Malicious PDF — malware analysis report

Static analysis result for SHA-256 32e46b03563e0eea…

MALICIOUS

PDF

77.9 KB Created: 2021-03-17 15:41:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c8f4ca7dfbc3a5e504885dc58b9b77e4 SHA-1: 75afa4987d6e4beed3d0b41df9fad19c74e3c7e1 SHA-256: 32e46b03563e0eea5cb465ee83f8153208c2c7db5c1d0c34ec1125abe9a04017
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including a machine learning model and ClamAV, indicating malicious intent. The PDF contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution campaign. The presence of external URIs and the 'link farm' heuristic strongly suggest the document's purpose is to redirect users to potentially harmful sites.

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://maypoin.ru/123?utm_term=solitaire+apps+free
    • http://tgesheff.xyz/free_online_medical_translation_spanish_to_englishge967.pdf
    • https://cdn.sqhk.co/zezaxemepe/jcPie8j/34934037150.pdf
    • http://vogeposekuxav.66ghz.com/forming_storming_norming_performing_adjourning_meaning.pdf
    • https://static.s123-cdn-static.com/uploads/4452599/normal_5feb0adb26e6e.pdf
    • http://stixlife.info/momuputajifepojesofisnhtm.pdf
    • https://static.s123-cdn-static.com/uploads/4367914/normal_6000cb707f9e9.pdf
    • http://ketousa.site/how_husband_should_treat_wife_quoteskn248.pdf
    • http://reduslim-italiaoficial.site/rokekegixivezonuctqaq.pdf
    • http://jasubizajimalep.iblogger.org/36816675743.pdf
    • http://eeeeeyyy.space/mironufebonejerorigilusw69a5.pdf
    • https://cdn.sqhk.co/kakapoxavu/gfsegfW/15554108729.pdf
    • https://cdn.sqhk.co/burexewejam/idy7Vif/givizaxalisegat.pdf
    • https://cdn.sqhk.co/podadoxafa/iaifXji/3d_crystal_puzzle_castle_directions.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://mufozugiro.rf.gd/nyssma_level_5_vocal_solos.pdf
    • http://xogebaf.rf.gd/lonepajilagejomowitubuk.pdf
    • http://xetonuvabogo.rf.gd/sonaloguge.pdf
    • http://setiwifuv.rf.gd/extreme_flight_extra_300_60_manual.pdf
    • http://vopipewulowapa.rf.gd/wiwafositibi.pdf
    • http://roxanotox.epizy.com/wilderness_survival_tools_list.pdf
    • http://bevowamudad.epizy.com/arc_length_problems.pdf
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e834.bin
723bc0ee661e01da03d0bb60741e39240c4f3fd2a942821f29e101554b655e81		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE834 4680 bytes
font_01_sfnt_off0000f81b.bin
dae68e110e6639295d77aedd9163100236f7345e36804166979b702e1cd76c45		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF81B 10804 bytes
font_02_sfnt_off00011ce5.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE5 4324 bytes

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