Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ca9463bcf03c652…

MALICIOUS

PDF

75.6 KB Created: 2021-02-16 06:47:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: 40ec6480bae46b121f7247e3ea04ff08 SHA-1: c6b540225055911eb8d9762b79858ee02f4096eb SHA-256: 7ca9463bcf03c652389e2b0d7f4217e6181365f29ad800dc3ccd9ac3848c9441
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 critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs pointing to disposable domains and link farms, suggesting a phishing or malware distribution scheme. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further supports this, indicating the PDF is designed to host many links on low-reputation domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://maypoin.ru/wix?keyword=smooth+endoplasmic+reticulum+analogy+restaurant PDF link annotation
    • http://moviesaddaa.online/pejijamurebigeruknr7ug.pdfIn PDF document text
    • https://nisazixipa.weebly.com/uploads/1/3/0/7/130775104/ae6fd.pdfIn PDF document text
    • http://smartradiobf.ru/baumatic_range_oven_manualpkyhp.pdfIn PDF document text
    • http://veronaital.space/11739558992frwom.pdfIn PDF document text
    • http://nibelv.xyz/cheech_and_chong_full_movien38wz.pdfIn PDF document text
    • http://fbdirect.site/fexukn6zdw.pdfIn PDF document text
    • https://dikijezirepa.weebly.com/uploads/1/3/2/8/132815872/e646e6bd.pdfIn PDF document text
    • https://bugajujifupub.weebly.com/uploads/1/3/4/8/134894919/9926588.pdfIn PDF document text
    • https://sozejaras.weebly.com/uploads/1/3/2/6/132695734/655836.pdfIn PDF document text
    • http://onlinetyz.xyz/kokegelun4pdm.pdfIn PDF document text
    • http://getallcreditscores.info/kisokuduwimixafuluxonehn3zs.pdfIn PDF document text
    • http://smotrikino.fun/complex_numbers_downloadf92eu.pdfIn PDF document text
    • http://tixshopclub.space/the_giver_chapter_329nfa.pdfIn PDF document text
    • https://patewowuxafopon.weebly.com/uploads/1/3/4/5/134595548/zalujepu.pdfIn PDF document text
    • http://vseti.life/952152451388etyx.pdfIn PDF document text
    • http://uplrezina.site/ejercicios_de_suma_resta_multiplicacion_y_division_para_imprimirg52ac.pdfIn PDF document text
    • http://generatorsale.ru/android_update_for_huawei_mate_752k87.pdfIn PDF document text
    • https://favobilumosuxo.weebly.com/uploads/1/3/4/7/134733594/lalun.pdfIn PDF document text
    • https://kegegizexuf.weebly.com/uploads/1/3/4/0/134042356/jorokudobu.pdfIn PDF document text
    • http://particuliers-societegenerale.xyz/dance_magic_dress_upnh8f7.pdfIn PDF document text
    • http://ctyr.ru/globe_load_wallet_retailer_hotlinequz7p.pdfIn PDF document text
    • https://nakofasojerurog.weebly.com/uploads/1/3/4/5/134592478/db26c369ee2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000e973.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE973 5692 bytes
SHA-256: eb21f50d66a27812589e00743a8b416793988ba024c97e448ce240ee5393232a
font_01_sfnt_off0000fcb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCB1 10380 bytes
SHA-256: de300decdb504396f6edcc4dd34e451ea44670dd49a7f693e4cb13baf0223d74

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