Malicious PDF — malware analysis report

Static analysis result for SHA-256 ff29f31610de3695…

MALICIOUS

PDF

76.0 KB Created: 2021-03-31 02:42:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: d831b066c82943f5875cf499887f0342 SHA-1: 4758c3205ab457f7cc3f64e41b4253a998b2d6f8 SHA-256: ff29f31610de3695b4ecac08a39d3290a633e3c848d60087810f730239bdd7c3
126 Risk Score

Malware Insights

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

This PDF was flagged as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, likely for phishing or malware distribution. The embedded URL 'https://ponafet.ru/123?utm_term=cerritos+performing+arts+center+address' is a primary indicator of this malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/123?utm_term=cerritos+performing+arts+center+address PDF link annotation
    • http://fazurusitu.getenjoyment.net/12111106095.pdfIn PDF document text
    • http://hookup153.space/lifalojadig3qhcg.pdfIn PDF document text
    • http://potawuzaj.medianewsonline.com/application_letter_for_lecturing_at_university.pdfIn PDF document text
    • http://bulewedulipofam.iblogger.org/sejunaguxonusedu.pdfIn PDF document text
    • http://birapemotafew.mygamesonline.org/25568850231.pdfIn PDF document text
    • http://top-agent.ru/anteproyecto_reforma_codigo_civil_y_comercial8b3w9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://03ca3561-abfe-48ca-9b59-b1b2b77f8126.filesusr.com/ugd/1af49e_8cb0a250d5864603bad28716669543ec.pdf?index=trueIn PDF document text
    • http://koziviwuvep.epizy.com/joseph_blenkinsopp_isaiah.pdfIn PDF document text
    • https://d05b2b94-0af3-401c-a6ef-75d00d0b58ae.filesusr.com/ugd/3bca44_d7cb0d65ab2b49819545707625c2bb8c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/pdf_writer_bytearrayoutputstream.pdfIn PDF document text
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_c848a8dd67a44782b096fade52447917.pdf?index=trueIn PDF document text
    • http://tuguxukoz.epizy.com/ascension_wow_build_guide.pdfIn PDF document text
    • http://molulig.epizy.com/dibujos_colorear_halloween.pdfIn PDF document text
    • https://s3.amazonaws.com/gurafoga/zuzujeluxugaduxemixas.pdfIn PDF document text
    • http://nerezusilanake.atwebpages.com/printable_periodic_table_of_elements_with_everything_labeled.pdfIn PDF document text
    • https://dae57379-2785-4108-a223-4562ecbfc22e.filesusr.com/ugd/87ad98_ff0ca88036e34115b1b9cb3561fd3727.pdf?index=trueIn PDF document text
    • http://norilonabu.epizy.com/65596703191.pdfIn PDF document text
    • https://48cc712b-de5e-493e-a198-f8962849e22b.filesusr.com/ugd/d2751c_4ff47340905b43aab1239cf4770c8852.pdf?index=trueIn PDF document text
    • http://pixafur.atwebpages.com/susevikinebemudizaxubi.pdfIn PDF document text
    • https://0bdb67af-4c57-4a6e-9706-714cc80719f5.filesusr.com/ugd/fc840b_f9616c0acb7d4bbe842552d255bfa246.pdf?index=trueIn 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_off0000e9ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AC 5348 bytes
SHA-256: ed90722f54a361f16ae3d5108d4e5d32d74347c8a2c1ac6d50c0ff06aacf586b
font_01_sfnt_off0000fbc1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC1 11688 bytes
SHA-256: 8b0e773b9c94ce97fc6ff2e90ff18e60ec2d31df53eacbb2aeb5e041c0975bfd

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