Malicious PDF — malware analysis report

Static analysis result for SHA-256 03afdbf86fb545cd…

MALICIOUS

PDF

75.8 KB Created: 2021-03-28 11:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 2bfe88d5fd8c4a6ce74c3ef3b6a440d4 SHA-1: ae7678707d56f1616bfd5b44a9246c8dfb8baf5b SHA-256: 03afdbf86fb545cdaadab23b326d9aaa744c506a2c601b517a0aa585729c7522
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://yafferge.ru/123?utm_term=dslr+camera+software+for+pc'. This URL is likely used to redirect the user to a phishing site or to download a secondary payload. The ML classifier also flagged this PDF with a high confidence score, further indicating malicious intent. No scripts were extracted, but the presence of a malicious URL in a PDF document strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://yafferge.ru/123?utm_term=dslr+camera+software+for+pc In PDF document text
    • http://lumogodasekepi.mypressonline.com/11159419835.pdfIn PDF document text
    • http://kemirekijav.22web.org/where_can_i_exchange_soda_stream_gas_uk.pdfIn PDF document text
    • http://wisatemubudu.medianewsonline.com/how_to_reset_verizon_fios_g3100_router.pdfIn PDF document text
    • http://kagogumo.iblogger.org/vadejuvubunur.pdfIn PDF document text
    • http://nozudozaki.22web.org/guidelines_for_aortic_valve_stenosis.pdfIn PDF document text
    • http://jaralet.getenjoyment.net/adjective_and_preposition_combinations_list.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a03f6fb-c542-4f86-8b48-6f452473f06a/67071046309.pdfIn PDF document text
    • http://mujelinenifa.rf.gd/bikene.pdfIn PDF document text
    • http://sirilamezowi.epizy.com/ophthalmology_clinics_for_postgraduates.pdfIn PDF document text
    • http://fepapemifen.epizy.com/adding_fractions_practice.pdfIn PDF document text
    • http://lepasijon.rf.gd/malayalam_bible_study_psalms.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/who_has_the_most_political_power_in_the_world.pdfIn PDF document text
    • https://s3.amazonaws.com/fobupojowojon/2004_polaris_atp_330_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e87ea6e2-391a-4f18-8d8a-de41844e3c9a/30262017332.pdfIn PDF document text
    • https://s3.amazonaws.com/perurulexi/zixupewapobitazezavag.pdfIn PDF document text
    • https://s3.amazonaws.com/pokorevalaxex/39663146043.pdfIn PDF document text
    • http://gusabonatixuk.rf.gd/31531901810.pdfIn PDF document text
    • https://s3.amazonaws.com/dovulavavo/76477988005.pdfIn PDF document text
    • http://wijopimitiraze.epizy.com/13696314933.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_off0000ed82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED82 5252 bytes
SHA-256: a444eace92d27a51528ad9fe409e101d8f3f9c64a8b8175680c34349e5535f43
font_01_sfnt_off0000ff66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF66 10140 bytes
SHA-256: 865bde6f54833d442dd297c405b16751da98e1a2fef0ac3abb7c9f3a4132e9d2

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