Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eace8e84ecca266…

MALICIOUS

PDF

51.2 KB Created: 2020-11-07 04:09:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 4140bfec120894b52dd8fa7030224b32 SHA-1: 1dbff1459113dac8260ff65eb19883d312fbcfdd SHA-256: 1eace8e84ecca266dc12ac443773224614e92999e6d475565375817b838149e6
74 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicate it functions as a link farm, with one URL pointing to a suspicious domain. The ML classifier strongly flagged this PDF as malicious, suggesting it's designed to trick users into downloading further content. The presence of a call-to-action phrase reinforces the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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
  • 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://trafffi.ru/123?keyword=p90x+worksheets+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4392444/normal_5f8e16737e1c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5f8d9decdd808.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417306/normal_5f9f1952d47f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379733/normal_5f97bc7458481.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368497/normal_5f87df9c76cf7.pdfIn PDF document text
    • https://damijuvik.weebly.com/uploads/1/3/1/3/131381376/5069218.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392457/normal_5f9ef798d44f5.pdfIn PDF document text
    • https://foruvojupizife.weebly.com/uploads/1/3/4/3/134352799/6418796.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377933/normal_5f90859681988.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://saridejawe.files.wordpress.com/2020/11/wegujobijapifuzori.pdfIn PDF document text
    • https://tevarew.files.wordpress.com/2020/11/88608638079.pdfIn PDF document text
    • https://zenomanotape.files.wordpress.com/2020/11/peter_weiss_the_investigation.pdfIn PDF document text
    • https://nevosaxovib.files.wordpress.com/2020/11/vuvemi.pdfIn PDF document text
    • https://guwuwiro.files.wordpress.com/2020/11/lidox.pdfIn PDF document text
    • https://lulukevonifu.files.wordpress.com/2020/11/damonps2_ps2_pro_apk_latest_version_revdl.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000707d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x707D 5044 bytes
SHA-256: 5a86b105f664193c1336f2a84ce7333e44c8a557899a99adf07c5d221fcdcea5
font_01_sfnt_off000081b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x81B9 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00008a47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A47 11448 bytes
SHA-256: dc713a2b1aaee097de6a764e8be4539aede9b2effb9b9f858eebd3f79e325d3f
font_03_sfnt_off0000b114.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB114 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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