Malicious PDF — malware analysis report

Static analysis result for SHA-256 db805aacd8ff0ff7…

MALICIOUS

PDF

40.7 KB Created: 2020-10-28 09:57:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 91258e5c830d95973e651f8a7b8d8ed1 SHA-1: da83e421ab000bf7fa2700da5f53ac2c59d94563 SHA-256: db805aacd8ff0ff7d14c4af134c56948bf184bd73c9b00f27a32265d5fbb6186
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 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://ggtraff.ru/123?keyword=jeu+presidential+paintball In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393762/normal_5f93b1b0c0dab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f874b644aed8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367635/normal_5f8f47e50fb5d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_5f8a6ccac7e14.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366055/normal_5f8816e229d75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403531/normal_5f94c6a047724.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382952/normal_5f8b90c75f1ab.pdfIn PDF document text
    • https://jopalezaleloloj.weebly.com/uploads/1/3/1/3/131380469/nubirupa.pdfIn PDF document text
    • https://finiluxexolije.weebly.com/uploads/1/3/1/8/131856594/7041568.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376625/normal_5f941af34af3f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5f89a87dd07c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372972/normal_5f8e80e6a0bd2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/6729/9782/files/sniper_3d_gun_shooter_hack_game_apk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/0087/5173/files/depth_perception_psychology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/9516/9468/files/strategic_staffing_3rd_edition_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f81914f4-ff7e-463b-b74f-e91e97614473/36930904409.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01f23ad3-85a7-48d9-9279-1565d810abe3/gta_5_key_generator_steam.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005fb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB3 5080 bytes
SHA-256: cfb7db0454598202aba39decb11437e6dd60ddd880a674261476c969a4a7f46d
font_01_sfnt_off000070f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70F7 10792 bytes
SHA-256: f8115af44b313771a235dc857dfd94abe058c6edc8fc84e75b848ff6a99cc39b

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