Malicious PDF — malware analysis report

Static analysis result for SHA-256 2acd0f26f234c6f7…

MALICIOUS

PDF

104.6 KB Created: 2021-05-25 02:41:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: c809ab30b85ee2429b4186c78d9561e0 SHA-1: 4902716ba03cafef33f20245adbcf19a9ab2715f SHA-256: 2acd0f26f234c6f7ad565c36070ea8ec88a540a5ae6887b310edf180f48c27ba
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. It contains a link farm with numerous URLs hosted on compromised WordPress sites and disposable domains, suggesting an attempt to redirect users to malicious content. The document body is heavily obfuscated and appears to be junk data, but the presence of external URIs and link farm heuristics strongly indicates a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://www.pietri-automobiles.com/wp-content/plugins/super-forms/uploads/php/files/7hg55bm1ssntd96n5oc9hjjbs3/15116296670.pdf In PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/b80629706950b75291246a094db68167/sorimoxulojitup.pdfIn PDF document text
    • https://sygimportaciones.com/wp-content/plugins/super-forms/uploads/php/files/2c2dbc265h98bpfq62fkfdpe3r/32221055021.pdfIn PDF document text
    • https://aspirans.com/files/file/xexopuvegeruxagenu.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/ppr6p8vvg6c27ldb02sc7tppk5/mazelonixolijupojiw.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160794998a1158---xavusoberulalis.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1607c54234184e---12523999097.pdfIn PDF document text
    • http://dush-kz.ru/uploads/fck/file/58530193434.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/vepozefatabat.pdfIn PDF document text
    • https://susta.vn/userfiles/file/gefizusiretot.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/87565309463.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/kblpb7shteki9bs6ee5ftvfrrp/fuvarelufutubupukizir.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab08dfa3723---sulovikonafuj.pdfIn PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/tc31e2k1833n858elmco8gm0v1/8258943105.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160827eaf022e6---vutiguxejelex.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/550505ff474d88a5c4ab9632a9e72745/94223208317.pdfIn PDF document text
    • http://martom24.pl/martom/userfiles/file/lowisuvasizaraxajatowow.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=fortnite+cryptogram+answersPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014e96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E96 5156 bytes
SHA-256: cfd67cb455a17b7cc0c763b58e1619760e0971c76060375a52f93b0023ebc770
font_01_sfnt_off0001601f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1601F 11536 bytes
SHA-256: 56875a7556350ea18ff70d4c3614c956fbddbe80430f848740d383836f249f5e
font_02_sfnt_off00018735.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18735 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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