Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b87114090100f88…

MALICIOUS

PDF

56.9 KB Created: 2020-10-05 12:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 6e40b8ce72f556a20d99f04343e3f051 SHA-1: d5a5c4009030222f5fddcbd3a7eaa06203aa4392 SHA-256: 4b87114090100f88e8d08c0b994f840783c1b4f6407aa200ab74e738f52367ec
124 Risk Score

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 is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://cctraff.ru/strik?keyword=khilafat+and+non+cooperation+movement+pdf In PDF document text
    • https://site-1036722.mozfiles.com/files/1036722/taruxivew.pdfIn PDF document text
    • https://site-1037141.mozfiles.com/files/1037141/35433666915.pdfIn PDF document text
    • https://site-1039405.mozfiles.com/files/1039405/405311527.pdfIn PDF document text
    • https://site-1042590.mozfiles.com/files/1042590/33001337045.pdfIn PDF document text
    • http://files.your-gal-friday.com/uploads/1/3/0/8/130814397/dugedifipuk.pdfIn PDF document text
    • http://kifiti.revelinclay.com/uploads/1/3/1/4/131408024/2053516.pdfIn PDF document text
    • http://files.tcfdiopa.org/uploads/1/3/2/6/132681477/7fb2ef83e250f3d.pdfIn PDF document text
    • http://files.goodshepherdyouth.net/uploads/1/3/0/7/130739379/7647633.pdfIn PDF document text
    • https://site-1039150.mozfiles.com/files/1039150/83355505478.pdfIn PDF document text
    • https://site-1040250.mozfiles.com/files/1040250/nawaxetatasutinogodovabe.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006be3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BE3 5036 bytes
SHA-256: aa99c9423179e207234282bfeeeb0722adcc31da60a1016f5dbd6d42effb93f7
font_01_sfnt_off00007cd1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CD1 14380 bytes
SHA-256: c12aa50764d9c20311e0d225b9c3bc98987bef57fdd624f6bbd9ad8b949eae92
font_02_sfnt_off0000a96f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA96F 18192 bytes
SHA-256: 3b50789a856047fe1c55846a51bdbd147b4f6de8e1140f70cd2e81c840cf40ae
font_03_sfnt_off0000c5db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC5DB 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176