Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba20f572c6689c8d…

MALICIOUS

PDF

84.8 KB Created: 2021-07-08 18:27:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b1e86a9627ee07f9cc8921b8b76e2411 SHA-1: 507286f6f002e20d054c843d7791893663b9ffea SHA-256: ba20f572c6689c8d11dd334ead80cfeeaadfac21efbe236e86e9c124c31278f4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links indicates an attempt to direct users to external resources, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 http://sylvianapoles.com/clients/e/e6/e63d90d46a840f0b3195f531cec11f6e/File/34234410812.pdf
    • http://maydangson.com/vietkiendo/upload/file/84201916457.pdf
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3ea5e68266---mamotakegudarerutiran.pdf
    • https://dafelia.com/files/54647874039.pdf
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607da9c8bbd96---26201232612.pdf
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/bbvuba1csdc926s6c0jjs8g9d0/wigafasatoxaxe.pdf
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160740da14aaac---35207841610.pdf
    • http://ophtalmic-overnight.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c80c3e7afa---19104866097.pdf
    • http://albino-pitti.com/pub_img/file/7676222900.pdf
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/ghvpmqv9r0s1c9ieafnij3ibl2/53959442970.pdf
    • http://vodnik48.ru/content/file/49968186692.pdf
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/de5c974e415948ddcc01f9f262e80fcb/wunadotozam.pdf
    • https://creativitagh.com/pevron/www/img/file/nedebawowi.pdf
    • http://jyotiacademicpress.org/uploads/file/98176828313.pdf
    • https://tortugafilms.ca/adminfiles/file/784204117.pdf
    • http://helloshoppingnepal.com/userfiles/file/75117370881.pdf
    • https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/f60c07f850ec3a0a9a0155210e167a9b/39231206234.pdf
    • http://border-inn.com/CKEdit/upload/files/2489085861.pdf
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/29293158473.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae6e1183bca---1049477665.pdf
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/26a7153187cfbef4ffca27fd3195bb5d/zobuwexewewelux.pdf
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/59a2cd6b809f5fcddcbbe8a9673cafa5/bapisixipogijirikogofaw.pdf
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/tj0cjb551r7abkk00mf7ckv3no/kujabemekukeli.pdf
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b498640d498---24313112200.pdf
    • https://shoppingplanet.ro/ckfinder/userfiles/files/ralejululufepitaxaf.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=started+loving+you+again
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e956.bin
fa66784693543e07c5158368efd3145ca1248b55545f3269ce03f6fb0db548fb
pdf-font-stream PDF embedded font (sfnt) at offset 0xE956 17188 bytes
font_01_sfnt_off000115e8.bin
6b1f8cbe10a156002e29d3e3813e687ed239e2b59efd60dc0da6cec2e27655eb
pdf-font-stream PDF embedded font (sfnt) at offset 0x115E8 10612 bytes
font_02_sfnt_off00012e17.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12E17 16792 bytes