Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed67a1f4076e592b…

MALICIOUS

PDF

82.9 KB Created: 2021-09-22 14:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 5e0284f4b236b4de31d952f2ca2621bc SHA-1: 3911fe9550a7d0572c75463c3fcef32280ab548a SHA-256: ed67a1f4076e592b12cb72608b3b160f0ed18136683e4268fe6bdd1789e98441
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier as malicious. It contains a link farm pointing to various domains, some of which are hosted on compromised CMS upload storage or disposable hosting. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates the document likely instructs the user to open a password-protected archive, a common tactic to evade gateway scanning. No scripts were extracted, but the presence of multiple external links suggests a downloader or phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://www.poliklinika-hb.cz/userfiles/file/97796500655.pdf In PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/a1ad89fc7408b17a766dd65dbf2d8ae3/5035788591.pdfIn PDF document text
    • http://nutrizionisti.eu/public/thread/risorse/file/61386043604.pdfIn PDF document text
    • http://privateeducation.sg/verzsape/demo/upload/admin/files/10550532630.pdfIn PDF document text
    • http://fotofolliasanlazzaro.it/userfiles/files/romowasirageve.pdfIn PDF document text
    • http://reichspfarrer.sk/file/17494325694.pdfIn PDF document text
    • http://lawyergz.net/uploadfile/files/35638715081.pdfIn PDF document text
    • https://bulendengin.com/upload/ckfinder/files/66994265208.pdfIn PDF document text
    • https://cowik.pl/upload/32327673203.pdfIn PDF document text
    • https://euroquimicadistribucion.com/zabaleta/data/imagenes_contenidos/file/fodejitukerojejujedasisi.pdfIn PDF document text
    • https://rmp-familienanzeigen.de/cms/files/riwopo.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ad55629fe6---23866422797.pdfIn PDF document text
    • http://mextro.de/upload/files/14915761812.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/lunaz.pdfIn PDF document text
    • http://hoangminhceramics.com/app/webroot/uploads/files/fomepejamugigaxi.pdfIn PDF document text
    • https://alebusph.centralcms.cloud/galeria/files/93544231174.pdfIn PDF document text
    • http://sabaispa.net/userfiles/file/joriboboniwijetadeki.pdfIn PDF document text
    • https://voolabs.com/wp-content/plugins/formcraft/file-upload/server/content/files/161409d7c65225---metog.pdfIn PDF document text
    • http://eclickapps.in/userfiles/files/33512109217.pdfIn PDF document text
    • https://aromamarketing.md/img/files/buwaputuxanemal.pdfIn PDF document text
    • http://amy-tsai.com/images_express/userfiles/files/mixitufarelozo.pdfIn PDF document text
    • http://www.sandipmallick.com/fckimages/file/87699437449.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/q0h10jig9n3bm2f4e0f5h9clqv/nutesefixukiwodevi.pdfIn PDF document text
    • http://hairtransplantmangalore.com/uploaded_files/userfiles/files/53030070982.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=app+cloner+premium+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_off0000e143.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE143 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95A 10440 bytes
SHA-256: 7ac0ad2f82992d1cb1bf4dd7626c76bd4207a2c2326d480367073c56aa03ff59
font_02_sfnt_off000110fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110FE 17288 bytes
SHA-256: ee34145b512f729ca4c39dd3736f25ce4ec269d6a48ec7114886e6d5f0fafdb2

Open this report in the interactive analyzer, or submit your own file for analysis.