Malicious PDF — malware analysis report

Static analysis result for SHA-256 49a433760981ac66…

MALICIOUS

PDF

119.6 KB Created: 2021-06-26 16:22:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 52b7c935bea085e18486d362c707233e SHA-1: c00f5cecd54f434f9e5ca6834fde1b1d83315916 SHA-256: 49a433760981ac6613c475d7633d889f9d0fafd8ee408656f4c49f20fa4c2278
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised websites, indicating an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a downloader or redirector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9719

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://anpheatingandac.com/nbloom/fckuploads/file/xiveb.pdf
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/qshjm5kk785hf449issn7v0r3j/42789821816.pdf
    • https://www.simplythebestevents.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16090538ea35c9---87002407161.pdf
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16073180378c6e---rulagemabagumenexev.pdf
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/a2e18a0f25630dbfa144ebb5237cb437/wapogowe.pdf
    • http://iglozawiercie.pl/zdjecia/file/55632733927.pdf
    • http://jerseybankruptcylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fejidawejunigenej.pdf
    • http://www.knickmeier.net/images/pageimg/file/36451659266.pdf
    • http://vhshf.de/File/64099871417.pdf
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/1df9455aa981a17fee6572573eab200e/gajote.pdf
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/krpqijc6g7c3bnk8e9sous6loj/26170533730.pdf
    • http://hoangle.vn/uploads/userfiles/file/lutolafipukimabo.pdf
    • http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/1606cedecaaf4c---28780258086.pdf
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9b942eace---41828253296.pdf
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606edbe7e4728---15376925240.pdf
    • https://datajournonepal.org/files/76709965613.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba38a8f47a---58533774639.pdf
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160815a5612a51---jemixax.pdf
    • https://ehlibeytalimleri.com/resimler/files/68751761226.pdf
    • https://foxtailmag.net/wp-content/plugins/super-forms/uploads/php/files/1b57315f93cad83dba333cf9d8eda218/4581971842.pdf
    • http://plenar.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608871d4ae8da---bufomowujolufabuwez.pdf
    • https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160776c80b478d---33431788128.pdf
    • https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/5e485e93329b2bb3409364a63db81c2e/68281593337.pdf
    • http://fygl.net/uploads/file/130955071363.pdf
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/12182920763.pdf
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160aa04a46f332---50664733626.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=juliet+sykes+before+i+fall
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00015793.bin
11c5a07d087146020572b41e3c25cf6f3fd7b709257038c787216a38c3b0495f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15793 16228 bytes
font_01_sfnt_off00016d7b.bin
9ab2420f0d1b7c4174fc8f572f424163a4f9a350f1bbde8f090f2e97bbb72ce3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16D7B 10540 bytes
font_02_sfnt_off000185be.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x185BE 16792 bytes
font_03_sfnt_off00019dd0.bin
a4eb405f2458279f1be99cc24f397be0c24a7275e23d2f700afd5cd6a2b56ade		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19DD0 20108 bytes

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