Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df3664487e1d4b2…

MALICIOUS

PDF

74.4 KB Created: 2021-03-24 03:07:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 188f917f905008d0dd8970b3eedbc2df SHA-1: c88ef57836a1728df40c5f4eab8e3b9ba794dcda SHA-256: 7df3664487e1d4b28d647021e0e47ed2476e1e84fb8d122305af564241c347d8
96 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate maliciousness. The PDF contains an embedded external URI pointing to a suspicious domain, mezovuduw.ru, which is likely used to host a phishing page or distribute further malware. The presence of multiple unknown URLs further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mezovuduw.ru/award?keyword=organismo+ejecutivo+pdf PDF link annotation
    • http://latencfsrt.space/rujomxb7hl.pdfIn PDF document text
    • http://martakkord.ru/68972628152629i1.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/CqLhfN7/localizar_mi_android_por_gps.pdfIn PDF document text
    • http://ledimpress.biz/xexavarud43edy.pdfIn PDF document text
    • https://cdn.sqhk.co/viforoge/igejjie/great_farm_dogs.pdfIn PDF document text
    • https://cdn.sqhk.co/bezupidokaz/nLVAs4n/wiloje.pdfIn PDF document text
    • https://cdn.sqhk.co/perikowep/hhhdeha/classic_car_city_racing_3d_model.pdfIn PDF document text
    • http://skidki-day.shop/beyond_the_skyline_parents_guidevwdu2.pdfIn PDF document text
    • http://car-den.ru/bengal_tiger_telugu_movie_tamilrockers2hxys.pdfIn PDF document text
    • http://kopirugi.iblogger.org/picadora_de_maiz_manual.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pefegisip.epizy.com/toshiba_vhs_dvd_player_recorder.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/amc_12b_2018.pdfIn PDF document text
    • http://gelidug.epizy.com/poemas_de_la_consumacin_vicente_aleixandre.pdfIn PDF document text
    • http://mirowoke.rf.gd/porque_le_pasan_cosas_malas_a_la_gente_buena_libro.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/one_punch_man_anime_to_manga.pdfIn PDF document text
    • http://nifibomagogov.rf.gd/nawebipawofekunubudob.pdfIn PDF document text
    • https://s3.amazonaws.com/visagogijulep/zombie_life_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/11317282082.pdfIn PDF document text
    • https://s3.amazonaws.com/bisazabe/wavepad_audio_editor.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_off0000e583.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE583 5604 bytes
SHA-256: bae1c5210ff97ba487f5d45fbebe28d886ecc412af77251796bdc39963aec6ef
font_01_sfnt_off0000f88b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88B 11116 bytes
SHA-256: dc491622ec8dcbed50322a2dabdde75d495090b44832d5ef182d536f48c78a0c

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