Malicious PDF — malware analysis report

Static analysis result for SHA-256 c491c58764af5dbe…

MALICIOUS

PDF

74.6 KB Created: 2021-05-12 14:17:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c6d3d401611d70a6ba131a305e0e8008 SHA-1: b13bb4fa2a327820a3c7dc1457a4ef012e49606d SHA-256: c491c58764af5dbeb90a588adde7296170dcd5edc89599c2b645734a3fc7d093
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier returned a high probability of maliciousness. An external URI pointing to 'mezovuduw.ru' was extracted, which is likely the phishing site. The PDF structure itself contains obfuscated content, but the primary malicious intent appears to be directing users to the external URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/strik?utm_term=alex+rider+scorpia+rising PDF link annotation
    • https://cdn.sqhk.co/wavagowew/Q1jgeic/antenna_nptel.pdfIn PDF document text
    • http://zoneeuro.pro/gumaloledopabavegetuwedaszaml.pdfIn PDF document text
    • http://vevaroda.scienceontheweb.net/99710477378.pdfIn PDF document text
    • https://cdn.sqhk.co/ripalufix/fiiTgid/glymphatic_system_detox.pdfIn PDF document text
    • http://com-connexion.xyz/sugenela2tlsd.pdfIn PDF document text
    • http://rasipafus.getenjoyment.net/2741909502.pdfIn PDF document text
    • http://jopkapopka.online/kukiwerl9gsf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff81b377-a014-4242-a223-02b8cbbd3423/344538780.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/graphics_cards_performance_chart_2019.pdfIn PDF document text
    • http://joberemig.atwebpages.com/21499758715.pdfIn PDF document text
    • https://s3.amazonaws.com/tezofuretejom/pusozukejodiwagibugoxexe.pdfIn PDF document text
    • http://vewawisu.onlinewebshop.net/baby_registry_checklist.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/55606438782.pdfIn PDF document text
    • https://s3.amazonaws.com/wokesabisevo/gepege.pdfIn PDF document text
    • http://gapoxuvopa.onlinewebshop.net/64642639633.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c27e81d-f660-43ea-9bf3-a8e8784be29f/echo_leaf_blower_pb_580t_reviews.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d2529d5d-b68a-4851-9c26-56ae2f765224/hornady_129_sst_6.5_creedmoor_bullets.pdfIn PDF document text
    • https://s3.amazonaws.com/ravuxudibure/8286218217.pdfIn PDF document text
    • https://s3.amazonaws.com/wuwabobujasivor/xalepadegojizemozudis.pdfIn PDF document text
    • https://s3.amazonaws.com/xepululejiwof/memujalagafajek.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_off0000e5dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5DD 5296 bytes
SHA-256: 1cd309f152c1a89b9bf7c918ec503bd8677293d822d94e9173a0186ca7f86337
font_01_sfnt_off0000f7f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F4 10992 bytes
SHA-256: 9717c2a0d1086dd0002cfc4ed5e85ed235fdbb92f2591520fc6f1ba4915d88d1

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