Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea7c9c0ca64909f1…

MALICIOUS

PDF

86.0 KB Created: 2021-07-04 06:12:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8f2f89c934bcab61019e23da503f37f9 SHA-1: 47fa34fc8425c4119e90f2c5ccc32c7046dbcbf4 SHA-256: ea7c9c0ca64909f1f5b21ba937c97f3f7a2f524c98c7ee94832f309ab136220d
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The sample contains embedded JavaScript, which is a common technique for delivering malicious payloads in PDFs. The PDF also contains numerous links to compromised websites, suggesting an attempt to host and distribute further malicious content. ClamAV and ML classifiers strongly indicate malicious intent, likely phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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.
  • 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.davinci.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607267a602bf6---jolovagadetoruramipafuza.pdf
    • https://assurancemauricie.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089e6b3e1afb---berakipepaxatajusame.pdf
    • http://musclecar-taps.com/js/upload/files/pifubodisanef.pdf
    • http://tourister.kr/userfiles/file/xozinubakesopuzeva.pdf
    • http://crmrealty360degree.in/userfiles/file/95869329407.pdf
    • http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607f1f9c13ffe---livepazevenadetizafoli.pdf
    • http://drive4smilesontario.ca/clients/e/ed/ed023a0734c265ca673a92d1d81de675/File/82354000294.pdf
    • http://xn----itbbfrdrdbd4bgy6gi.xn--p1ai/webroot/files/files/kitumigimoxuwagobu.pdf
    • https://www.emmabowman.com/wp-content/plugins/super-forms/uploads/php/files/c738dee88b63c48f2b43754b80f78fa8/53488060554.pdf
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad97a12b3ab---3472691053.pdf
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bc02023fd4c---rirafugutim.pdf
    • https://akproauto.com/nbloom/fckuploads/file/95105395983.pdf
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/43abe77483e6d1cff45b55522546e8b3/tevazumileduzan.pdf
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/160941d8ca9d9c---purira.pdf
    • http://fipjp.com/userfiles/file/65765101764.pdf
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/3a2d530579c218a9460078172f9c327d/muvenuramapodagidejavas.pdf
    • http://ecole.ru/text/images/file/labofigazegoser.pdf
    • http://zuche0551.com/upload/file/fokitunaladozovanopo.pdf
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b32c9650ee2---xepesivasavetoxubifukali.pdf
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab62be7eb6---71022206021.pdf
    • https://kovosluzba-praha.cz/res/file/29809451408.pdf
    • https://www.clubmanizales.com.co/wp-content/plugins/formcraft/file-upload/server/content/files/16098442fe9eae---dekadunikovigaxofadipaw.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/1hnkh4aif3qvpmf5llfjmad686/gavidifawomasawuz.pdf
    • https://thesaddlebank.com/wp-content/plugins/super-forms/uploads/php/files/q1crn7vl3319vlq5c5cm6rp35u/1375418420.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6c2093cb71---89494850825.pdf
    • https://fertilizergranulatorprice.com/d/files/duzim.pdf
    • https://promocionesnma.com/wp-content/plugins/super-forms/uploads/php/files/63cd0262f192ff14086e64c2ad9d82d1/53357093629.pdf
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/5b562fd8aa53fc17cb3ef7f30930b231/96926770584.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=3+laws+of+thermodynamics
    • 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_off0000eb10.bin
889dedb100b0dabbf70fe15f35de7b98562352584202cbd72a26c468420e9eb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEB10 17592 bytes
font_01_sfnt_off000118b6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118B6 16792 bytes
font_02_sfnt_off000130cd.bin
ed81b7e0aba61627babea27794d745e9331cbd0b8dbfce2e2f32b606948317ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x130CD 11016 bytes

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