Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c04002322f7fb38…

MALICIOUS

PDF

45.3 KB Created: 2020-10-08 21:52:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: e423e82e2219f286b7fbef6f5cf748a2 SHA-1: 0140c819d8cbe1552911e16177d84bb19f7df813 SHA-256: 9c04002322f7fb38d947507c2a36d0744736678f4777758605213bb7ff254aec
154 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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 0.9999

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://cctraff.ru/strik?keyword=battle+chess+game+of+kings+tm+hd+pc+gameplay In PDF document text
    • https://site-1039171.mozfiles.com/files/1039171/pevovuvewinadu.pdfIn PDF document text
    • https://site-1043090.mozfiles.com/files/1043090/65011643035.pdfIn PDF document text
    • https://site-1042783.mozfiles.com/files/1042783/5437219829.pdfIn PDF document text
    • https://site-1039783.mozfiles.com/files/1039783/62009588199.pdfIn PDF document text
    • https://site-1044020.mozfiles.com/files/1044020/rakemujorebikugasuzukaw.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://uploads.strikinglycdn.com/files/44d32d3e-bdd7-49da-bf86-5b56678be1aa/xifukitogemosakejududil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a7c00ba-77a1-4c7d-af2d-ec655b6a538c/dizojipatavunivi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d68bbb86-3529-4139-b9d6-787c84ea2802/kakalowotur.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4704/0662/files/narra_tree_flower.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9869/3022/files/jerinudesudusu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5254/5701/files/wodesuxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1686/5952/files/michael_vey_book_1.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/7187/5488/files/46258752741.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://scripts.sil.org/OFLIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C5 5688 bytes
SHA-256: 8e74ac2f17980e56c3f62a0457aef3b8ffc79e8d0cec1f34844fb680652f7e4d
font_01_sfnt_off0000780e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x780E 2736 bytes
SHA-256: d3a3d8ea2301178a7e52b0d5727f82020c17f88ac67089fd9b9bfdef31dae823
font_02_sfnt_off0000834f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x834F 11864 bytes
SHA-256: dbf9508313655b6776c22cea92cc39881c6cd1c7c159b0e81283df18e18d17b0

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