Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d3d9603680456a2…

MALICIOUS

PDF

69.3 KB Created: 2020-08-15 08:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c602b25a4b5d1e54758ee56a13dc33d2 SHA-1: 087cb41e9447b18bb27540a4c61a191075020541 SHA-256: 0d3d9603680456a2cdc44ea7c011160028d01c1b3b56cf77be0cea3a4e095e9b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links, including one pointing to a known malicious redirector. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document attempts to trick the user into installing a browser extension or update. The presence of embedded URLs and the ML classification strongly suggest malicious intent, likely to facilitate further compromise or credential theft.

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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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=vsphere+6.+5+u3
    • http://files.trnsetters.com/uploads/1/3/1/0/131071166/rewegijowonaru.pdf
    • http://files.cheapskatesclub.net/uploads/1/3/1/0/131070367/117a49ef3039.pdf
    • http://files.johnholladayart.com/uploads/1/3/1/4/131453249/favikane.pdf
    • http://files.saveekuriforest.com/uploads/1/3/1/3/131383791/bijiselifivino_winaw_jaxobuwu.pdf
    • http://files.andrologyamerica.org/uploads/1/3/1/0/131069869/kaziwokes_juzava.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/67142307476.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/34680977850.pdf
    • https://cdn.shopify.com/s/files/1/0428/8135/1839/files/electrical_technology_by_bl_theraja_vol_2_download.pdf
    • https://cdn.shopify.com/s/files/1/0427/9602/3975/files/latex_beamer_templates.pdf
    • https://cdn.shopify.com/s/files/1/0432/9105/0137/files/44423914348.pdf
    • https://cdn.shopify.com/s/files/1/0431/8317/7885/files/nomimujifolatotuveti.pdf
    • https://cdn.shopify.com/s/files/1/0431/9114/0510/files/maruzizavumorumoseko.pdf
    • https://cdn.shopify.com/s/files/1/0434/2464/5272/files/ipl_2020_schedule_full_match.pdf
    • https://cdn.shopify.com/s/files/1/0431/5866/7430/files/xavodo.pdf
    • https://cdn.shopify.com/s/files/1/0428/6640/9639/files/walokakigamumiritifedivaj.pdf
    • https://cdn.shopify.com/s/files/1/0437/4819/6506/files/acidimetry_and_alkalimetry_titration_in_non_aqueous_titration.pdf
    • https://cdn.shopify.com/s/files/1/0429/2139/4343/files/public_finance_n6_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0435/4637/8404/files/tijikutejujo.pdf
    • https://cdn.shopify.com/s/files/1/0435/7780/2911/files/jofenufurumotisogisesabew.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_off0000c13b.bin
5057a4b6dbf73b51e1a29832113247a96f05c16627fb65f9a0d460949e1025ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC13B 4640 bytes
font_01_sfnt_off0000d10c.bin
1ba487bd543e06c1a519478b6e866430d2a786eb31fc2f3328ab9f6d562b39b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD10C 12544 bytes
font_02_sfnt_off0000f9c7.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C7 4324 bytes

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