Malicious PDF — malware analysis report

Static analysis result for SHA-256 075db62e536c17ff…

MALICIOUS

PDF

46.2 KB Created: 2020-08-14 07:28:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ebab72842b015ffb837bcadaa3609ca4 SHA-1: 16f4caa9521ceebe6ddc8e1649497c93a599320f SHA-256: 075db62e536c17ff2c4553870d6554db7ef8987c0adafbf59678028034071daa
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1204.002 Malicious Link

The PDF contains a lure for free Office 365, directing users to a malicious URL. It also includes a heuristic indicating a clipboard command execution lure, suggesting the user should copy and paste content into a shell. The presence of numerous embedded links, many pointing to PDF files, suggests a link farm or redirector strategy.

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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.ru/pify?keyword=and+activate+office+365+free
    • http://files.plan-my-trip.eu/uploads/1/3/1/3/131380485/vuvowizoxu.pdf
    • http://files.alloneocean.net/uploads/1/3/1/0/131070080/wafera.pdf
    • http://tewekuxox.tntkarateny.com/uploads/1/3/0/8/130814017/4373733.pdf
    • http://files.legacybuildershc.com/uploads/1/3/0/7/130739996/tavenakipusawawaveba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/8289/0912/files/mourning_ends_part_1.pdf
    • https://cdn.shopify.com/s/files/1/0453/3600/2715/files/performance_appraisal_form_filled_sample_excel.pdf
    • https://cdn.shopify.com/s/files/1/0431/5856/9128/files/86523909686.pdf
    • https://cdn.shopify.com/s/files/1/0454/7529/9478/files/alfonso_perez_daza.pdf
    • https://cdn.shopify.com/s/files/1/0432/7689/4372/files/japegirerusazuruzoko.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31443612403.pdf
    • https://cdn.shopify.com/s/files/1/0431/0433/8074/files/canevas_de_projet_agricole.pdf
    • https://cdn.shopify.com/s/files/1/0432/3239/5426/files/96987659941.pdf
    • https://cdn.shopify.com/s/files/1/0430/7353/6149/files/36594196106.pdf
    • https://cdn.shopify.com/s/files/1/0435/1633/0152/files/fagomujakejewanuriwi.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000072be.bin
152b2048f05bfc4f5f1dae9ab4eb74b5de7181103bd03e67f688cd959d084447		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72BE 5296 bytes
font_01_sfnt_off000084d3.bin
8abc3f3f48b87a00aef60a4da4ca2d83ad0d54c591cbd2016b932db210650acb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84D3 12232 bytes

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