Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e05db3ee01e19cf…

MALICIOUS

PDF

116.6 KB Created: 2021-07-24 08:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7c1666033f4503c7ea3fbc91b487d5b8 SHA-1: 982b0f7a9d09f4a57b7652613ae818d688fbf5c8 SHA-256: 9e05db3ee01e19cf378ca0a1123f1a9ec8c32db2c63e8fede7145d519829d382
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised CMS upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ampletrekking.com/userfiles/file/bijuwewifatome.pdf
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/2scakv2eq1lp1s6dds8keu60up/2088073251.pdf
    • http://windmill-bv.com/userfiles/files/3219503933.pdf
    • http://zonwering-belgie.eu/ckfinder/userfiles/files/kitilenitutogufofokekovu.pdf
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/sjsk4ljhbrmkfqkgajs4750bs0/2778725386.pdf
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/31df73a79b6c87a9cefc0af3cfa4f142/xakisafu.pdf
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/476f684e37a75a7c5ba7493de858b792/fukibemape.pdf
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/qbun9pd5t1j9b1mp9k6hovicr5/92084460095.pdf
    • https://mamo-tato.ro/userfiles/file/32932312853.pdf
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/meladi.pdf
    • http://cappellastudio.it/userfiles/files/58750944328.pdf
    • https://henklinders.nl/henklinders/upload/files/poperivifugulexubekapum.pdf
    • http://barudan.hk/UploadFile/file/20210521113005081.pdf
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/hbcphseb1soq4o114q7ukhg6nd/53427817437.pdf
    • http://hillandbrownfamily.com/clients/76964/File/40576113793.pdf
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/a9f9a9b86d147dd7566af53c9b2457e6/82864357946.pdf
    • http://campfirewtx.org/userfiles/file/73977675836.pdf
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/4nogq11nfqkk07vg4ql90d8eir/gujedopupogidonedazo.pdf
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160812bfb2e7c3---lulipufut.pdf
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/7sndebjfchjp3na9opv528eeer/34564061259.pdf
    • http://fotossc.pl/_files/file/jejita.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=la+iliada+de+homero+libro+completo+pdf
    • 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_off000156fa.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x156FA 16792 bytes
font_01_sfnt_off00016f11.bin
010966c1150ddddbc33227522809511dd10795bc60b9c0b41734080b29d18879
pdf-font-stream PDF embedded font (sfnt) at offset 0x16F11 10708 bytes
font_02_sfnt_off0001874e.bin
47aa1fdef5c9e825fe125b191201e1267d2f9b007ba70e7fcf3c51550c63ec56
pdf-font-stream PDF embedded font (sfnt) at offset 0x1874E 23720 bytes