Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c05cec1e20a4e11…

MALICIOUS

PDF

79.8 KB Created: 2021-09-09 20:34:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f4fc77fab6ff0b5240500bcf7e0d0c78 SHA-1: d6e4d4649dc0c47ee4dec9a388a8566e0a869f83 SHA-256: 1c05cec1e20a4e11f02a7111e563196fb97eb730ff161ccae261efd9e3a685b2
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://grupo-bahia-real-estate.com/ckfinder/userfiles/files/tepaxofavuvojete.pdf In PDF document text
    • https://mycocoa.org/images/upload/files/domigevozikaboriwolena.pdfIn PDF document text
    • http://www.fred-robin.com/ckfinder/userfiles/files/kejarugin.pdfIn PDF document text
    • https://vasutaszeneiskola.hu/ckfinder/userfiles/files/tiwofinapaputilus.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/dk96vuh60j8dpqdchq5nh2msm1/pobotevena.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9d4731fcc09017905caa9bf80027aa0a/lejejokowulavuvakepevufop.pdfIn PDF document text
    • https://syteq-pro.com/userfiles/file/baxukelumesuwebakiwom.pdfIn PDF document text
    • https://obermeyer-modemarkt.de/upload/file/kipopofazugu.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/36419055314.pdfIn PDF document text
    • http://dongshengcable.com/images/upload/File/xatubibubirojefa.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161300eeee3b7e---28844154035.pdfIn PDF document text
    • http://urbanelect.com/userfiles/file/64847825524.pdfIn PDF document text
    • http://ecole-belair.com/ecole/file/kovadafuwozuxajidebigojul.pdfIn PDF document text
    • http://lscapital.it/images/file/11295533202.pdfIn PDF document text
    • https://mwasafat.com/uploads/files/82580803302.pdfIn PDF document text
    • http://www.cuadernos.in/wp-content/plugins/formcraft/file-upload/server/content/files/161343b8a163c3---vupunukuruk.pdfIn PDF document text
    • http://girlstown.org/files/js/ckfinder/userfiles/files/66648376817.pdfIn PDF document text
    • http://saipanbooking.com/FileData/ckfinder/files/20210902_12927DC9055A4894.pdfIn PDF document text
    • http://allier-genealogie.org/File:/73996184613.pdfIn PDF document text
    • http://cuuhoatudong.com/upload/files/69351251813.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/1hapnqdo3hs48cp4qr3m3omaem/2986631326.pdfIn PDF document text
    • https://crownprolaw.cn/userfiles/Proj_Name/files/tuwepo.pdfIn PDF document text
    • https://ismet.com.br/ckfinder/userfiles/files/75298629300.pdfIn PDF document text
    • http://titusauto.hu/kepek/file/kodakesovur.pdfIn PDF document text
    • http://www.jobibon.com/admin/userfiles/file/xisufufawizitu.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/52301968934.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=gre+official+guide+3rd+edition+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_off0000d27f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD27F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA91 17496 bytes
SHA-256: 374ed6994d42b4cc9233762c426ad4faca2d76ba8ea8a7bf48bcc46347c531f5
font_02_sfnt_off00011813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11813 10940 bytes
SHA-256: 5cecff5755997fba08f1fc04cbc7700436070e2d7c4d769456d6d4c7250c2d7e

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