Malicious PDF — malware analysis report

Static analysis result for SHA-256 e5307c418dd86b35…

MALICIOUS

PDF

42.5 KB Created: 2020-11-08 00:21:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-01
MD5: 01f41e85696d23477011dda4a08405e2 SHA-1: aa675e0d3674ee413ef80fe7e408d0328c16be07 SHA-256: e5307c418dd86b359d0f406fc3045d8d8b0eadc04bd8e5da3b3c07ffe4e8d309
174 Risk Score

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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://traffking.ru/aws?keyword=online+game+websites+for+free In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_5f926cbacce42.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367277/normal_5f93a10aaba5e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375885/normal_5f920e9ed3b81.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365619/normal_5f9c0f89da5d6.pdfIn macro / runtime command snippet
    • https://cdn-cms.f-static.net/uploads/4368251/normal_5f8b5354bbe68.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/9eced4ce-9a8b-411d-91ac-b854d7578964/fixing_run_on_sentences_in_a_paragraph_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba8e2484-9e6c-4920-ba89-3eca107eb1fd/bloodborne_guide_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10e9ea5c-1e11-435e-9882-6e51e1e7b594/pebumepepegilur.pdfIn PDF document text
    • https://firijidu.files.wordpress.com/2020/11/phan_uu_chia_buon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d5d763b-e8a4-4c06-89b3-67fa8eac72c6/larekimazalukuri.pdfIn PDF document text
    • https://dusurujadexo.files.wordpress.com/2020/11/sgt_john_curley_live_pd.pdfIn PDF document text
    • https://nizowowe.files.wordpress.com/2020/11/midesifitir.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
    • https://nizowowe.files.wordpress.com/2020In macro / runtime command snippet
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68BF 5344 bytes
SHA-256: b7e4967596fae64f6b23ee969032cce4ed3c731062b4b177993f5533510c6745
font_01_sfnt_off00007aea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AEA 10092 bytes
SHA-256: c358a20aade13b741147560baa0cd0c026e6765c80e81eb7509ef145a8589f9e

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