Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5a61379e0664d96…

MALICIOUS

PDF

43.7 KB Created: 2020-11-05 18:50:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 965cb648f16aa0c365b61bf08ba766de SHA-1: 7c6fdfae7b7bdb22739ccdb3b62f75df1177ef0c SHA-256: b5a61379e0664d96cbaea33663ff909784230f1242da92ce09e304e442fde1b4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.001 PowerShell

This PDF file is identified as malicious by an ML classifier and contains a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a 'Phoenix project pdf free'. Crucially, a heuristic indicates the document instructs the user to copy and paste content into a command-line context, suggesting an attempt to trick the user into executing a second-stage payload. The numerous embedded URLs point to disposable hosting, further indicating a malicious intent to distribute malware.

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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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.
  • 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://gettraff.ru/aws?keyword=phoenix+project+pdf+free In PDF document text
    • https://luvumape.weebly.com/uploads/1/3/4/4/134438520/jotovov_bobiwikaxemar_nitosolivix_sikola.pdfIn PDF document text
    • https://geligike.weebly.com/uploads/1/3/4/5/134590657/4431016.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416928/normal_5f9b3b2198763.pdfIn PDF document text
    • https://dejolezeg.weebly.com/uploads/1/3/2/8/132815968/08d5bb109.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366357/normal_5f8b66738ab4e.pdfIn PDF document text
    • https://warasogufav.weebly.com/uploads/1/3/4/4/134440103/5921136.pdfIn PDF document text
    • https://fawurefo.weebly.com/uploads/1/3/4/4/134441885/sodujewemov.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378641/normal_5f9d27d8c03d9.pdfIn PDF document text
    • https://nudojafobedem.weebly.com/uploads/1/3/1/3/131379550/6363393.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/025ca856-8851-4c59-a104-7baabad6c24c/44408429939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/595fec63-3da0-4afb-b44c-e7b2b0682667/22717326908.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/721850d6-9461-414a-bdeb-016103b8726b/zombie_108_full_movie_online_free.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_off00006cef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CEF 4968 bytes
SHA-256: a86ea0e6b848e4960898aa9fe7cdf71ef5ce7948d1784414703e6c3f0e5e6900
font_01_sfnt_off00007de1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DE1 10740 bytes
SHA-256: 9392d85a0c4a0e4788661ea114b1a6e34231371288972693f6e6990b4de9b85b

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