Malicious PDF — malware analysis report

Static analysis result for SHA-256 be21e5547ec8f3a6…

MALICIOUS

PDF

74.5 KB Created: 2021-04-12 08:40:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 90fdc19b56baa751b7bddb0899ab1c32 SHA-1: 292923b0394e616a0748cce769023870ce81e742 SHA-256: be21e5547ec8f3a6fa527cb36fb7228ad6123f9c1de717a2f84717945f2d20c7
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to external websites, many of which are hosted on disposable domains or link farms, indicating a phishing or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a common phishing or malware distribution vector.

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://dugedepap.ru/strik?utm_term=toro+weed+trimmer+electric PDF link annotation
    • https://cdn.sqhk.co/vomofizog/4ibD6jc/vuvoge.pdfIn PDF document text
    • http://fonixeguga.mywebcommunity.org/kali_linux_wifi_hack_tutorial.pdfIn PDF document text
    • https://cdn.sqhk.co/kitaparek/2HEhhgc/cnc_lathe_g_code_simulator.pdfIn PDF document text
    • http://dk-inc.xyz/635523848938s7kq.pdfIn PDF document text
    • http://yyyyyyhhhhh.space/biziwi15hzn.pdfIn PDF document text
    • http://xomunuxeju.sportsontheweb.net/anexo_15_oaci.pdfIn PDF document text
    • http://fanisore.sportsontheweb.net/the_magic_toyshop_angela_carter.pdfIn PDF document text
    • https://cdn.sqhk.co/novoganug/cjiBCja/annotating_on_ipad.pdfIn PDF document text
    • http://sfr-espace.best/9051257618fp0o8.pdfIn PDF document text
    • https://cdn.sqhk.co/woxiwovar/QP8h6gj/58559104764.pdfIn PDF document text
    • https://cdn.sqhk.co/letarezetap/glkiijh/37947139217.pdfIn PDF document text
    • http://bizowokare.getenjoyment.net/asma_alergica_en_nios.pdfIn PDF document text
    • https://cdn.sqhk.co/tajudozizif/hdifujj/planetary_gearbox_animation.pdfIn PDF document text
    • http://livecopyrightverification.com/61695303268a1ruv.pdfIn PDF document text
    • http://mmamba.ru/sherlock_holmes_download_in_hindi_filmyzilla8o94n.pdfIn PDF document text
    • https://cdn.sqhk.co/sofawaju/AjfdNnX/67912655648.pdfIn PDF document text
    • http://kafalukuwemi.mygamesonline.org/antigeno_carcinoembrionario_cea.pdfIn PDF document text
    • http://fejavodexata.getenjoyment.net/plantronics_backbeat_pro_2_anc_not_working.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/sop_imunisasi_puskesmas_akreditasi.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_off0000e83c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE83C 4740 bytes
SHA-256: c11313201a711819a193696c38eed39d66ceba0ca79d499586754500c4f0825b
font_01_sfnt_off0000f854.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF854 10784 bytes
SHA-256: 57f46acfb9a98d59c0f73c5fb3a4736db9c3269f739ddf99f36f4a623571a7d4

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