Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff6dbc065e2ac012…

MALICIOUS

PDF

84.7 KB Created: 2021-07-02 01:43:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 64fba428516fe33e209f464dc6f34427 SHA-1: cf3160a4254ef03ca49b1e36237b0841985f58e0 SHA-256: ff6dbc065e2ac012dabfbdb10d4c2b816626dc8c36e81f790f0dc72c236c5261
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The document functions as a link farm, directing users to numerous external websites, many of which are hosted on compromised CMS platforms or disposable domains. The primary goal appears to be directing users to potentially malicious or phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ascensionchina.com/userfiles/file/15985101104.pdf
    • https://www.straightmyteeth.eu/wp-content/plugins/super-forms/uploads/php/files/414c8613b6a648c32db2a9aa720ca053/jeralonuxiwanepegetof.pdf
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093cd801c5f0---61691214607.pdf
    • http://www.bufolari.com/public/immagini/file/xudupuxobuzetapivanofiri.pdf
    • http://toicodonlyson.com/uploads/files/gipufoguwusigidava.pdf
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/19d9ef071596b39a8de7d85ed4175706/ripome.pdf
    • http://biosafety.biz/ckfinder/userfiles/files/zevubij.pdf
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160801c966ae01---venobagovibozaxavamupibo.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/965ced87326d317398985b26e71147d5/nitesujexogunowibusojob.pdf
    • http://www.primalegal.eu/wp-content/plugins/super-forms/uploads/php/files/30uivm0o49kjl8712m6n5lrgf4/jidozegopubafovejapodoji.pdf
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608666435be5e---76485251602.pdf
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a57aef1b9b0---gazodifagovozinugowofusoz.pdf
    • https://247hvac.ca/fabulous1/uploads/files/21523730300.pdf
    • http://foodsafebox.com/ckfinder/userfiles/files/vuxazudakadev.pdf
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/7ac603273bcd74b9be0236259079e8df/51869353553.pdf
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/8qff3hcg99tmecsd3kt9362vh1/22944066584.pdf
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c146bbf38b6---51737432078.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/d3c2b65ecc5bca549fcfa5fdc779eb8a/norukegofigorap.pdf
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16084adcd3719e---vunimafetakudibazare.pdf
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607402b94fde3---futorujodokubireluvamum.pdf
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/l56bqjril65g8h40a93kce19mt/nusefojapipomisami.pdf
    • https://cwlighting.com/wp-content/plugins/super-forms/uploads/php/files/c2115e4df4493edba2b640b4ea57b521/37191357012.pdf
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609470efb62c0---xepeluzanatudeta.pdf
    • https://www.advids.co/wp-content/plugins/formcraft/file-upload/server/content/files/16073d0ea94706---91531693037.pdf
    • http:///new-website.tld/new_directory
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=redirect+root+domain+to+subdomain
    • 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_off0000e7ca.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CA 16792 bytes
font_01_sfnt_off0000ffdc.bin
6ba7201bcdd9a3434a24dbd286f64eae2cb38facbf0ee800e3d055489306718e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDC 16988 bytes
font_02_sfnt_off00012cae.bin
cf320831d01de789d6f7d7bf5067d7e1776d9bf52e47d1ced2d3ee843f7e638c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CAE 10772 bytes

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