Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fdf7509789a1f65…

MALICIOUS

PDF

96.2 KB Created: 2021-06-27 12:56:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8b6f66536094fe2495e2fffa486063ca SHA-1: 7291d0e56266a5ddc29e549722558136cd2f427e SHA-256: 9fdf7509789a1f657fea710af1aaca7f0b2022763a286fd956e20c89e1b73216
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress sites acting as a link farm. These links likely redirect to further malicious content, as indicated by the ClamAV detection and ML classifier. The presence of embedded JavaScript suggests an attempt to execute malicious code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075510f067b9---nisakujogesowixaxar.pdf
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/m3904vgn27e57pve4vgi3thke3/wapoviw.pdf
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/meftfoopeims61do142o51veii/22514635233.pdf
    • https://www.taxiserviceh24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c9c14cc2f6---24792667891.pdf
    • http://broadviewlibrary.org/uploaded_bvlib/file/26398133054.pdf
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/12979e4eb9e3d03391fd5c8634964ec6/jefulujuvisotiga.pdf
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608ac953491a5---93082089048.pdf
    • https://proxus.nl/file/13993164871.pdf
    • http://www.cenlaenvironmental.com/siteuploads/editorimg/file/dugilopokokizuxilewipifif.pdf
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160776a572e5fa---xoponemig.pdf
    • http://csc-028.com/userfiles/file/20210618022140_o3y5jo.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b2d64816f29---nigalufafasudikak.pdf
    • http://cardealer-space.com/js/upload/files/47701879506.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/nibso0m34fd32ohbhip0c93m13/85986667271.pdf
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1573eef64---27599636951.pdf
    • http://alexhoffordphotography.com/temp/files/file/vuwoximugexowakanuxobibe.pdf
    • http://cameradungphat.com/uploads/files/wejalofeveruvopidesatesil.pdf
    • http://dambi.pl/userfiles/file/33636703414.pdf
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e4fe34c8c661112db7a7ee59fe92ab7d/bulol.pdf
    • https://stollerco.com/testingsites/advantage_aviation/assets/media/file/limuxolepodagadojuda.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc386ea084---13119496536.pdf
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1694b7130---wikidexuxujolixilumo.pdf
    • http://bezpieczna-strefa.pl/wp-content/plugins/super-forms/uploads/php/files/fe90353d5e0f12e46f21de52dff08e61/regugamuvafimabegikekig.pdf
    • https://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c45ce8aae21---wuwafozonusonamufuluvulul.pdf
    • http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160cfe27cf292c---6827736586.pdf
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/625ca9a583bd0dc816043ef85cf3a785/fibetitajugidisazusimoka.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=resignation+interview+questions+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_off00011381.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11381 16792 bytes
font_01_sfnt_off00012b93.bin
16ab8e442ac6c0b8dfff42bd880e8d6861496719e4f8ae718e02d75f34f7491f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12B93 18064 bytes
font_02_sfnt_off00015aa3.bin
08738c9dfac3985dcb5758b05ad2971f5b30daac9b9dce42fa4ee53919a62705		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15AA3 10680 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.