Malicious PDF — malware analysis report

Static analysis result for SHA-256 025129d2e7beda6a…

MALICIOUS

PDF

78.5 KB Created: 2021-09-04 10:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 921a96a1446e223d181d5f941152da47 SHA-1: 706aac569b1c7f7b63efac2f8ceb33543145c9f8 SHA-256: 025129d2e7beda6a6b08096f744e272a3f4a1ae1989747c571e32a676543f962
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple external URLs hosted on potentially compromised websites or disposable domains. These links are likely intended to facilitate phishing attacks or lead to further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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 https://philabc.ru/uplcv?utm_term=mastering+bootstrap+4+pdf+download PDF link annotation
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/1611c889be75e9---22815031774.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/8e9jpajbtlsokvuq6hievnooan/lozokonerojifora.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/lafagilizarikediluxe.pdfIn PDF document text
    • https://ukdirectremovals.com/wp-content/plugins/super-forms/uploads/php/files/4e16129c76d752b1167f17f7b5fbc963/70268377692.pdfIn PDF document text
    • http://emeat.ru/var/files/90168244169.pdfIn PDF document text
    • http://eyupsifalibitkiler.com/resimler/files/37498332010.pdfIn PDF document text
    • http://chongthamnguoc.vn/img/files/93932023281.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/gopofiker.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/95e74c1d7c98e38abecc3c66e317086e/62548171872.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1609f533fdcc5e---vejagoke.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/ma4qbk0nl8eoph9gtscari6kmv/datuxivaloxapis.pdfIn PDF document text
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/fm4f12f61s4k0cmmf82vlb0n3v/78541214928.pdfIn PDF document text
    • https://thucphamtruongxanh.com/Upload/files/84100457588.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160c004bbae759---somul.pdfIn PDF document text
    • http://floral-design-lindgens.de/userfiles/file/jemuz.pdfIn PDF document text
    • http://futuralagoparking.eu/userfiles/files/9610174273.pdfIn PDF document text
    • https://highrise.pl/file/fibisegukemiw.pdfIn PDF document text
    • http://cgmorenanews.com.br/ckfinder/userfiles/files/16693753904.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2081506f49---parufujobal.pdfIn PDF document text
    • http://aristosaigonhotel.com/uploads/files/xojimekodeduzajisiwivapa.pdfIn PDF document text
    • http://aggengr.com/uploads/CMS/file/43654462922.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/rg6q38k4u2pg2ma1ilacbh17t4/geguxin.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c779db30b31---15805424037.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082ff8136e77---worigonefilegawavu.pdfIn PDF document text
    • 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_off0000cf5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e76f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE76F 16744 bytes
SHA-256: a9e63f667256c90fa5780381bc738469af60dd0843c36473512b64d3fc64b4e6
font_02_sfnt_off000112bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112BD 10968 bytes
SHA-256: ff464495052411423fe474c65fa8c889a0f2a2631d2332427d493221ecaab068

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