Malicious PDF — malware analysis report

Static analysis result for SHA-256 532dc24a07ce1e79…

MALICIOUS

PDF

89.7 KB Created: 2021-07-24 04:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 1590e6bf9e9729d3c2f2ee08c9304071 SHA-1: b072bd5dc47288147a223c7fa2ea9ef8e86ddb32 SHA-256: 532dc24a07ce1e79560d8f75b760aff41d7dfd133cf841d7aec551379159d177
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of numerous links on disposable hosting and compromised CMS uploads reinforces the malicious nature of this document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/gbc3r2sdhec5q4o630t1blaodl/30617761141.pdf In PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/mrkp7nlsqgl27g91d7f1p3aj25/41611352354.pdfIn PDF document text
    • http://aloisiquadri.it/userfiles/files/givakebekasi.pdfIn PDF document text
    • https://www.indoorclub-informa.com/boletines/img/file/manir.pdfIn PDF document text
    • https://mbamantra.com/ci/userfiles/files/41579545611.pdfIn PDF document text
    • https://terravistahometeam.com/wp-content/plugins/super-forms/uploads/php/files/b1e6a3139d8a7697355f560951b1237d/69153718667.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/1a94bddf8b812078ad128b74e162b47c/livujasepoberi.pdfIn PDF document text
    • http://staractivecollection.com/resimler/site/files/mekodekarakoba.pdfIn PDF document text
    • https://unosms.us/userfiles/file/11334500083.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/8d3ed18bf939b6020568f5806be32497/majujojorubin.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/160abf1a2ce6f1---rapogegozemafokagigikut.pdfIn PDF document text
    • http://libertyquad72.fr/userfiles/file/rufuzurojevibopozele.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/ab8b8d3378f321e84f4766412f07ea3f/56848285712.pdfIn PDF document text
    • http://evergladesharvesting.com/ckfinder/userfiles/files/tuvafawomimizoxuv.pdfIn PDF document text
    • https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/a7b9db8d0c2bc25ee831955cf6dd397d/45606407424.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1609be0f2ea0e9---suziniwuronedivoduzaj.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/c79a4587900dc2ed8cd0949f095b1217/53964012709.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/f7ctomemn0ri2bacq7tgn5j7qo/pinepapusafetakosakixiti.pdfIn PDF document text
    • http://2acontractor.it/images/file/xaguzo.pdfIn PDF document text
    • http://atut-biuro.com/uploaded/file/xasovefogodizobi.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1609e1d8c8e8ea---38389281632.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/2f06757ed61f6ea0c5d4abeb9c7f96bf/4634012580.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbd116e428---55576147535.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=eachine+e58+user+manual+downloadPDF 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_off0000fae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE6 11048 bytes
SHA-256: 440a4dc31530f6e967d1e00fd17d58904482793ce562f51a0a0295b6e1227e35
font_01_sfnt_off0001147a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1147A 17300 bytes
SHA-256: 81c97eb1ce850f722667405faf6af35e4d67f55bc264c3cf5f21ae909c2dfa06
font_02_sfnt_off0001418c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1418C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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