/File/12577777044.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160bebcd67f746---57979222786.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/7ca6995d78d04fe1ddfce167eac767af/balabatuwawukirowufa.pdf
    • https://www.corridar.com/wp-content/plugins/super-forms/uploads/php/files/okm9s3lp5eo1sj9skru6l8rr0b/63968123832.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/5omghj341eeisf4k2pqflun141/duvowimoliw.pdf
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/d2b129ae022b7f4799f99f5ebecc2e7e/13482196659.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/dd040f420f322f885e4339d405cf3de4/43788821599.pdf
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cee9b557ace---85565397010.pdf
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/e17766681d73f71002d879abc63bed06/fatatolafonolujeperomo.pdf
    • https://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/e78b14e3d0d6357c8d5143aa717bf240/56928112277.pdf
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/ca9a8472c184b4f6b60877d04359a488/gapewovirudes.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=words+beginning+with+ou
    • 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_off00011466.bin
02b26fe65bef1b2d5af519bd15e9f170157cfd39017c0138446d0629dbdbb550		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11466 10640 bytes
font_01_sfnt_off00012c8a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12C8A 16792 bytes
font_02_sfnt_off0001449c.bin
d65916812a77e551a4852fde518e22b6dd162c4b6b150ed7337d39b8cedf169e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1449C 21668 bytes

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