Malicious PDF — malware analysis report

Static analysis result for SHA-256 680f65ed11fb1632…

MALICIOUS

PDF

88.9 KB Created: 2021-07-17 11:30:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: b0d1f77a795bbff935bb4a633732c7fb SHA-1: 66127dd4f6a0f937c94ac100ec660d786ca7445b SHA-256: 680f65ed11fb16323dff95543f43f3c4691293e564406855ab73eb515daf5de5
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

This PDF document exhibits characteristics of a phishing or malware delivery attempt, indicated by the 'Fake CAPTCHA' heuristic and numerous links to potentially compromised websites. The ML classifier strongly flags this PDF as malicious, and ClamAV confirms it as a 'Pdf.Phishing.Trojan'. The document likely aims to deceive users into interacting with a fake verification prompt, which could lead to the download of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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://otczenacts.com/media/files/4774728562.pdf In PDF document text
    • https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/d4224ae78e0a1ff3f32f33ba25abbdbb/90223743362.pdfIn PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/1607bee6b45e24---mefemosoz.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608baa66c32db---soliludisofezumux.pdfIn PDF document text
    • http://fautographie.org/images/userfiles/files/72160907425.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd3bffca955---jipopudebokesisu.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607befd0e7626---62491893720.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/ce2emqeravo09qst841md5eclk/vodewepojakijidovojive.pdfIn PDF document text
    • https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/4347ee70addd17e6fafc9172a7dfabf3/pewuwawemopabebizeg.pdfIn PDF document text
    • http://www.apsetedavisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bd6e478b73---36343486601.pdfIn PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082889c7eb4b---mumigugegunopin.pdfIn PDF document text
    • http://bobiniauto.com/userfiles/file/10018061063.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fdf4ee46a9---wakavevol.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16073366f7967d---87006278716.pdfIn PDF document text
    • https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcf30d1100---guxegize.pdfIn PDF document text
    • https://rrr71.ru/upload_picture/jivemitewabikisukubalabe.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/7ba12acc0b88dd57e6778c919c825121/nelisajijofej.pdfIn PDF document text
    • http://elfuklid.cz/foto/Image/file/bekajejijofuvuseto.pdfIn PDF document text
    • https://foreningenflex.se/anvandarbilder/173/files/lolupipatolunowo.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160f265832ee16---98815022539.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/r2oi33ggn9hm717a6l9o196hq0/wanakifegil.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/3408770365.pdfIn PDF document text
    • https://nolimitscenter.be/peausitive/images/FCKeditor/file/mexibatasajobegomoxo.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/000a7e0a89d258d4c7314145e3f4ce2d/75047801612.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=lucky+patcher+old+versionPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f790.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF790 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010fa7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FA7 10940 bytes
SHA-256: 9e61062209d2fd2c135232b1ffdf855fe334e72ae3a10973a24a435052da475f
font_02_sfnt_off00012908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12908 17464 bytes
SHA-256: 11d32bc068e2064350b4e2cdcaa73f61338b0a45b77b0a7680fddf19decf5cfc

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