Malicious PDF — malware analysis report

Static analysis result for SHA-256 06be73161bd33468…

MALICIOUS

PDF

46.0 KB Created: 2020-11-02 09:31:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 034418cad6db82a8e6a4bbde7674bb49 SHA-1: 94a6a139f2101882933e23f9cf831a17963c7faa SHA-256: 06be73161bd334681ae5b29af06cc978779cccdc24ff1f0c99ac8a117fcf2f62
132 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded links and a visual download button lure, directing users to a malicious redirector URL. The document body, though heavily obfuscated, contains references to the malicious URL and a link farm structure, indicating a phishing or malware distribution attempt. The ML classifier strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ttraff.cc/123?keyword=best+apk+downloads+for+firestick In PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/bagar.pdfIn PDF document text
    • https://juporolo.weebly.com/uploads/1/3/1/3/131380745/juxolugogux_jelemusozujo_nonefof_vuselufen.pdfIn PDF document text
    • https://nukevokisoget.weebly.com/uploads/1/3/2/7/132711970/1637570.pdfIn PDF document text
    • https://bipikive.weebly.com/uploads/1/3/4/3/134342269/mubufisiwapupu_zofigunoluw_pagadatim.pdfIn PDF document text
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/3934222.pdfIn PDF document text
    • https://sozipufejelaj.weebly.com/uploads/1/3/4/3/134352325/xipoxako.pdfIn PDF document text
    • https://kesolijizik.weebly.com/uploads/1/3/4/2/134265964/ab664924492036b.pdfIn PDF document text
    • https://zisokilusativ.weebly.com/uploads/1/3/2/3/132303079/dozojed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368752/normal_5f9f3915be9ac.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373749/normal_5f891e39da0c7.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/7b1840ff-2e01-4743-8d71-b5b9b622ed12/tokitumubiluwagoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e0f49418-b605-499c-9d37-311623d1bc62/kedafazibikubawupalumip.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cded2085-2fcf-47bf-8bde-0b13015ec999/australian_key_blank_conversion_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96fd7788-34d1-4624-b150-e74417bfc201/32944200324.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47ad2da7-2d4a-4d1c-9242-fe4a462abe1a/zajiniz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/721a0847-f881-4c1a-95df-dc68679adf7d/transformation_digitale_l_avnement_des_plateformes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/677591e4-b43b-4a25-ba22-025674b0b1b0/jefemoxivojevupowal.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_off000071b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71B6 5356 bytes
SHA-256: 747b4dbbd61f2913c537e42479210e60e282db49abc2dd52d5df9e1a33b9916c
font_01_sfnt_off00008418.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8418 11284 bytes
SHA-256: 10d7aecb3ef0124faf2194360887ccea6c5bd3b206bc50acd537786d4c00c25f

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