Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e054ccd2a8d7633…

MALICIOUS

PDF

76.1 KB Created: 2021-09-07 05:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b871afb4addf8da02b29c5d4c8430d2f SHA-1: 99c1f5db24d36a6dc20a0d86216a57a5cec603e4 SHA-256: 7e054ccd2a8d763351ef6c787d224bae91b0974dbe7343d885692ca5416348a0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier indicating a high probability of maliciousness. The file contains a link farm pointing to compromised CMS upload storage, suggesting an attempt to distribute further malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://kaupa.cz/userfiles/file/pajamevexatenada.pdf In PDF document text
    • http://agiteam.org/clients/b/b0/b0c4817036ef1cb73596cc935f3fa86d/File/mugafe.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609107b5beed8---latinigeb.pdfIn PDF document text
    • https://eseninternational.com/uploads/files/tutevisunofa.pdfIn PDF document text
    • http://archidaldegan.eu/userfiles/files/luvumusuwifijudadarel.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/e75435d8c91115e09016d77dd2f2267a/minelavu.pdfIn PDF document text
    • https://micast.de/wp-content/plugins/super-forms/uploads/php/files/559h343dcfqj63lq5788sure92/mowanuruxomida.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b8e8fd1ced7---xikifexubosem.pdfIn PDF document text
    • http://sattosushi.com/uploads/files/febutajuwegarogun.pdfIn PDF document text
    • http://www.look4job.gr/images/_user_na/file/jajajigifatufije.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612a293b0cf66---30086943769.pdfIn PDF document text
    • https://nazrabilisim.com/calisma2/files/uploads/16212513935.pdfIn PDF document text
    • http://csc0451.com/userfiles/file/20210725134922_yx9vbs.pdfIn PDF document text
    • http://aliguoriarchitetto.eu/userfiles/files/48821923079.pdfIn PDF document text
    • https://pinyardim.com/calisma2/files/uploads/junorivuvisinew.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/5b036e494528469241138daed0f500e1/sazebexekoso.pdfIn PDF document text
    • https://giant-nano.com/app/webroot/userfiles/files/59544963142.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/noxala.pdfIn PDF document text
    • http://jullien38.com/ressource/site-image/files/vanebex.pdfIn PDF document text
    • https://senfina.top/uploads/files/11288060136.pdfIn PDF document text
    • https://eternalbliss.net/file/80840780394.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/durim.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/gqbgjovu92o4vvk3686ecdnf8q/29276270411.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=movimentos+orogenicos+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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c2ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2EE 10812 bytes
SHA-256: 53d801fe9aaab57932da47de02dd200be13b25cb4572b0435637323884e1945e
font_01_sfnt_off0000dbac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBAC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f3be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3BE 18060 bytes
SHA-256: 70f4cf83f3acae2047525e1cc221e1a04a49ef590b009d00e432203d3431e2b3

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