Malicious PDF — malware analysis report

Static analysis result for SHA-256 65f5cd031f00d7fb…

MALICIOUS

PDF

76.5 KB Created: 2021-03-16 16:51:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf4337300e6e04e0077cae046279cf89 SHA-1: e9fd700c841d14631260be2fabf57dd68eaea0d1 SHA-256: 65f5cd031f00d7fbadd084134ee94156f065ac21bf96a6ed4890592b59d2a634
126 Risk Score

Malware Insights

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

The PDF file, disguised as a 'Chilli plants growing guide', contains numerous embedded links pointing to disposable domains, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for distributing further malware or conducting phishing attacks. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

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://jumiwimov.ru/123?utm_term=chilli+plants+growing+guide
    • http://magic-spring.com/pavawuwizojiletiwavofduxg8.pdf
    • http://zelopaqq.xyz/duchess_of_malfi_play_londonusuuf.pdf
    • http://leree4.club/capitulo_6b_2_los_quehaceres_answersgrwsk.pdf
    • https://rebodegumirimak.weebly.com/uploads/1/3/0/7/130775130/87fb7b.pdf
    • http://mufadetajamojo.iblogger.org/rizituv.pdf
    • http://damvglaz0.xyz/4811437592402yx0.pdf
    • http://zugasanuko.getenjoyment.net/whats_the_difference_between_joy_and_happiness_in_the_bible.pdf
    • http://duplicwcnj.space/feng_shui_color_for_20219574p.pdf
    • https://pitefomut.weebly.com/uploads/1/3/2/6/132682610/8011552.pdf
    • https://cdn.sqhk.co/bebomopakax/uKtjXgd/arkham_horror_lcg_rules_reference.pdf
    • https://cdn.sqhk.co/jasuxerazifo/BgdpUgi/super_slow_motion_camera_app.pdf
    • http://vosojivaru.mypressonline.com/tanozapofades.pdf
    • http://baramijotafexo.mypressonline.com/how_to_setup_scan_on_hp_officejet_pro_8620.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://128fc002-9ed4-4a8f-9a6b-83b43563a9ed.filesusr.com/ugd/6812d7_c6266b82b7e24a039c67d7daead101ca.pdf?index=true
    • http://zozepowitoped.epizy.com/95658554910.pdf
    • https://8dfdba76-182f-4dc4-9dda-37a8c8d09dc9.filesusr.com/ugd/4ae4db_a196c3deb506451abbf31f7c5377ed6c.pdf?index=true
    • http://mitefunigesito.rf.gd/cbs_evening_news_field_reporters.pdf
    • http://guwaxilajoxeza.onlinewebshop.net/josiwoxenuka.pdf
    • http://wafugid.epizy.com/11763559397.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee34.bin
1ee5f91e32bb8baaec67641a512c06925186dd0162b156a2f72fb87888ba38be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE34 5220 bytes
font_01_sfnt_off0000fff4.bin
b09e21240fcfa60a4cc99f0522b7ae01d1d0bc7c67cc451583853e384685c427		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF4 10856 bytes

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