Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d11c7bdb276d046…

MALICIOUS

PDF

82.0 KB Created: 2021-09-06 17:05:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: ced5696df20989166ea042fdd2a0ec75 SHA-1: cc1338083a70e7c5967d7b3721292ce0f6b79293 SHA-256: 8d11c7bdb276d046ea02efab7e3ee8f5a20c1affc5174ff78d0f01a2710b2cdf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code or redirecting users. The file also functions as a link farm, pointing to numerous URLs hosted on compromised WordPress sites and disposable domains, suggesting an attempt to obscure the ultimate destination and evade detection. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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.
  • 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://wastran.ru/uplcv?utm_term=pdf+converter+jpg+love PDF link annotation
    • http://finsura-lifedirect.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a8fcb38291f---7188081490.pdfIn PDF document text
    • https://nonbodepsg.com/uploads/files/pebeguginajogerivuf.pdfIn PDF document text
    • http://ozari-ua.com/files/file/nuduzamugajetiguxaminorav.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0adb9f6d3---18121384659.pdfIn PDF document text
    • http://cambresisemploi.fr/ckfinder/userfiles/files/3203233136.pdfIn PDF document text
    • https://almondzwealth.com/administrator/imagetemp/file/15202258850.pdfIn PDF document text
    • http://saaretravel.ee/images/file/bativorexi.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/653156f66e41b2d369bb993e26c70b2a/ginewatiginubesataxazoko.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607221f55cb86---kudelivemiwawogoxujipaba.pdfIn PDF document text
    • http://sjatupornservices.com/file_media/file_image/file/99765536361.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/buzitovurogukadetamumizej.pdfIn PDF document text
    • https://yepsell.com/userfiles/files/lojojajavumojod.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/16121708beddef---wagig.pdfIn PDF document text
    • http://volvo-cars.jp/js/upload/files/denukajuluputizetewujid.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/035b310feb415e8edb97bc040cb99f11/luxonit.pdfIn PDF document text
    • https://cor.org.ar/wp-content/plugins/super-forms/uploads/php/files/ei007fbq8716c3oapl1h03lbtm/87070902286.pdfIn PDF document text
    • http://zwickerfoto.hu/_user/file/mifafazesikiponaxe.pdfIn PDF document text
    • https://samtee.com/admin/images/file/64342289031.pdfIn PDF document text
    • http://kientrucsangtrong.com/plus/files/63360318355.pdfIn PDF document text
    • https://saikekanglun.com/filespath/files/20210826143632.pdfIn PDF document text
    • https://villanakarin.com/userfiles/files/vakapulimajetejuz.pdfIn PDF document text
    • https://ymy-tea.tw/upload/files/51324186350.pdfIn PDF document text
    • http://www.platformliften.info/wp-content/plugins/formcraft/file-upload/server/content/files/160f61c261be4a---84066319565.pdfIn PDF document text
    • https://xn----7sbabak5acz7byau.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/03a7145eec6197a7969abf762a85cf24/gotizuximerujokasulowol.pdfIn PDF document text
    • http://spielundlicht.de/content_provider/documents/files/30045394429.pdfIn PDF document text
    • http://status.cz/UserFiles/File/padalozazuwumedagokif.pdfIn PDF document text
    • 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_off0000debe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEBE 16668 bytes
SHA-256: 3485808b02961b6f4757999483bc307b0ab16cfae5f9c07617acc7db49e31902
font_01_sfnt_off000109ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12203 10572 bytes
SHA-256: 5e685ba6372c684a321ab8c5b13d87e391341265c75ac39787463a873d9d4d83

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