Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe591cce22075586…

MALICIOUS

PDF

95.8 KB Created: 2021-06-26 12:58:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 40db92df2b42389d99395269f6ce44c1 SHA-1: 3c02f23b4c402b435ea2c1cc457fa7c1709ca4fc SHA-256: fe591cce220755865f611f166e187d62b6383533e682f54653f041690ac6bfee
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites hosted on compromised WordPress installations and disposable domains, indicating a link farm designed to distribute malicious content or phish users. ClamAV detection and ML classification strongly suggest malicious intent, likely related to phishing or malware delivery via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

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://hanahana.vn/media/ftp/file/30219723669.pdf
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/97fe520d098e720435f443d3b98d8197/56635318903.pdf
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfa6db46ef5---janapinijawika.pdf
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/98bcca0bfe3709cac4eaa065e2f09508/665353994.pdf
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16080cda87ee43---10464325584.pdf
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/5cf1fd8d82c57dc2738d17f1d71ab351/77042677186.pdf
    • https://menu2uplus.com/images/file/mibemipexut.pdf
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/f915a74fefe75e678aba5ccac2058e22/tapojosugasutalapemebizog.pdf
    • https://kermoulin.com/userfiles/file/56401172094.pdf
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b664522d87a---98406046726.pdf
    • https://imagebeaute.fr/userfiles/file/vorizafex.pdf
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/ef58f92ffdf89a16f6627ebb34cc3f99/72175610969.pdf
    • http://barbusci.it/maisUserFile/file/gakonidirotujebejitu.pdf
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609d3fac8bfde---nufon.pdf
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1606eec8ea857c---ribukemisurod.pdf
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e72b32fa7---31493828877.pdf
    • http://angeladaniel.eu/uploads/files/73318741541.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c68c82456---jofubasoverilisofebiki.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/357e6e776579d5990ed5b16b8834647a/17713537529.pdf
    • http://toshiteriyakiburien.com/uploads/files/rolavurifotodixozetobirev.pdf
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f63b48b016---83439319958.pdf
    • https://invest.pl/userfiles/file/visifanuvumuwugaxevisi.pdf
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b997accc5d8---33287077645.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606f0f6b2712d---94437966784.pdf
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16076fc0e8396f---lulunawilanepewib.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=adnoc+interview+questions+and+answers
    • 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_off00011172.bin
a1f972586deca7334115f5b6af4e2449af4b5757241807a350599f916f84b482		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11172 10696 bytes
font_01_sfnt_off000129fb.bin
6b6adccf12ac26dc676bbaffd0233f93a46cd8295c2ea92ce84ab62515de7320		 pdf-font-stream PDF embedded font (sfnt) at offset 0x129FB 18376 bytes
font_02_sfnt_off00015989.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15989 16792 bytes

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