Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e0cbd7fc39e1ce…

MALICIOUS

PDF

74.4 KB Created: 2021-02-19 15:49:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: c983b5351249cb3f3a77fd920ba7c5b6 SHA-1: 9268514f05a174ceea3cffc8ef32105858242d04 SHA-256: 15e0cbd7fc39e1ce16dbba1181cb91e1b323d6fb39742964a4b9c5442a9f844c
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document, possibly leveraging embedded JavaScript for redirection.

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://bologen.ru/wix?keyword=kodi+ps4+theme PDF link annotation
    • http://heretythere.site/illustrated_english_spelling_dictionarymbypf.pdfIn PDF document text
    • http://insuranceautousa.com/sadness_and_sorrow_piano_midic5mj2.pdfIn PDF document text
    • http://zarabotok.space/react_form_checkbox_valueey0dp.pdfIn PDF document text
    • http://universityru.fun/cpm_algebra_2_book_answers6h2yv.pdfIn PDF document text
    • http://nusorogexirexi.22web.org/free_android_emulator_lite.pdfIn PDF document text
    • http://idealica-official-it.website/emotion_cards_for_autism_freezf69g.pdfIn PDF document text
    • https://rimenedefogifu.weebly.com/uploads/1/3/4/4/134466040/d4d219206783b9.pdfIn PDF document text
    • http://idealica-italiauficiale.website/dejasutip5et7k.pdfIn PDF document text
    • http://gojepifega.22web.org/53072158393.pdfIn PDF document text
    • https://xutepodufolesik.weebly.com/uploads/1/3/0/7/130739265/dufido.pdfIn PDF document text
    • https://mogimefiledewe.weebly.com/uploads/1/3/1/8/131857364/tomefewevusebon.pdfIn PDF document text
    • http://graatorama.fun/xiroduxekoxumaxogirulajevj3krr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://totofexux.epizy.com/chronic_pancreatitis_treatment_guidelines.pdfIn PDF document text
    • http://gexagulajiv.rf.gd/wapovojusosojeponelot.pdfIn PDF document text
    • http://jijetebum.epizy.com/xidelewujerafusudosen.pdfIn PDF document text
    • http://jigosip.epizy.com/bekhayali_song_female_mr_jatt.pdfIn PDF document text
    • http://kikexufan.epizy.com/pifoseragelevotaxugurizu.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_off0000e82e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE82E 4920 bytes
SHA-256: 4fc6ef88b686f99f50ca1e22d9ebc7cd8f6f7a6b6baa244a9c4fe45c24d44363
font_01_sfnt_off0000f8d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D3 10476 bytes
SHA-256: b4c646fa025c52a6c1df1431b0d70e5495a2d3813440f99ff4f2addf1700536a

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