Malicious PDF — malware analysis report

Static analysis result for SHA-256 0919b9dafbfe4c86…

MALICIOUS

PDF

188.8 KB Created: 2020-09-06 13:04:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c7608229f23220a8e7a5eaaa104286f SHA-1: 50bb5f54c75c7b32c9d4d93914e80414966484af SHA-256: 0919b9dafbfe4c86c08788564409af2718adbb6c2e97886e5db7a117138634b0
174 Risk Score

Malware Insights

MITRE ATT&CK
T1059.001 PowerShell T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a URL that redirects to a known malicious domain, indicating an attempt to download a payload. Heuristics indicate a lure to execute commands in a shell, likely to facilitate the execution of downloaded content. The ML classifier also flagged this PDF as malicious with high confidence.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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
  • 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://ttraff.cc/pify?keyword=busybox+for+android+2.+2
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/4999/2860/files/jolasidasasedotizudadusub.pdf
    • https://cdn.shopify.com/s/files/1/0429/5835/6639/files/7832063467.pdf
    • https://cdn.shopify.com/s/files/1/0438/3650/6272/files/pokutezujujapaz.pdf
    • https://cdn.shopify.com/s/files/1/0431/2216/3866/files/possessive_nouns_worksheets_for_6th_grade.pdf
    • https://cdn.shopify.com/s/files/1/0438/3372/0992/files/noliwilinobafuzizonolaw.pdf
    • https://cdn.shopify.com/s/files/1/0440/0575/2997/files/tuliruvamakabemine.pdf
    • https://cdn.shopify.com/s/files/1/0427/9664/6556/files/javascript_sort_array_of_numbers.pdf
    • https://cdn.shopify.com/s/files/1/0432/2941/3544/files/vexisakifinurobag.pdf
    • https://cdn.shopify.com/s/files/1/0432/1322/6139/files/sakejogunirixivagilun.pdf
    • https://cdn.shopify.com/s/files/1/0436/5228/4566/files/design_of_air_conditioning_systems.pdf
    • https://cdn.shopify.com/s/files/1/0431/7272/4900/files/laboratory_manual_in_physical_geology_answer_key.pdf
    • https://cdn.shopify.com/s/files/1/0434/9761/9621/files/zujinifizekemix.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00029480.bin
c1c1fd2f00151901b5494e4f60df723f0560f1f12a8e45250c25ea126a5fb02f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x29480 5076 bytes
font_01_sfnt_off0002a5ca.bin
578a30797268412e9eb719f7ae9ee8beca2657dcf2560ae59446dcba0a882fae		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2A5CA 15528 bytes
font_02_sfnt_off0002d74c.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x2D74C 4324 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.