Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec7f9187e713e580…

MALICIOUS

PDF

78.1 KB Created: 2021-09-07 06:35:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: eaedf04c71d9e1ccd1bd2745bd3f8340 SHA-1: 9230b771a5618678f076792ddf08742a1e8aba95 SHA-256: ec7f9187e713e5802acce169605bb0cdc834e600bf009d2a0819c5ad594a67db
156 Risk Score

Malware Insights

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

The file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external URLs hosted on potentially compromised or disposable domains. The embedded URLs and link farm structure strongly suggest an attempt to lure users to malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 https://huntic.ru/uplcv?utm_term=spiritual+gifts+definitions+and+biblical+references+pdf PDF link annotation
    • http://daphongthuyhueminh.com/uploads/image/files/55775377596.pdfIn PDF document text
    • http://angelcabrera.com/FCKfiles/file/vojurenorawajusujonufem.pdfIn PDF document text
    • http://buckleyfamilyofdarling.net/clients/0/01/017bf228c8331327bdfb67b1798bff80/File/20873883115.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/rulasunuxotomati.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/14d4ded71c1b67730d3485f76538f191/lewuzamexugarizone.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/xulupimapobozu.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160790faeab825---winotiximemewofod.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/1b22d252f7d63cb36b29ba3c94c6d6e6/figomutikazanav.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16093d37e70fdd---31823025173.pdfIn PDF document text
    • http://mankatomnclassof71.com/clients/e/e0/e0e8961458839910853a12af65841b27/File/simanu.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/161121f9f0f9a8---nibomowulo.pdfIn PDF document text
    • http://dianacb.cz/userfiles/file/bexidusijax.pdfIn PDF document text
    • http://wintec-samu.hu/uploads/files/71593874408.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf1169e9d27---44585629215.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078245d2f75a---vitudefu.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/duganqppr4h0c72bj0g715b2t2/86999443577.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6ebec6ce6d---85305956210.pdfIn PDF document text
    • http://stringquartet.biz/web/images/fck/file/73757358663.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/4f55b85e8cea13365b9366add41fb128/6406865271.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/vekenine.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/janusozole.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/addd85b0250558c2209a935de366b215/xekobaza.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/zibekipolarinukalafuj.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1611e8bd3394ba---55618271497.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/a692736f513744c35cdbaa08b7f299aa/67007718565.pdfIn PDF document text
    • http://theloanwala.com/userfiles/file/zinutusagu.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_off0000cae0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAE0 11108 bytes
SHA-256: 77874f723d7e93db5fe8cb1994541a30d590de5ee8f7cd70c2e03ed4b8424be7
font_01_sfnt_off0000e479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE479 17592 bytes
SHA-256: 91ce737bb8051d458a7c470f1809f02386cfd8109f7586d37ae4b44ca9991dd7
font_02_sfnt_off000111e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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