Malicious PDF — malware analysis report

Static analysis result for SHA-256 9749e424a5f70108…

MALICIOUS

PDF

81.3 KB Created: 2021-07-29 23:48:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 27fbb42064224ff9cda39876affff797 SHA-1: 89e67d2f6dc4b5f28b66b9b6cad8f41fca0ce0f8 SHA-256: 9749e424a5f701085ee5541aacbacde007fc6bb6f3f4f4af5dab6cc0fe2651cb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm or phishing lure. The presence of PDF-specific heuristics like 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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://nebovsem.ru/app/webroot/files/files/55041917860.pdf In PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/lofuluwuvuxir.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/8st12vie2nkcviid2r0aid8mnn/sewexiwozasutoxemusexenuj.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f706332d79---88695137354.pdfIn PDF document text
    • https://earthchartercities.org/wp-content/plugins/formcraft/file-upload/server/content/files/160840b853522a---64211853622.pdfIn PDF document text
    • https://caribemed.com/userfiles/file/gukeziluxozebuwamagoza.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/6e0479763cbeb3804c7dd9a9577e53c0.pdfIn PDF document text
    • https://camile.vn/wp-content/plugins/super-forms/uploads/php/files/ko5fscem7pkv66cn6g7no29ps1/84876238407.pdfIn PDF document text
    • https://turbooto.vn/upload/files/vawexipimidavudedix.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1cecd8a617---jonenabovebipan.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac587695697---geruzatomidorejit.pdfIn PDF document text
    • http://aokisuper.com/ckfinder/userfiles/files/zavopido.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/6068657232660819ca87753f25b856e0/vanopipono.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/jt287fk6sugip3djm63rdvts9j/vojijerabivunaji.pdfIn PDF document text
    • http://motorlustor.net/userfiles/file/30995640276.pdfIn PDF document text
    • https://netshopnepal.com/userfiles/file/molamoletononipo.pdfIn PDF document text
    • https://www.modianodesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607afc022b30c---jakubejizu.pdfIn PDF document text
    • https://www.properties-thassos.com/wp-content/plugins/super-forms/uploads/php/files/hdt6d5minuasnctjnpojr0tdd7/nateniguziso.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/8o8sd0r9rg414b0mmn81un1f7e/terisemagepereluvino.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfbc7122915---94523132944.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ef2fd052ad---jeditowus.pdfIn PDF document text
    • https://wills.sg/wp-content/plugins/super-forms/uploads/php/files/83c55fe0dd2686750cf4acc912e54aeb/98356325621.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/7212f1ce7724cad0e05b7fea9a660854/95577117236.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=washington+manual+of+medical+therapeutics+36th+edition+pdf+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_off0000d401.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD401 17132 bytes
SHA-256: 3b364dd9ac7530087bde3497d697d881f44008bf77adeccbb2bd96c175db4720
font_01_sfnt_off000100be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100BE 11584 bytes
SHA-256: b247f24b3e34d9299dd8a5a4296cdb88dacfe82193626fa527643ec62a2c2191
font_02_sfnt_off00011bed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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