Malicious PDF — malware analysis report

Static analysis result for SHA-256 884c1ef2d6a72872…

MALICIOUS

PDF

71.2 KB Created: 2021-08-30 03:26:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: c8b55248a9e98f92a6936dbbd29baddd SHA-1: 961417bd61f30a387e6b05bd2bd06ebbc1210744 SHA-256: 884c1ef2d6a72872be3984a7bc0b4b16618cc0dc5dfb89eaca988e9eecb92ab8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The embedded JavaScript likely facilitates the redirection or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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.
  • 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://generaldistco.com/images/file/95092162203.pdf In PDF document text
    • http://adance0112.com/upfile/editor/file/difubivefikevidafirev.pdfIn PDF document text
    • http://tsutae-f.com/js/upload/files/87848431102.pdfIn PDF document text
    • https://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/16097d698095cd---21296223764.pdfIn PDF document text
    • https://marugame.hk/editor_upload/file/timifelipewejujol.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c208f56514---segajudovemiguxikiluje.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/9aa11daa73efa592a09f2df560ea86b0/74340195498.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096677379a56---pibibaluzaloperatonunasum.pdfIn PDF document text
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8a7195b2bb---titusawejukowurusireji.pdfIn PDF document text
    • http://luxcottage.ru/stroykamen/userfiles/file/nogefiratobixi.pdfIn PDF document text
    • https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/ac819b8c1fd18a39c06105911f7aa8a4/pefatijojozidozit.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607d7bb39338f---63940460074.pdfIn PDF document text
    • http://shukokai-voves.fr/userfiles/file/30517733232.pdfIn PDF document text
    • https://leo.tw/upload/ckeditor/files/febubudemopororos.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/8efd5628b5b0272db3cf71371640f794/rataduwogujik.pdfIn PDF document text
    • https://adasms.fr/userfiles/file/84213301738.pdfIn PDF document text
    • http://sun-green.eu/ckfinder/userfiles/files/wenidasizat.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/jigepufegiwozujufakutil.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/87084576183.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb8cad488d---rozixonog.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160903d3c006b0---58186713517.pdfIn PDF document text
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac057ad99ff---nusavozidepawedako.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=signal+transduction+lecture+notesPDF 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_off0000b97f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB97F 14524 bytes
SHA-256: ba4795ddbb966bdb8781a906d37320da1cc3b798532db1b7c3b8503ea987bfbd
font_01_sfnt_off0000dda4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f5bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BB 10720 bytes
SHA-256: 74164db4a2a4271a94dab3203052d118837b045dc44480c587e9d5e59b2ecfea

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