Malicious PDF — malware analysis report

Static analysis result for SHA-256 c707f918e979382a…

MALICIOUS

PDF

97.3 KB Created: 2021-09-03 07:28:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: a3a88d8cbfa85aae41be092f883d397c SHA-1: 0e431d11432313ff161e4bad02574ef7cbf8d6a5 SHA-256: c707f918e979382a166edf33de72780876f35e4942e26fecfba3e85b3976b24e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. The document functions as a link farm, directing users to various external URLs, some hosted on compromised CMS uploads and disposable domains. While no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to lure users to malicious content, likely through a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9881

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 http://adamshs-pdx.com/clients/d/d3/d3c120c733f7363e2cdaef2cff5f3687/File/goziwodid.pdf In PDF document text
    • http://brandiassociati.it/userfiles/file/gifirurikulazor.pdfIn PDF document text
    • https://5a.ro/ckfinder/userfiles/files/66490001334.pdfIn PDF document text
    • http://zpb-maciejewski.pl/upload/fck/file/63407523791.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/9cbdd502b2ff45ef490bf012f9d1cad6/ravagisibawizevonetiz.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/i98ledomegs203nbgqj1ubcn3l/fevamamofunovuzuvupop.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/10428989908.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/71117129547.pdfIn PDF document text
    • http://candientushinko.com/images/file/funipudisagib.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/3faf7d3c63beb89f7dc0d5b34654695b/51575878104.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ae836d19fd6---towire.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/9e61acd7233f698f9b8b52b7b8eb5a35/62318139321.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/bifufamiga.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/jafukubafisovoza.pdfIn PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/35fc080000f3c12f74314c2dcaf899d9/nefifezaxuvadures.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/nuzuluwonujewiregosevaka.pdfIn PDF document text
    • https://anglarill.net/userfiles/file/domidizisopuxugad.pdfIn PDF document text
    • http://sciattella.net/images/file/97830420495.pdfIn PDF document text
    • http://sibleyestateplanning.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/62740756121.pdfIn PDF document text
    • https://pbchistoryonline.org/uploads/file/kuvanezafebuwu.pdfIn PDF document text
    • http://kancelaria-perfect.pl/app/webroot/media/files/11089301326.pdfIn PDF document text
    • https://westcoastmovers.ca/wp-content/plugins/super-forms/uploads/php/files/vjskqq1v32qtqnrp5jj0cfn4f8/53465324935.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=mahallul+qiyam+lengkap+pdfPDF 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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dd90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD90 2212 bytes
SHA-256: f6480144cbf7afc180b168c3ac52230e16534ad210e8bde86ca5ccf6476ca322
font_01_sfnt_off0000e781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE781 16756 bytes
SHA-256: fa599922c2e247edb09f6ccaed912202c513f3355f385c9c414751849fa9dd28
font_02_sfnt_off0000ff2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00011743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11743 10904 bytes
SHA-256: 8e8378fe1755d198ff9698853dca403be54448257d5444d199848715709d9b99
font_04_sfnt_off00012faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FAA 28468 bytes
SHA-256: ccfa4022f609e6bb3f0d3afefea5c2d3fce990e3563142428eb10b6fa82ef487

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