Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9020e473ae05e30…

MALICIOUS

PDF

85.2 KB Created: 2021-06-26 17:49:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 83d65996da14aa5db4ba146022e6c99e SHA-1: 524d402fde9182795b9753d9f2c98de8770cf920 SHA-256: f9020e473ae05e30ea96d8e28055b794f1d8c70685023b21ab17d0e783c791f4
126 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised CMS upload directories, specifically WordPress sites, which host malicious PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick users into downloading and opening further malicious content. No scripts were extracted, and the document body was unreadable, but the embedded links are sufficient evidence of a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9834

Heuristics 5

  • 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.
  • 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://www.hediyevideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4eea184b04---88116567168.pdf
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/3ab5f1927cbcb56a3cc8fd13407ace07/99258309752.pdf
    • http://heyumpnd.com/userfiles/file///30806504565.pdf
    • http://laiyi-art.com/userfiles/file/jamaxax.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3973a970d---rogodakelinemupudefeg.pdf
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b219286b76f---5911177039.pdf
    • http://assushop.com/userfiles/assushop.com/file/69381567042.pdf
    • http://zoncmswebsitebeheer.nl/files/editor/file/pumigufezafogigibiwa.pdf
    • http://beytarimcilik.com/admin/editor_resim/file/37032635839.pdf
    • http://www.hussco-steel.com/husscofiles/files/57427198271.pdf
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/o963sb6q0fpq3johlscim8kcl3/giline.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b272f1212ab---zaxare.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/fbjricluhqkj1uf1ipn0cvqngu/dutiwiritipepebomonud.pdf
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/gl6defjmm44btcj61k42eqn3m3/79611683314.pdf
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/e2d7a3f4236ec8067c506bcc0e1de2b4/bigidukajixujowumomuxud.pdf
    • https://www.havanasalsa-dance-tours.com/wp-content/plugins/super-forms/uploads/php/files/13c47990c2e94e3b086c39844550aa85/94786346502.pdf
    • https://ijp2.com/contents//files/47187091812.pdf
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/9dee76492a937589f6c9dd3fc3f8a13f/12481998497.pdf
    • https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/cef9c1f19e71aa05ddd91247e64e4bc7/wugiwederekakigijeduxana.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087d47515949---26072348730.pdf
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/08493757323c3598cf6abfc508abe6b2/narezefadesaxod.pdf
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfed4163977---12076553574.pdf
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/o1nkb29h21n8mavdpqe46uvepr/gozanugebubunoposax.pdf
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cb56e1a09d5---fosolerapadinetidivufa.pdf
    • https://2greenchicks.com/wp-content/plugins/super-forms/uploads/php/files/4aba39fbeb599773013030635e96ddf9/38854566575.pdf
    • http://bannermaul.com/userData/board/file/begulisegesaranetin.pdf
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160800d08ce7d2---guwumetutitoragimijovi.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=faa+airspace+explained
    • 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_off0000eb26.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB26 16792 bytes
font_01_sfnt_off00010338.bin
50dab67f8c458db490aec577db5298979a29f7fcc829b78e975c075348ab83f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10338 16604 bytes
font_02_sfnt_off00012e68.bin
a5ff8517001bac6c974379dcd533d3876b0b595c65b68239bd76dc87284bd633		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12E68 10368 bytes

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