Malicious PDF — malware analysis report

Static analysis result for SHA-256 beafd4363f070695…

MALICIOUS

PDF

271.1 KB Created: 2021-07-08 06:42:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: d48d21e5e28c85e91751781261edff7d SHA-1: 2f0be2f978a0c48480418b89ffc12f91f2ac1dfc SHA-256: beafd4363f0706953096bb2f405e1c2ef4d959bec43dd07062ae19ad85a65c0c
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links pointing to compromised WordPress sites and SEO redirectors, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards a malicious document designed to trick users into navigating to potentially harmful external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://laborke.ru/uplcv?utm_term=peace+in+the+old+testament PDF link annotation
    • https://www.lightingsolutionsinc.net/wp-content/plugins/super-forms/uploads/php/files/4ebb40443e0481d031a3f04f41be7cfc/tuwizewewemosebawexidulel.pdfIn PDF document text
    • http://banhangcongnghe.com/upload/FCK/file/97534575357.pdfIn PDF document text
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608da2b83b82b---xamefi.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/523dk81009f5tceap5jnue0bns/vonevijaw.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608059b48cdb3---mevudilaxonudo.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082adeaae14f---xijerojesujoratederuf.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/bfa03f23314df86ea80f2e9a9abbb781/43467557790.pdfIn PDF document text
    • https://viratrip.com/basefile/travelasreviracom/files/69635345519.pdfIn PDF document text
    • https://mertlakustika.cz/images/pages/file/bepesexerujaxiz.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/bc27b16f6eb19c50a78bfa9072c0192e/13183070822.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/xotaf.pdfIn PDF document text
    • https://nabijdefossa.nl/upload/files/56150959386.pdfIn PDF document text
    • https://wagaskar.com/media/83740799034.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609bcb829fc58---58683193546.pdfIn PDF document text
    • http://mvhs1964.com/clients/2/20/2030ff4f331b14c2016b95997514b7ac/File/49393719512.pdfIn PDF document text
    • https://kingdomofgodmn.org/userfiles/files/90712016850.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607b831ad957d---54227024011.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/8ie7csm30ar0jt4r1hcleq2cr1/wilix.pdfIn PDF document text
    • http://guchenes.com/d/files/33232008827.pdfIn PDF document text
    • http://solartgaleria.hu/images/file/1572103523.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/fec04b2b983bbba280289a082118317c/wosodadakojipimib.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c5856a6a0de---logavamopuli.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_off0003cefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3CEFC 17660 bytes
SHA-256: 4541310ee6150f29f0d29aa39648d239543605cea01ec1e85b9795583710d050
font_01_sfnt_off0003fcba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3FCBA 10536 bytes
SHA-256: 8a0ef36ffe2f5caa30d692869872234321a93edc13113e063ddf6c0df831437d
font_02_sfnt_off0004147e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4147E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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