Malicious PDF — malware analysis report

Static analysis result for SHA-256 8946eee426798afb…

MALICIOUS

PDF

86.0 KB Created: 2021-07-16 19:46:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 534ed209ac8a28d33de37cf94b4a25c6 SHA-1: ab4e0734a7a71fbf8d2c09c0f243d8acf51f55a2 SHA-256: 8946eee426798afb0cc997b43ab613edf676f0a4555a80d6109d906e0e108174
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV confirming it as a phishing trojan. It contains a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting an attempt to redirect users to malicious sites. The ML_NYX_PDF_MALICIOUS heuristic indicates a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/92447e7d93ea1d3ca4cfed339589d745/71093114909.pdf In PDF document text
    • https://emauto.lv/index/images/up/file/53243917121.pdfIn PDF document text
    • http://tykhestudiodesigns.com/clients/7/73/7311521ca682816632878891c231d107/File/tejebixalujudizamenazuva.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca03669066---41348460711.pdfIn PDF document text
    • http://edilgroupdigiovanni.it/userfiles/files/79802594760.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/88671607872.pdfIn PDF document text
    • http://verduciautodemolizioni.it/userfiles/file/11823438502.pdfIn PDF document text
    • http://pk.mo/userfiles/file/59136961447.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/ba331047da84539d9d227640ac54c4e6/tegowi.pdfIn PDF document text
    • https://schmitz.cz/res/file/81890157651.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/9700fd77897df40396a8112fa9820dc7/9463589770.pdfIn PDF document text
    • http://skpizzasubs.com/uploads/files/38469984368.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3607d60c84---10632152604.pdfIn PDF document text
    • http://studio-rivetti.it/userfiles/files/27606015960.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a4e57420672---54797846470.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/38050492791.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/bujogogilufukorutirem.pdfIn PDF document text
    • http://canadanur.com/resimler/files/kegezosogepemupok.pdfIn PDF document text
    • https://benqmusicworkshop.com/fupload/file/23300604970.pdfIn PDF document text
    • https://egca.fr/userfiles/file/35457349493.pdfIn PDF document text
    • http://fonnepal.org/userfiles/file/67304888043.pdfIn PDF document text
    • http://moffatcountyhighschool65.com/clients/878592/File/xuvilivejaxep.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/qu9feabsj5rmu862g6ipdqecn0/37793448571.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/lofowotafuro.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=abbot+of+clunyPDF 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_off0000f06e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF06E 17220 bytes
SHA-256: ef20f350699a5e0de280a52b576bc72b64c444b7ace70317137b6d25aa073f91
font_01_sfnt_off00011c7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C7A 10012 bytes
SHA-256: 768b6823ef06699bcc63e723541716e15832eced596d77d43f697cc3aef81380
font_02_sfnt_off000132eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132EB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1