Malicious PDF — malware analysis report

Static analysis result for SHA-256 696f9af898d9f6de…

MALICIOUS

PDF

110.9 KB Created: 2021-07-22 14:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8513a733d212a638b730b43385dda3df SHA-1: 08e3c7f6f7e01f72b5e95ca99e2e4c9656fecae7 SHA-256: 696f9af898d9f6def85edbad87c2bba1646dd30cc2adf8144a2b40fef370c185
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript, which is often used to redirect users to malicious websites. The heuristics indicate a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to obscure the final malicious destination. ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely involving phishing or the delivery of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://chaletsuenodesol.de/files/leraxo.pdf In PDF document text
    • http://coffee33.ru/archive/file/fimimavawulujulo.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/b78eea7abd79eb8d1868b0e3e4362918/35583081879.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/jofujerezivotafuw.pdfIn PDF document text
    • http://uforoi.com/app/webroot/uploads/files/60608960956.pdfIn PDF document text
    • http://tjclassof1971.com/clients/1/16/169b02496b2253913efe31a5b05f4f66/File/23288786378.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/87583431532.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/2c4rsc3io7fu9pst6d4dti267b/zomapegetavofog.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/6vr4915seo8o1cp70k0hll7p1k/diman.pdfIn PDF document text
    • https://tripleccompanies.com/wp-content/plugins/super-forms/uploads/php/files/960bfa728df05d6db1dc26d2b4b0eac6/zokones.pdfIn PDF document text
    • https://yodobashi-church.com/vosakatimidojulibegizofe.pdfIn PDF document text
    • https://digireg.com/upload/69129589405.pdfIn PDF document text
    • http://arunimaflavours.com/userfiles/file/20058423613.pdfIn PDF document text
    • https://refour.eu/wp-content/plugins/super-forms/uploads/php/files/2b9983363f02ad7a9b7a44fe3db32631/99415900646.pdfIn PDF document text
    • http://digimaap.com/wp-content/plugins/super-forms/uploads/php/files/r0pcvdc4b1962eucpqh6u7fhfp/34128641865.pdfIn PDF document text
    • http://sahamit.net/userfiles/file/wigemipopanitoruwimolasa.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/jevosaf.pdfIn PDF document text
    • http://odpadykj.cz/UserFiles/File/dukekekatetemususifu.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607e420bf3a79---44151879341.pdfIn PDF document text
    • http://homenet-spb.ru/userfiles/file/83509585946.pdfIn PDF document text
    • https://bursac.net/userfiles/file/56393624737.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a5b0bd65208---24951135707.pdfIn PDF document text
    • https://postele-z-masivu.sk/ckfinder/userfiles/files/xidozawufobakiluludule.pdfIn PDF document text
    • http://apvn.info/userfiles/file/8489745092.pdfIn PDF document text
    • http://ankaser.com/userfiles/file/mowusag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=eating+makes+me+hungrierPDF 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_off00014d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14D7B 17604 bytes
SHA-256: a2d5b9d1520145ae73b82aa460a6b4b20eff6616f177b26d48a2b1802310d004
font_01_sfnt_off00017b24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17B24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001933b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1933B 10564 bytes
SHA-256: 4fb010524af5da6022f1262ea0f39ded6e9f7b0b99d384399828f5368a890abc

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