Malicious PDF — malware analysis report

Static analysis result for SHA-256 67233e16e1ab6c9c…

MALICIOUS

PDF

84.4 KB Created: 2020-08-09 09:43:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c9c06fd4f604a7e435a6eecb433175df SHA-1: e1f96a833f929c8d746928fc5517e53e5db5d4eb SHA-256: 67233e16e1ab6c9cca9ae0ab2d1c321217e27e14689f8153e3c096a9ff8d0a1e
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, with one identified as a redirector to malicious infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be a lure for a tutorial, suggesting a phishing or scam attempt. The presence of a download button heuristic further supports this, indicating the document is designed to trick users into downloading or clicking malicious links.

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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=adobe+after+effects+tutorial+in+tamil+pdf
    • http://files.kenyatyson.com/uploads/1/3/1/4/131407802/jutude_sugedim_metob_tavometalevem.pdf
    • http://files.adenforlions.com/uploads/1/3/1/3/131384025/7287707.pdf
    • http://files.betheone.co/uploads/1/3/0/7/130740175/1369760.pdf
    • http://zapax.teakslockservice.com/uploads/1/3/1/4/131482975/c62a883.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/8133/4933/files/lilezobukeneralusunilag.pdf
    • https://cdn.shopify.com/s/files/1/0436/5480/7717/files/vizosabateguva.pdf
    • https://cdn.shopify.com/s/files/1/0448/4002/6273/files/synonyms_and_antonyms_list_for_bank_po_exam.pdf
    • https://cdn.shopify.com/s/files/1/0434/9739/0244/files/49715117894.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/79263282342.pdf
    • https://cdn.shopify.com/s/files/1/0432/5956/0086/files/xadobabakuvawadaxututopa.pdf
    • https://cdn.shopify.com/s/files/1/0429/7555/9829/files/kodilujojidowaxe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wetitoditasenubekuxon.pdf
    • https://cdn.shopify.com/s/files/1/0428/0736/1703/files/21949575492.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53522836856.pdf
    • https://cdn.shopify.com/s/files/1/0435/9720/1576/files/beps_action_11.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • https://savannah.gnu.org/projects/freefont/
    • http://www.gnu.org/licenses/
    • http://www.gnu.org/copyleft/gpl.html
    • http://scripts.sil.org/OFL

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_007_off000125bc.bin
dc6bdc33b9a3938124c6e23cf65235d9d7ac07a07ab3721104d6c16992427f37		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x125BC 18512 bytes
font_00_sfnt_off0000b8df.bin
4257dcd81db8c253e1d608b4d266c88f4ef4d675658bd0b45a223429d29f08d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB8DF 6644 bytes
font_01_sfnt_off0000c994.bin
43103c5011336e18789d13adb5c4d8dc035f3327a45b9419bda59d979f90dceb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC994 5432 bytes
font_02_sfnt_off0000dbec.bin
2da6669dc5f83d8a9979c6a18f60bd7943f7aad72eb540089f9e54aa3ad2202d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBEC 9776 bytes
font_03_sfnt_off0000fda4.bin
41e4060b5b7e30e2a6079d0c62a4c19245d4b0b78eeb6fe3c6036ccbe41f35c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA4 11668 bytes

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