Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0e171f62b5418cb…

MALICIOUS

PDF

81.2 KB Created: 2021-08-20 11:57:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a86f1771bcba546dcd3093684e039b80 SHA-1: 98d214bb0195f277a9e3ffb8ff2c729d88752edc SHA-256: e0e171f62b5418cb5c47164a075759d177fee3af0dc870453d302caa09c597d4
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous embedded URLs that point to compromised CMS uploads and disposable hosting. The primary purpose appears to be directing users to external, potentially malicious sites, consistent with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://irlanc.ru/uplcv?utm_term=what+are+some+examples+of+situational+irony+in+the+cask+of+amontillado PDF link annotation
    • https://www.mixedclass.com.au/wp-content/plugins/super-forms/uploads/php/files/si690aigu2edqsann2f9b97460/vojuxowekuzano.pdfIn PDF document text
    • http://sartor.ru/upload/files/65512154921.pdfIn PDF document text
    • http://teraval.cz/res/file/75058452465.pdfIn PDF document text
    • http://tinhdauvietnam.vn/upload/files/koniwifasafolerojup.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/so9b6lbke6tjoqvdm7ijfg6dt7/buxisigesasut.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/19664136918.pdfIn PDF document text
    • https://ratsimae.eemedia/contents/file/zoxowuresu.pdfIn PDF document text
    • http://tamilannuaire.com/var/www/vhosts/vps296430.ovh.net/tamilannuaire.com/images/file/difutewesagidun.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073088ddd324---79706273238.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d924c29fc5---66496674110.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607e24d31893b---puvabidoruloje.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160b0d97f4231e---besoso.pdfIn PDF document text
    • https://comodee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609003649bee2---xivafufegavunusopanopeme.pdfIn PDF document text
    • https://manenshop.com/upload/files/tipuzagik.pdfIn PDF document text
    • https://dalycity.com/wysiwygfiles/file/7144105081.pdfIn PDF document text
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6a96472e70---fepiwatidetutazesodonax.pdfIn PDF document text
    • http://sl-light.ru/design/img/upload/file/73766625666.pdfIn PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/90997135901.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/69320754965.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/f0e3ef5b94a5dae4427a4f2772bcc2f2/80318238628.pdfIn PDF document text
    • https://villamishkan.com/310renonew/front/images/files/67680310019.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/dulibolutazepavigibidos.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac136d42292---87401540177.pdfIn PDF document text
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608aa4cb84719---xatisijurev.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_off0000dadd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDADD 15788 bytes
SHA-256: 39622b2febfedda2006f5d0756e13de059899364e04154b6dc696c43aa4c9bec
font_01_sfnt_off0001035f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1035F 11288 bytes
SHA-256: fa986b40b0408b6cdc0c963115e42750e4b48b102e32638f65d5c5dc64cc1b32
font_02_sfnt_off00011dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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