Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f01568cee8513e6…

MALICIOUS

PDF

75.9 KB Created: 2021-03-24 02:58:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c99e55e5e21abcd74d58d118991f8ab6 SHA-1: 29f35c81a72a1ee43bdd325a5b4dce1a5dfa881f SHA-256: 0f01568cee8513e67f00ef3cae7ea033ecf55f2c6530462d7218969446f49c24
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to potentially malicious domains, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the presence of numerous external URIs suggests the document is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://kuzutuzo.ru/strik?utm_term=what+is+a+relative+frequency+table+in+statistics
    • https://cdn-cms.f-static.net/uploads/4383460/normal_603b7be92b8f9.pdf
    • https://cdn.sqhk.co/soxuvezosapa/djcjfhf/liwuzovonuzizakilidi.pdf
    • http://sadinexiwa.mygamesonline.org/la_biblia_latinoamericana_online.pdf
    • https://cdn.sqhk.co/gogoturowib/sjj6gdP/54958793981.pdf
    • https://cdn.sqhk.co/bitaxukezor/5V9HhMM/29235585869.pdf
    • https://cdn-cms.f-static.net/uploads/4425760/normal_60565c0e90a4c.pdf
    • https://cdn.sqhk.co/jaselavujuwi/MiddobS/uba_mobile_banking_registration_process.pdf
    • https://cdn.sqhk.co/wetilusogaki/ghjgjdp/nitolonorisal.pdf
    • https://cdn.sqhk.co/letarezetap/qCFbfIF/free_funeral_program_brochure_psd_template.pdf
    • http://xonigej.mypressonline.com/thermo_king_apu_code_eng.pdf
    • https://static.s123-cdn-static.com/uploads/4530990/normal_6003bf95daa06.pdf
    • https://cdn.sqhk.co/saboxiwago/ghhi5gc/minecraft_download_free_download_windows_10.pdf
    • https://cdn.sqhk.co/vefemenivu/fidieic/96904270043.pdf
    • https://cdn.sqhk.co/bazexolareja/idjgk8r/business_card_design_template_free.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://5b0e1d79-1acc-45ba-a965-31015372eee8.filesusr.com/ugd/67f5f7_f217bbe1466b438e85ef6904520e18c9.pdf?index=true
    • https://69cf8a46-0d3d-4b71-8fd1-93df925da18e.filesusr.com/ugd/e4064d_d84531057f5b4d00adda519658aa75dc.pdf?index=true
    • http://mekasesajiw.onlinewebshop.net/convert_to_word_doc_on_mac_free.pdf
    • https://0efdb04f-128a-4c0d-ace4-8b312723ebcc.filesusr.com/ugd/5508f4_7d9e0742f5644c5db82eafea4117e7c0.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8de.bin
0507d26d1047e28c6295281e40b8b7e5d9b660e5178465d2d8dfb82135085b8e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE8DE 5408 bytes
font_01_sfnt_off0000fb5b.bin
6539f8c421854440e3618e31a2bf0ec469068774a7d7b54a893d9d906d112bdc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5B 11368 bytes

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