Malicious PDF — malware analysis report

Static analysis result for SHA-256 207a049a7c978e7a…

MALICIOUS

PDF

82.3 KB Created: 2021-09-12 20:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 6449cd7a7a93d11b29aeb90c5b625e55 SHA-1: e6c0b4493ff0428d5827c80841668a86395d7a58 SHA-256: 207a049a7c978e7a4ff1c197fb5d59aa5c1206c31afb8f036adee28d14ecd575
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The presence of links like 'batman game apk' further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://sandalyecenneti.com/wp-content/plugins/super-forms/uploads/php/files/clv9scj3r5905abjhghggm6el8/55287935718.pdf In PDF document text
    • https://whiteplacard.com/UserFiles/file/dulovafizinut.pdfIn PDF document text
    • http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16136561fb8f3d---dovedu.pdfIn PDF document text
    • http://usatovl.ru/upload/fckeditorfile/20189543442.pdfIn PDF document text
    • http://kleni.cz/userfiles/file/kuwemovetijopudububixa.pdfIn PDF document text
    • http://alptw.com/images/files/wigexezisixivowav.pdfIn PDF document text
    • http://easternhoteljeju.com/FileData/ckfinder/files/20210907_D44B97B64CE1CCED.pdfIn PDF document text
    • https://at1-turbo-j3t.com/contents/files/xuwojovofupigavom.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d656aed40f---31517674985.pdfIn PDF document text
    • https://vietnaminsight.biz/ckfinder/userfiles/files/zoginap.pdfIn PDF document text
    • http://connect-event.fr/ckfinder/userfiles/files/mowasaxumojun.pdfIn PDF document text
    • https://banerjeetourspecial.in/ckfinder/userfiles/files/nirowovolupuwikuk.pdfIn PDF document text
    • https://www.playitdirect.ca/ckfinder/uploadfiles/files/37659193372.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/f2f6a395a92dc3646eed8067ae501a3b/vovuviwakodunipijuzonu.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/edc404fc8d77b8d4422a3689dc211cc8/fejosulanuwenavawutasofe.pdfIn PDF document text
    • http://jrecchina.com/ckeditor/ckfinder/userfiles/files/tegavaxi.pdfIn PDF document text
    • http://kalkulacka-hypo.cz/userfiles/files/ruregekud.pdfIn PDF document text
    • http://tnslib.tools/userfiles/files/forejifuzurinivejegod.pdfIn PDF document text
    • http://christopherdallo.com/file/xuwemidiragetigita.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139a18b27c38---mozuzet.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a7909c2769---nizapemopovadoli.pdfIn PDF document text
    • http://hotel-gerard-dalsace.com/upload/document/tuwozejokubibosu.pdfIn PDF document text
    • https://hotelmitrutarija.com/uploaded/files/14548039475.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=batman+game+apkPDF 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_off0000df41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF41 10212 bytes
SHA-256: 9a82101b03b506d09d5b1183b5ea05751387fafe1a201b5eb1d01eb5e8099690
font_01_sfnt_off0000f62a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62A 17624 bytes
SHA-256: 48252612bd1bec6c4c02666f2e286b6db29fa21a911883bf61272c2f4aadf080
font_02_sfnt_off000123c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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