Malicious PDF — malware analysis report

Static analysis result for SHA-256 46ff5b075d8705d4…

MALICIOUS

PDF

75.4 KB Created: 2021-09-01 00:44:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 93d3bf10530ab63a99b9b71c9822c755 SHA-1: 20812d965e58a95f0f82146b822df524f1589e0b SHA-256: 46ff5b075d8705d42326af8433c780ecc3dd5bb6f9a12f083856820f1d52b15f
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous external URIs, many pointing to compromised WordPress sites, indicating a malicious intent to redirect users. The ML classifier and ClamAV detection strongly suggest this PDF is a phishing or malware distribution lure, likely delivered via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://camile.vn/wp-content/plugins/super-forms/uploads/php/files/epm1vmmcl988b9e7ok589hut05/rugubuwexudol.pdf In PDF document text
    • https://slaterlighting.com/wp-content/plugins/super-forms/uploads/php/files/887f37a2e6165ef4ee4a4a83df67623c/teregukotesaj.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/b112c09eb70e408ff6e634d419e24b75/16309114874.pdfIn PDF document text
    • https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc17057b602---fuveluwilidaborix.pdfIn PDF document text
    • https://englewoodgrassfarm.com/wp-content/plugins/super-forms/uploads/php/files/a8155f07cc4673b2784a6a9d1c666bbb/lupaxemepaneze.pdfIn PDF document text
    • https://floridainvestment.cz/files/file/19809245297.pdfIn PDF document text
    • http://sequirk.ie/userfiles/file/vudufilej.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/801qbi7cv4s21cccj58f76lqrc/64492211708.pdfIn PDF document text
    • http://gsmontaggi.it/userfiles/files/18860052495.pdfIn PDF document text
    • https://drddvichitra.com/userfiles/file/finenonitanegotu.pdfIn PDF document text
    • http://ropesadventure.com/d/files/65780604648.pdfIn PDF document text
    • http://plafondchauffant.fr//img/user/file/vadeza.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a35545b32e9---babodegu.pdfIn PDF document text
    • http://bora.su/ckfinder/userfiles/files/37054371011.pdfIn PDF document text
    • http://amdind.com/userfiles/file/33148802619.pdfIn PDF document text
    • http://gunjanjain.com/app/webroot/js/uploads/files/56928237186.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076f11cbd546---18697124082.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/kofogotekexiv.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/66380ead9d27d700db9a2081f36ccbbd/wulofomasorumanoxu.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/71345631343.pdfPDF link annotation
    • http://midlandhigh65.com/clients/6/68/682e31fde28f8c6bff7ebba57332ef5f/File/webufebatufenuronisijid.pdfIn PDF document text
    • https://dhesient.com/media/68625286439.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/89cbf33b79979e1316ff5c76b87abae4/82304686492.pdfIn PDF document text
    • https://thesmithgrouphouston.com/wp-content/plugins/super-forms/uploads/php/files/77948b4b8c837f4bf8a22dcb264e62ab/29483357310.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=some+popular+american+phrasesPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF0C 15824 bytes
SHA-256: 0ed817494c867ef06c7f16e3e56c84facd2df5577e317f1053942d36e36cfcc3
font_02_sfnt_off000106ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106EA 10716 bytes
SHA-256: 4d5e2edc55729a341677edf68378c11de6678f46cfb67f7b0d7cdeb3fbbe306c