Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae753eb727819496…

MALICIOUS

PDF

75.8 KB Created: 2021-03-24 18:59:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 8ebc7c845ae3b54394eea57b53cbdf35 SHA-1: 04721630ec14bec307390b49825bfd41b55652b7 SHA-256: ae753eb7278194966d37e202b3e7a8ee1c77a7202238e0bca3a1eac979cfe581
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious. It contains numerous external URIs, with one specifically pointing to 'https://leonvi.ru/award?keyword=amlodipino+mecanismo+de+accion+pdf', suggesting a lure to a site related to the document's apparent topic. The presence of multiple links on disposable hosting further indicates a link farm or phishing operation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://leonvi.ru/award?keyword=amlodipino+mecanismo+de+accion+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4415534/normal_5fc7ebc82530a.pdfIn PDF document text
    • https://cdn.sqhk.co/dugixikisim/QFq65ha/simple_box_android_tv_box_launcher_apk_full.pdfIn PDF document text
    • http://wivikaxebox.medianewsonline.com/78280775209.pdfIn PDF document text
    • http://devubowoku.mypressonline.com/frankie_and_benny_s_menu.pdfIn PDF document text
    • https://cdn.sqhk.co/sowojusawepu/SAOJXjj/angry_plants_classic_mod_apk_unlimited_power_ups.pdfIn PDF document text
    • http://juborad.mywebcommunity.org/iron_maiden_aces_high_guitar_tab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389568/normal_5ff4d609958b6.pdfIn PDF document text
    • http://bometaximom.scienceontheweb.net/29579615391.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/Klehiif/tusizozozoravu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468270/normal_60118eaa3e655.pdfIn PDF document text
    • http://fagixadako.iblogger.org/tomb_of_annihilation_backgrounds.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://luxaneguwes.rf.gd/baixar_creator_free.pdfIn PDF document text
    • http://zimifad.epizy.com/lean_six_sigma_green_belt_certification_cost.pdfIn PDF document text
    • http://dizoduji.rf.gd/diwali_wishes_templates.pdfIn PDF document text
    • https://c948e902-2437-43f3-9f1e-7aaad30688a7.filesusr.com/ugd/464a75_e7d3f47007b34976bee24c8fcfa0e58b.pdf?index=trueIn PDF document text
    • http://gurimufibefuw.rf.gd/que_es_el_ayurveda.pdfIn PDF document text
    • http://naxefugoxodikow.atwebpages.com/81535716613.pdfIn PDF document text
    • https://3df06c22-1e8a-4082-8cc2-a0fdc0609706.filesusr.com/ugd/d86e81_0338bc9af74540d7aee3250145caf3be.pdf?index=trueIn PDF document text
    • http://vabelel.epizy.com/61903662211.pdfIn PDF document text
    • http://luselobek.epizy.com/exercises_on_past_tenses_with_answers.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_off0000ea37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA37 5196 bytes
SHA-256: d8a5cab7aca941af32ecb41bb0dc3c4262e52f61db793feb3ffebe1ac4cb52bf
font_01_sfnt_off0000fbd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD8 11276 bytes
SHA-256: cc47b3023b7ca8d0e180369d05dda02fb115a2a9cd7644a49452a3098c870573

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