Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cc843d5d1068feb…

MALICIOUS

PDF

101.8 KB Created: 2021-09-01 19:56:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: d13dd59b4b4fc54de25fd53cb2789d88 SHA-1: 45c08fb2c50fd33c008f1797bdfbe7b2fc62fee3 SHA-256: 9cc843d5d1068feb4373e09b5d5508af6ada3bcd3677e713f9696d7009fbaa55
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised WordPress sites and other disposable hosting domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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.
  • 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://queure.ru/uplcv?utm_term=uses+of+tin+and+columbite PDF link annotation
    • http://martonaroniskola.net/userfiles/file/telexe.pdfIn PDF document text
    • https://www.duffylighting.com/wp-content/plugins/super-forms/uploads/php/files/46f097cbb1877f5935af1831e138d1e7/34053922682.pdfIn PDF document text
    • http://pc75.net/upfiles/file/1625644754.pdfIn PDF document text
    • http://businessplan-capalpha.fr/mbp/upload/images/images/upload/ckfinder/95034978040.pdfIn PDF document text
    • http://heilpraxis-pankow.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610e4855e5d82---82416238050.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/lusiduxovixizitirapimoni.pdfIn PDF document text
    • http://chothuexeninhbinh.net/data/dulieu/files/85993021910.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/161250530834e6---tedawuveramopelegobukaxow.pdfIn PDF document text
    • http://rayzerfamilyreunion.com/clients/0/08/08e2d5bcffca37c2e1a82d364f4296c6/File/29854872633.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16116e7129a16b---32419048149.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/711c412440d298d39867921b2f01eb05/vavakefazaduxajojeni.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/afa6bc722eb8a6155d75a274140a7351/30776064511.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160aa79355e646---tuxivepizatur.pdfIn PDF document text
    • https://mtmnetwork.net/uploadEditor/files/kovop.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/2jveke3d1uhm23314219e8nm73/wiwerofakinukumej.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f8ae92721ea---kuxuzagokar.pdfIn PDF document text
    • http://scro.ru/pic/file/wokideb.pdfIn PDF document text
    • http://hoteldanang.vn/uploads/images/files/zutigemesuji.pdfIn PDF document text
    • https://seedomoretravel.com/files/files/xavum.pdfIn PDF document text
    • http://astorandblack.net/emailer/userfiles/file/70824873629.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16087c3209d419---nevotajibibixobolaz.pdfIn PDF document text
    • https://geo-decouverte.kenamedia.ch/ck/ckfinder/userfiles/files/xusupupogumasapeji.pdfIn PDF document text
    • https://www.birdandwildlifeteam.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce87df4a92e---58982476267.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_off00012227.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12227 20696 bytes
SHA-256: 648426a84bc607f7a53a226e67aa6798623ccc42919c422e31eeea136da3dd41
font_01_sfnt_off000158ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x158ED 10784 bytes
SHA-256: e82fa198f2fde5b1abda75a4f5a06f41e73040f957815349e57149108587b5fd
font_02_sfnt_off000171c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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