Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a9aea957e79c027…

MALICIOUS

PDF

58.9 KB Created: 2020-07-15 17:35:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf9d1eb13b3508d9f83a2660ca7fba83 SHA-1: 36a6fb104a724672a4e7e4dcbf5735527bcfb12b SHA-256: 0a9aea957e79c0275d0352192499340834d4d8c643b2ee197147a6cfe469b6e5
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to external resources, with one specifically identified as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, suggests a lure related to 'colonisation of south africa pdf', likely to entice users to click the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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.com/pify?keyword=colonisation+of+south+africa+pdf
    • http://files.assetskill.com/uploads/1/3/0/7/130740563/lebalezafemukigagosi.pdf
    • http://files.intensiveengagement.com/uploads/1/3/1/4/131437603/1511084.pdf
    • http://files.bookhivebeerclub.com/uploads/1/3/0/9/130969910/f65beae6b726.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://sukimuweriva.files.wordpress.com/2020/06/18792336991.pdf
    • https://vifilajezuro.files.wordpress.com/2020/07/fanexaxerepalan.pdf
    • https://wenazedupome.files.wordpress.com/2020/07/23153508736.pdf
    • https://gopuzesi.files.wordpress.com/2020/06/16990132502.pdf
    • https://sojawoni.files.wordpress.com/2020/06/3313947488.pdf
    • https://sesuxegu.files.wordpress.com/2020/07/lodinojirobasebejaju.pdf
    • https://wewokonor.files.wordpress.com/2020/06/19504901958.pdf
    • https://nutuwuja.files.wordpress.com/2020/06/80226254400.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/84574839703.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/33505404904.pdf
    • https://cdn.shopify.com/s/files/1/0432/7315/8821/files/56221007755.pdf
    • https://cdn.shopify.com/s/files/1/0431/0820/4701/files/26621480618.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8914/files/85768482107.pdf
    • https://cdn.shopify.com/s/files/1/0428/5405/6092/files/xozokili.pdf
    • https://cdn.shopify.com/s/files/1/0433/9515/4070/files/weloloru.pdf
    • https://cdn.shopify.com/s/files/1/0433/7650/9080/files/fonorixova.pdf
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/84783800420.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_off0000a9e9.bin
41fa74e2c3af0b518a5691f0d8c5b5bd074ca4e8741c6cdb3adf163c09d3707c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA9E9 5028 bytes
font_01_sfnt_off0000baf0.bin
bd91f4c23906ec4bc59676b5a46f2aae38297b6d255a29e9901fc43c12495cd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBAF0 10408 bytes

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