Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd1d797886283db7…

MALICIOUS

PDF

89.3 KB Created: 2021-03-17 00:39:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: a07380e575eb8a765f8492eb8aacfa53 SHA-1: 7c37bf62554b30a6529bde650d70b4aeb9f52f68 SHA-256: bd1d797886283db7e8f892201dc60eba2ee885b4ebac8c57beecd3d65a98a4bf
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme. The document body, though partially corrupted, contains keywords related to 'budgetary control' and 'pdf', likely serving as a lure to encourage users to click on the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://jottigo.ru/award?keyword=budgetary+control+meaning+pdf PDF link annotation
    • https://mozovarowojexi.weebly.com/uploads/1/3/4/8/134867055/tofomodepoxe.pdfIn PDF document text
    • http://gigezesuzobe.getenjoyment.net/39318607911.pdfIn PDF document text
    • http://fupemagis.mywebcommunity.org/causas_sociales_del_alcoholismo.pdfIn PDF document text
    • https://putajomarope.weebly.com/uploads/1/3/1/4/131437676/1391866.pdfIn PDF document text
    • https://gobodukigibab.weebly.com/uploads/1/3/1/8/131856162/12290d6c801.pdfIn PDF document text
    • http://erogan-encolumbia.site/fafurafuwavovepinupa8ia4.pdfIn PDF document text
    • http://prodive.su/how_to_teach_a_3rd_grader_to_write_a_paragraphzb6tl.pdfIn PDF document text
    • https://zugufanebuloko.weebly.com/uploads/1/3/4/0/134016669/7a1556a7a.pdfIn PDF document text
    • https://vumetubav.weebly.com/uploads/1/3/0/7/130776444/17e0d65.pdfIn PDF document text
    • https://romugazasemagop.weebly.com/uploads/1/3/4/8/134897733/dbb9becf1d6c.pdfIn PDF document text
    • https://didoruzokikad.weebly.com/uploads/1/3/0/7/130739542/9793003.pdfIn PDF document text
    • https://fazipebafutemi.weebly.com/uploads/1/3/1/8/131857540/3887192.pdfIn PDF document text
    • http://lezeninimi.medianewsonline.com/bcom_1st_sem_kannada_text_book_free_download.pdfIn PDF document text
    • https://bufasijo.weebly.com/uploads/1/3/2/7/132740378/puzolokate.pdfIn PDF document text
    • http://tibetterrier.ru/freezer_temperature_log_sheetm9nfe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/feleparo.pdfIn PDF document text
    • http://xiwozoget.atwebpages.com/aabb_technical_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/autocad_crack_file_free.pdfIn PDF document text
    • https://s3.amazonaws.com/sorogamat/life_fitness_c3_exercise_bike_reviews.pdfIn PDF document text
    • https://s3.amazonaws.com/lakujusitejojet/17535445270.pdfIn PDF document text
    • https://s3.amazonaws.com/metubevozisul/school_awards_ceremony_program_template.pdfIn PDF document text
    • http://gipebevu.atwebpages.com/lujiwedamigusibi.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011fe9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FE9 5448 bytes
SHA-256: 6a9c35bbd5683093bfc012ff09a8fa485e3ed5c9fb79150515e20b0e6f001ca7
font_01_sfnt_off00013272.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13272 11012 bytes
SHA-256: bcb311b89c8cba190622f3e72920449bd2c466bdd47cc948d9796ce16214c1e6

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