Malicious PDF — malware analysis report

Static analysis result for SHA-256 12c58cded5216eea…

MALICIOUS

PDF

32.1 KB Created: 2020-08-06 02:57:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 81147634888ea575359f686b02398798 SHA-1: 535f0bc6c92f430a50eb60fed296b013e34aefb8 SHA-256: 12c58cded5216eea7e97ac2b4f377bcfa41224081cecd6f1931bfddd019b26c4
194 Risk Score

Malware Insights

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

The PDF contains a lure for a popular book, directing users to click a link that leads to a known malicious redirector. The heuristic 'SE_BROWSER_INSTALL_LURE' indicates the document's content is designed to trick users into installing something or visiting a malicious site. The presence of numerous external links, including one to a malicious redirector, suggests an attempt to drive traffic to potentially harmful content or phishing pages.

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.ru/pify?keyword=wings+of+fire+book+in+telugu+pdf+download
    • http://files.winnipegcrimestoppers.org/uploads/1/3/0/7/130775652/1237594.pdf
    • http://files.stellalunamediamusic.com/uploads/1/3/0/7/130776312/3306562.pdf
    • http://files.thedaimlerxjcollection.com/uploads/1/3/1/4/131453252/domenigapopite-lisujutoneg-tuwep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0438/1645/2258/files/34380295056.pdf
    • https://cdn.shopify.com/s/files/1/0443/6181/0076/files/bmat_past_papers_worked_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0434/1330/7541/files/archegoniate_book.pdf
    • https://cdn.shopify.com/s/files/1/0434/0455/8488/files/change_keyboard_language.pdf
    • https://cdn.shopify.com/s/files/1/0432/7030/7995/files/80688861477.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/vukabejojizixonanumijafuj.pdf
    • https://cdn.shopify.com/s/files/1/0433/9964/3297/files/61572672337.pdf
    • https://cdn.shopify.com/s/files/1/0437/0831/7850/files/84285925507.pdf
    • https://cdn.shopify.com/s/files/1/0433/5376/8095/files/pigimuminewadi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5351/3894/files/rusagiwujuxugokobog.pdf
    • https://cdn.shopify.com/s/files/1/0430/3188/8035/files/17626811004.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_off000042c3.bin
bef0ac7dac0734a565710c9659e101c7fec3cc74a9c04fe1e331e3ec17b104c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x42C3 5516 bytes
font_01_sfnt_off000055b0.bin
f1d3e4619173e2dbdc0dda63b52d4c7beaecb5798d503162c83106ae1a2e0cc6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x55B0 8700 bytes

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