Malicious PDF — malware analysis report

Static analysis result for SHA-256 86774af9cba7136e…

MALICIOUS

PDF

80.4 KB Created: 2021-06-29 16:22:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c75614391535ac2a49a242aa4e64f583 SHA-1: fae45b61f73df898a25f9bbe40836a59b71ec712 SHA-256: 86774af9cba7136ef948d4402dc37863b45130e72df56e277d1e203a3147d979
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'. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/8d7e25d3bef30d66209a9664295c3efb/jujozejadenibiwofoso.pdf
    • http://centreforeffectivecoaching.com/media/file/jojubenozoj.pdf
    • https://bodwellassociates.com/wp-content/plugins/super-forms/uploads/php/files/67328fe6a7564232fc807679c86a0591/15736407980.pdf
    • https://kodcomputers.ro/2664/uploads/vitopunosukatofofuva.pdf
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/4b4914513f191d6738855d60307a2648/73764491882.pdf
    • https://www.c2commercial.com/wp-content/plugins/super-forms/uploads/php/files/62b962554a9ae7ebc4639599d5fbb18c/36750955576.pdf
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2b878b497b---47557246766.pdf
    • http://yournamebadges.com/withyourdog/cms_uploads/file/66300913614.pdf
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/kmho72afsddue4b94rlp2gt6kh/86816503539.pdf
    • http://dorp.pl/userfiles/files/liguvisojotuxiwawikof.pdf
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/4gc5pmrndtjeaoj3eb300rni7j/norugukorexugulubozukef.pdf
    • http://oinworkshop.com/clients/6/6d/6d9161a7191ba42f41383a85782e2f4f/File/bizaninozagabogaxut.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160b35c2c3509a---sizalaxagizojeraxoluletez.pdf
    • http://harissarantis.com/userfiles/files/vonudelesun.pdf
    • http://erfolgsapp.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b22987a36e8---86422606631.pdf
    • http://chono.mn/uploads/userfiles/files/libovitolukekub.pdf
    • http://digemnd.com/UserFiles/file/59124783631.pdf
    • http://nmglyxx.com/userfiles/file/58597017139.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607da2d60f0ee---82488738536.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/1621709e043f98d35eb756634fefe6f1/miderutunafusosabefol.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/d61cf780a0594360b40cfcedc45988cf/buziwuxajim.pdf
    • http://blissrenewbeauty.com/newerac2c/userfiles/file/nuxomomoz.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=cloak+and+dagger+ultimate+spider+man
    • 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_off0000d3e9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD3E9 16792 bytes
font_01_sfnt_off0000ebfb.bin
1c35b8b79f5c2e5363ff669d255e48d70ebbef0b3b9598a6409fc123f4f81752
pdf-font-stream PDF embedded font (sfnt) at offset 0xEBFB 17444 bytes
font_02_sfnt_off00011991.bin
217604bd78fb7cd550ef0f8e190ac7c1a42a2706b818a2a4d946d6406c3ee4b0
pdf-font-stream PDF embedded font (sfnt) at offset 0x11991 10960 bytes