Malicious PDF — malware analysis report

Static analysis result for SHA-256 7267a24878dee1fa…

MALICIOUS

PDF

75.7 KB Created: 2021-03-14 03:15:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3eb6645927a5c497c349961c30d91b8c SHA-1: edcbd99e2fbfa398f6ebfb6e9f8471c0d1a7c8a8 SHA-256: 7267a24878dee1fa8b91db19ccca43ed36f1c0a3ea3832d1257327e820f44849
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous embedded URLs, with a primary one pointing to 'https://jumiwimov.ru/award?keyword=centre+periphery+theory+pdf', suggesting a lure to a phishing site. The PDF also functions as a link farm, hosting many other PDF documents on disposable domains, which is a common tactic for distributing malware or conducting phishing campaigns.

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/award?keyword=centre+periphery+theory+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4497658/normal_600a408a2a9b4.pdfIn PDF document text
    • https://cdn.sqhk.co/jubawiwa/ljfbwid/letisewaras.pdfIn PDF document text
    • https://cdn.sqhk.co/tokebamojos/mpsgeeN/braains._io_rich_city.pdfIn PDF document text
    • https://cdn.sqhk.co/rusobotakox/igghja3/domino_s_pizza_menu_and_prices_list.pdfIn PDF document text
    • http://widonatozeg.mypressonline.com/sujodojabiwalorubezarikat.pdfIn PDF document text
    • http://kajejib.medianewsonline.com/printable_triple_yahtzee_score_sheets.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470221/normal_6020615ed0aa4.pdfIn PDF document text
    • http://banademebilite.sportsontheweb.net/ielts_vocabulary_learn_300_essential_words_for_ielts_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482863/normal_60120a6951588.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/77327699260.pdfIn PDF document text
    • http://juluzenaluziwo.22web.org/how_to_install_focusrite_scarlett_2i2_on_windows_10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403262/normal_6027da2181b36.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4497078/normal_5ffeb20247a6d.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/43538127695.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fuvamawijivef.atwebpages.com/kopipatuvit.pdfIn PDF document text
    • http://juzavinozil.epizy.com/gefeviseb.pdfIn PDF document text
    • https://35b1a599-9f45-4897-82ce-59a931fc5495.filesusr.com/ugd/daca0d_ddc00b488ad94dfb8d413765f947e7c0.pdf?index=trueIn PDF document text
    • https://a581e706-3bf6-41fb-8978-ad4d4077590d.filesusr.com/ugd/afbe6b_ae23c271b6594743888f9083a3a7e1e1.pdf?index=trueIn PDF document text
    • http://kikanelomer.onlinewebshop.net/bafopexurek.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_off0000ebd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBD2 4716 bytes
SHA-256: 780243055481430dc751adbc99448317879fa8cd2577fc61c3a7d977f7c8a835
font_01_sfnt_off0000fbd9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBD9 11056 bytes
SHA-256: 4bbbd16f29c017ac809e7d0b9cd858398580fa68c9acfd589e81f3d45d672462

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