Malicious PDF — malware analysis report

Static analysis result for SHA-256 314e161203398f18…

MALICIOUS

PDF

96.5 KB Created: 2021-07-06 01:03:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: ee4e7b955f20dc387cf83ed874ed02f4 SHA-1: b62db174bb6f71e7cea526cd14084ee5f7c3bafb SHA-256: 314e161203398f18a4c59a509f1537072b49352a2b0e5a535756f74748b712dd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to potentially compromised WordPress sites, likely serving as a distribution point for further malicious content. The presence of external URI heuristics and link farm detection rules supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://olmitek.by/wp-content/plugins/super-forms/uploads/php/files/mtudepgsm6sgl2oats9a64dfc1/tolugagujixonokalezizafol.pdf In PDF document text
    • http://www.expo-hotel.com/english/wp-content/plugins/formcraft/file-upload/server/content/files/16077e31914cf8---30011591320.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089ef6aaea3e---fobesexatodup.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160abcc35ed001---99311248160.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d28708f423---80161698311.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/f0779d553547ed9348f0ab1bc31ca40f/wuzuvasukepukevuso.pdfIn PDF document text
    • http://uyaviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af7a66cef14---98189516752.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/wevolumefageseja.pdfIn PDF document text
    • http://kokocurry.gm/userfiles/file/74986280581.pdfIn PDF document text
    • https://expresstestingatl.com/wp-content/plugins/super-forms/uploads/php/files/34317cff597f017ae5f8082516382043/xazogorofalexuvunajofixi.pdfIn PDF document text
    • https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/kv98fhb00am5esfgidmmd0nroe/gomosimigazefowur.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfb8c65f7da---movogejafekiwuvizut.pdfIn PDF document text
    • https://braindevelopmentmaps.org/userfiles/files/zapafidoropijap.pdfIn PDF document text
    • https://proartgaleria.hu/files/files/73696819483.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/461e70632562bac1d37957af96013852/gelikivisisimeluxujilig.pdfIn PDF document text
    • http://songiadabinhphuoc.com/upload/ck/files/81163798520.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/45095104323.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/qdb04640e3u1nb24es59bdotm4/jemuzenigogudonexele.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f773225bf---zokeliputelowixawe.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/28c5b163e5de1e90c245e10a5a6af7ae/27125879743.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160de11c3c0036---zegav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=class+9+maths+chapter+6+extra+questions+with+solutionsPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA92 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102A3 16088 bytes
SHA-256: 450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c
font_02_sfnt_off000117d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117D9 11440 bytes
SHA-256: ea1f311a37f5fafa28ccf698c7b06a5cd50ad5fbcca24532a13a0dd498b5e708
font_03_sfnt_off000132af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132AF 17744 bytes
SHA-256: 50fcdc3834263433f8d75bc74d278c08ad2953254d81fb15f6411ef3ca20b6dd
font_04_sfnt_off00016127.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16127 8924 bytes
SHA-256: c2afe38b89c52b31e3bc6a84448e218cb17a7c329faa1782b7344e8c76fccbb0

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