Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2a58a59db5745d2…

MALICIOUS

PDF

79.8 KB Created: 2021-07-18 22:29:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: ef47339364a598960e1a3b2bb5de5423 SHA-1: 1e7cc4b4e0f677627f76ab4bc9be213a9087f60b SHA-256: e2a58a59db5745d2cb3bdaa564772cfcc9a7316760e3d055c942e9e4fa3791ab
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains numerous links pointing to compromised CMS upload storage and disposable hosting, indicating a link farm designed to redirect users to malicious sites. The presence of multiple compromised domains suggests an attempt to distribute phishing content or malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://a-swiss.com/upload/userfiles/file/77513357930.pdf In PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094caa125484---57130160813.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/19407331260.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16070eb76523e8---potavuv.pdfIn PDF document text
    • https://c4ir.ae/wp-content/plugins/super-forms/uploads/php/files/d54s9rpvd7bnmc23ae3avsamv4/fisem.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac570903f02---49445848144.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce68d72dab---67360683565.pdfIn PDF document text
    • https://wsbtitan.com/images/file/24532096790.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/1743570305.pdfIn PDF document text
    • https://hotelristorantenovecento.it/wp-content/plugins/super-forms/uploads/php/files/faa639d8cbde63e467e1dc31bd873f2a/lekevugaludizajeselile.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af8c35417e---guzovomig.pdfIn PDF document text
    • http://skoleniridicu-online.eu/ckfinder/userfiles/files/89127758809.pdfIn PDF document text
    • https://infravoip.com/wp-content/plugins/super-forms/uploads/php/files/43c192ba03147b99ffcd421426d5d255/94985831363.pdfIn PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/6cucvs106h8irq2o0jj96u236m/rixebodusekoxexotajonuwak.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf35e3ee32---48491792820.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16084aa77cf07e---jekidefanizi.pdfIn PDF document text
    • http://khamtribacninh.com/images/files/fukebutewulukewum.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/75391565306.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/70f814294b659730ecc244e28356a392/mizazubom.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/60599465286.pdfIn PDF document text
    • http://zoncmswebsitebeheer.nl/files/editor/file/414500569.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/285b6925441f3b558cc09e6e400e346a/kudisovopupun.pdfIn PDF document text
    • https://bloomland.com/sites/bloomland.com/files/kuvipevudanulozape.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/65c8027309974881be5e500ed8e20f8f/42587673765.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/c57bvfqomqjiki4o0gl25uqkm1/30879156843.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=astron+rs+20a+manualPDF link annotation
    • 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_off0000cd3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e54e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54E 21812 bytes
SHA-256: 5dc54457ade85731697371a5e984ac41f6a891683296b3bfc3cb26705c3e3ef7
font_02_sfnt_off00011a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A6A 10368 bytes
SHA-256: 9cbc7b1bbb352d74f09b97b969916913feeea00492dbde24f8ebef14bd45cb8c

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