Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0da223cd6a0d455…

MALICIOUS

PDF

89.8 KB Created: 2021-02-06 15:27:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: dba5a1814b3b5be8267e1ecd450f6aa7 SHA-1: d27242ba8aeb81f648dbf633c7320ef8906a86f5 SHA-256: e0da223cd6a0d455def2c71f4d31ea26bbee9e9e2e2b79b9c4505625d3ce7b40
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://seumenha.ru/123?utm_term=140+lbs+to+kg+formula PDF link annotation
    • https://gepadagonuvo.weebly.com/uploads/1/3/0/7/130775626/xegafitemuvamofa.pdfIn PDF document text
    • https://fejuzewe.weebly.com/uploads/1/3/4/8/134883228/virere.pdfIn PDF document text
    • https://cdn.sqhk.co/nepusoliweda/kihphhg/translate_english_to_spanish_documentary.pdfIn PDF document text
    • https://cdn.sqhk.co/mugejufunij/5gcie6j/jaxedavexosufefuramoziz.pdfIn PDF document text
    • http://nelitip.22web.org/mujazimitojusalikofo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426957/normal_5fc878b27d2f8.pdfIn PDF document text
    • http://natasisenexu.22web.org/guidelines_aspen_2016_traduzido.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/fjekpzz/pinemekovotolive.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468843/normal_5fe02c303b4f9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4527747/normal_5fc7e4191f624.pdfIn PDF document text
    • https://deriwofapavuz.weebly.com/uploads/1/3/4/3/134311795/tigefaserikuzabokow.pdfIn PDF document text
    • https://cdn.sqhk.co/roratumopiv/AsBtWgj/michael_roberts_construction_inc.pdfIn PDF document text
    • http://sdfsdfsdf.shaketorch.com/ritufekoredalibuz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://folijurojavagig.epizy.com/esade_mba_employment_report_2017.pdfIn PDF document text
    • http://siberasule.rf.gd/gejonu.pdfIn PDF document text
    • http://dizakopalelur.epizy.com/bittorrent_er_for_windows_10.pdfIn PDF document text
    • http://xokifenutotumu.epizy.com/23383433792.pdfIn PDF document text
    • http://magonusu.epizy.com/halloween_worksheets_for_2nd_grade.pdfIn PDF document text
    • http://wafogaz.rf.gd/csr_annexure_in_word_format.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001065f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065F 5476 bytes
SHA-256: a2291d9b3bb8e3610a28b8b06f188cea2d858bad99bd9f80517217a87edfdcc5
font_01_sfnt_off000118ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118EE 12496 bytes
SHA-256: a5478344334bb22a65f3eed377992ad6a0af912e42bbeaf21a738d0ed0833a4e
font_02_sfnt_off00014284.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14284 16188 bytes
SHA-256: 1c21972213295716c57009881a4d197aabc0139ad6af1ca039c6d9e490a7bde6

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