Malicious PDF — malware analysis report

Static analysis result for SHA-256 82ba7f0234890133…

MALICIOUS

PDF

76.3 KB Created: 2021-06-07 19:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 64fb20d9524db646a7a7cac92e519d0f SHA-1: 505ca66df683f75e1a5739bb0b6fc595f4c61969 SHA-256: 82ba7f0234890133b8910a82426d7d0817119e3e6632fc41088a0f00d814f968
126 Risk Score

Malware Insights

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

The PDF contains numerous links to disposable hosting sites, suggesting a link farm designed to trick users into downloading malicious files, as indicated by the 'Pdf.Phishing.Trojan' ClamAV detection and ML classifier. The embedded URLs and the nature of the link farm point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://catamma.ru/pbw?utm_term=descargar+driver+de+sonido+para+windows+xp+gratis PDF link annotation
    • https://xixunogada.weebly.com/uploads/1/3/4/3/134343035/7905708.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426060/normal_5fd974b05fc8e.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4448550/normal_60b447a1a4ec6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393369/normal_6042e9fcbcac7.pdfIn PDF document text
    • https://gidedumewulo.weebly.com/uploads/1/3/5/9/135961218/5463895.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4411245/normal_60b3b4ffbdf43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410204/normal_605d9b64e7043.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://larabefejaji.pbworks.com/w/file/fetch/144657096/57244986659.pdfIn PDF document text
    • http://wisarazed.pbworks.com/f/7845362056.pdfIn PDF document text
    • http://zawepiko.pbworks.com/f/how_to_clean_fujitsu_heat_pump_filter.pdfIn PDF document text
    • http://tujedet.pbworks.com/w/file/fetch/144628056/pokemon_omega_ruby_gba_rom_free_download.pdfIn PDF document text
    • http://lukipuj.pbworks.com/f/tarjeta_de_cumpleaos_para_una_amiga_y_hermana.pdfIn PDF document text
    • http://jujupaw.pbworks.com/w/file/fetch/144533643/ozymandias_poem_main_idea.pdfIn PDF document text
    • http://pikalunik.pbworks.com/w/file/fetch/144694635/how_to_write_a_resignation_letter_for_family_problem.pdfIn PDF document text
    • http://furalagaposu.pbworks.com/w/file/fetch/144670785/funny_short_stories_in_arabic.pdfIn PDF document text
    • http://gosirata.pbworks.com/w/file/fetch/144668769/compare_and_contrast_essay_examples_for_high_school.pdfIn PDF document text
    • http://farejutotej.pbworks.com/f/compress_ke_jpg_200kb_online.pdfIn PDF document text
    • http://xosufixemuf.pbworks.com/f/freshwater_shrimp_farming_in_tanks.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dba5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBA5 3176 bytes
SHA-256: e373345ed6999f3d541ad3998c3cb4b1ff5f2f0f5a557914abe5ee00eba7a3a4
font_01_sfnt_off0000e704.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE704 5428 bytes
SHA-256: 068b8fe2d456215f2fbaac0f2e86cddfa8b8370bd462f6e4337bff7d4228117b
font_02_sfnt_off0000f9af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9AF 13268 bytes
SHA-256: 8a54dbb83c11b91e423f95f259dae3c0da7a7762054069b9325ec67cb0245be0

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