Malicious PDF — malware analysis report

Static analysis result for SHA-256 96023e4940926e17…

MALICIOUS

PDF

57.3 KB Created: 2020-11-03 13:41:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 87d5f64f94324ec19bb8417c64ad4be9 SHA-1: dcd6aad56e50f71b57dd035a5290316b8a92ebc2 SHA-256: 96023e4940926e17632bec107e976adaec1217d3d688ae2f1413348428e3960c
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

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.
  • 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=unblocked+games+shooting+hacked In PDF document text
    • https://cdn-cms.f-static.net/uploads/4382196/normal_5f8eea931ba81.pdfIn PDF document text
    • https://lobakazuperowe.weebly.com/uploads/1/3/4/3/134352895/juworufaketeg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378175/normal_5f8af41dbee4e.pdfIn PDF document text
    • https://papazutizo.weebly.com/uploads/1/3/4/4/134467207/nepoxuduzudarifiv.pdfIn PDF document text
    • https://fevuxutub.weebly.com/uploads/1/3/4/1/134131759/pojezefukawoki.pdfIn PDF document text
    • https://jeponiruwapin.weebly.com/uploads/1/3/0/7/130776483/6931524.pdfIn PDF document text
    • https://komanibinepo.weebly.com/uploads/1/3/4/5/134588578/bbde21ed6.pdfIn PDF document text
    • https://tegugozitofo.weebly.com/uploads/1/3/0/8/130874592/zomedut_vorafegapes.pdfIn PDF document text
    • https://muvisodujop.weebly.com/uploads/1/3/4/3/134358588/2fc17eba3fd5f4.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
    • https://uploads.strikinglycdn.com/files/5d280727-6af5-417c-9be4-481cf8a7c6c1/xumin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1996c5c-d6d4-41f2-b7b8-f23d6e51ee05/9052224265.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72afc3db-7e9d-4dfc-a74e-de6c593f12a0/chemistry_structure_and_properties_2nd_edition_by_nivaldo_j._tro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a5180d7-d5c9-4f53-9aef-60322017118b/bejawovuf.pdfIn 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_off00007a6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A6A 5240 bytes
SHA-256: d2766a23b1b77347781a73f01ba67de11ddc4875e62c17905ae2ce344a6fef8c
font_01_sfnt_off00008c0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C0B 12876 bytes
SHA-256: 737999983c53404a9fa48bbb1e3eef89be3bff1c11067f137895da6d409e71a1
font_02_sfnt_off0000b41f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB41F 16376 bytes
SHA-256: 062bdcb1ebc5aefee303d78cd62f54adf1dc70d3eb50a1d9e25c71e14035b5a9
font_03_sfnt_off0000ca04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA04 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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