Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e19d2b99745abc…

MALICIOUS

PDF

90.0 KB Created: 2021-09-04 23:30:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 35768230d8cac229fc509055da3866d0 SHA-1: 1851619436554f625b39fbf00d5fa30fa8ac1901 SHA-256: 68e19d2b99745abc1e6c668096047c75b8559de65bdcc46a99bfabe5a00ba5bb
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm with numerous URLs pointing to potentially compromised websites, suggesting an attempt to lure users to malicious content. ClamAV detection and ML classification strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://mangonebike.com/uploads/file/pujunipasu.pdf In PDF document text
    • https://www.pepinieres-gey.fr/ckfinder/userfiles/files/69420462924.pdfIn PDF document text
    • http://archi1919.com/smlclub-files/file/66160257064.pdfIn PDF document text
    • https://wfbulgaria.com/uploads/wysiwyg/files/22017680884.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160c06c5cd6627---ribuxunumi.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/jeleredejevosokova.pdfIn PDF document text
    • http://haenuri.net/ckupload/files/9670645515.pdfIn PDF document text
    • https://pankalconstructora.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609647cb40916---99984190949.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aab0f42043b---85596531961.pdfIn PDF document text
    • http://talleresjpg.es/img/file/27991565302.pdfIn PDF document text
    • http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a0e787217---rejekunexagafujejav.pdfIn PDF document text
    • http://mundori.com/js/ckfinder/userfiles/files/77179959091.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610ac6a782746---noxexeludafuni.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bcea90b90b0---rasipufogeliwezi.pdfIn PDF document text
    • http://www.schule.havonix.com/ckfinder/userfiles/files/sivizajaxugesivadaxokuz.pdfIn PDF document text
    • http://neodev.space/wp-content/plugins/formcraft/file-upload/server/content/files/1609f67f29c779---80947856729.pdfIn PDF document text
    • http://kaizousha.com/js/upload/files/75064917365.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/7sr86p65sbt6unklsqohe2o6a1/pifasopupilemit.pdfIn PDF document text
    • http://d4squebec.com/clients/f/f5/f58105ca183540932673f5bf18e62671/File/xisunuremunub.pdfIn PDF document text
    • https://orcasproje.com/userfiles/file/31447677608.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/23a2a19057c746a6f188b7611468ac63/zikixivazarosasido.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=optimization+technique+in+pharmaceutical+formulation+pdfPDF 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_off0000f96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96E 11048 bytes
SHA-256: eb814f3a2c8ad68edef781492b8ca74519006fc335befbba517a0818db215045
font_01_sfnt_off000112b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112B8 18228 bytes
SHA-256: fccd7c8d56c62cc06dd325dc2afb408d5c4bc02d3b8fc2b2a5a0352875252228
font_02_sfnt_off000141dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x141DC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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