Malicious PDF — malware analysis report

Static analysis result for SHA-256 d6f2b596ba1a8c1f…

MALICIOUS

PDF

95.6 KB Created: 2021-07-01 14:10:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9e86da4c6c40e54ff0d0e2a885957765 SHA-1: 455f2938cad92ba5b018f5d326eb70faaf2949f8 SHA-256: d6f2b596ba1a8c1f8866b6a54928b8d3b7ce88c17bda482fe4d4e4fd48a252db
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting. These links are likely intended to lead users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9853

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.tobywells.org/media/fckdir/file/32997311763.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac751c50c2c---tevaxasipamukefidexafukel.pdf
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/3e7f7db601d0b75a15c6d0a72bf6aaef/begetej.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608662a17e896---fakanuwizujulaxizijokoraz.pdf
    • https://www.reachcast.ca/wp-content/plugins/super-forms/uploads/php/files/f1cddadfdbcef0f7838618a63ef063c9/vupafo.pdf
    • https://www.colegiodesafio.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c94b18f3523---69569828177.pdf
    • http://immodraft.nrw/images/architekten_agentur_images_/file/61300543294.pdf
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbcfbda521---muvumipelofud.pdf
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa23c7c2a08---2524349824.pdf
    • https://www.brightfieldbusinesshub.co.uk/wp-content/plugins/super-forms/uploads/php/files/7tobhp4etb8qhdfrvlb1sl0egf/27688299641.pdf
    • http://schokoladenfontaene.de/idata/lezabuwapapevo.pdf
    • http://www.mmalappeenranta.com/tiedostot/files/31696347713.pdf
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd8561225e---20221257086.pdf
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b8b2c75e0b6---rosewigafunutobopoti.pdf
    • http://keacg.com/upload/files/zajovewegojo.pdf
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607415d6b8389---46533565374.pdf
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/160882b36d7c1f---48314462514.pdf
    • http://mutamobilya.com/images_upload/files/bovofosofesabukajujozavet.pdf
    • https://centrorevisionimonregalese.it/file/ximuxoraneretosekuferig.pdf
    • https://leunamgroup.com/wp-content/plugins/super-forms/uploads/php/files/1de4e87612a3d70138329187d47f8cca/55486841883.pdf
    • http://elsekmont.eu/userfiles/file/kuwovibopewusarag.pdf
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160a0434ad869e---86795403391.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/160bb87f8cf868---50646081654.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=insecure+meaning+in+tamil
    • 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00010f8a.bin
d9f5e66163d907df9b2c2f031b8906ab183602eda4757f3e8ef428a9cf922d60		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10F8A 18328 bytes
font_00_sfnt_off0000d2e5.bin
5ff4019532f389d1392358a329073a1ae305b0cb94d5dc7ce82fe396afff520b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2E5 25156 bytes
font_02_sfnt_off00012d2c.bin
ad77660accd0684510edbeda937710c47475ba1ccd558ea29da64e672110e260		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D2C 10504 bytes
font_03_sfnt_off00014507.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14507 16792 bytes
font_04_sfnt_off00015d14.bin
f1adc3218f47e25348972efcb9549dcdd338ce6deb8d044c9db3966479784daa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15D14 4608 bytes

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