Malicious PDF — malware analysis report

Static analysis result for SHA-256 3eacd36d2c182129…

MALICIOUS

PDF

89.2 KB Created: 2021-09-17 10:28:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b1a88b8671caf9286dd952133daf94e8 SHA-1: c2720a541beff5f525145d52086561e44f12ceb5 SHA-256: 3eacd36d2c1821294deb289d54e595582c1bb32b6b5f44566b319e4c97f0a9d6
172 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. The presence of embedded JavaScript and numerous external URIs, many hosted on compromised CMS uploads and disposable domains, suggests the document is designed to redirect users to malicious content or download further payloads. The heuristic 'SE_URGENCY_LURE' further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://garglob.ru/uplcv?utm_term=manga+reader+offline+app PDF link annotation
    • http://taispacedesign.com/upload/files/52139309108.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/50447273442.pdfIn PDF document text
    • http://alconsprom.ru/ckfinder/userfiles/files/fibatakowexaxekimavibi.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/66bt0dqeo2omqmudlg20pe5j2g/17255315699.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137ad138ea37---98497074456.pdfIn PDF document text
    • http://gildiamasterov.ru/userfiles/file/xisosivefig.pdfIn PDF document text
    • http://bronnicy.inhome360.ru/admin/ckfinder/userfiles/files/dirofiregevilo.pdfIn PDF document text
    • http://burningspearmarketplace.com/js/ckfinder/userfiles/files/kafaba.pdfIn PDF document text
    • http://tindangnhadat.vn/upload/files/40798930441.pdfIn PDF document text
    • https://gadd-asso.org/userfiles/file/xonatorew.pdfIn PDF document text
    • https://lordoptika.hu/files/files/pobonawunoxixeragus.pdfIn PDF document text
    • http://suamanhinhlcd.net/userfiles/file/sotulibexoloten.pdfIn PDF document text
    • https://yingzhaoliuart.com/upload/file/wimetutavuz.pdfIn PDF document text
    • http://shtaket46.ru/page_edit/_samples/userfiles/files/84577000416.pdfIn PDF document text
    • http://zezoalza.com/ckupload/files/50201171330.pdfIn PDF document text
    • https://newsale.linyn.mobi/upload/ckeditor/pages/files/22528011774.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16130b3de9f3f3---48157880596.pdfIn PDF document text
    • https://voziky-paletove.cz/mctree.cz/pictures/other/files/44857017677.pdfIn PDF document text
    • http://happyhanool.com/ckupload/files/20271478716.pdfIn PDF document text
    • http://sieuthihatgiong.vn/webroot/img/files/1122133405.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613767598b00b---nafozigumad.pdfIn PDF document text
    • https://satyawatioverseas.com/userfiles/file/87848666448.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/37082288932.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130ee3fcb868---nuwek.pdfIn PDF document text
    • http://vidol.eu/userfiles/file/doruwaxofa.pdfIn PDF document text
    • 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_off0000f785.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF785 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010f97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F97 18148 bytes
SHA-256: 9f6c87a5a78af28cc140e1b54c3f65cbefdd4642aa6210cc0b8474209511b87d
font_02_sfnt_off00013f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F8F 10400 bytes
SHA-256: bc9106bcf65af0ae3830e62cf0292726d870fa1509deabe09bfeec6e1790cf10

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