Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b7522d4ce377237…

MALICIOUS

PDF

71.0 KB Created: 2020-12-17 01:05:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 126e6235b1d58ae7b1174eb2a2bacb58 SHA-1: 908356066e88b69083510a742bc5ff0234ae5128 SHA-256: 6b7522d4ce377237f42f084509901bf1a8f35c7bd6e137c9df47c1c4cfeba17f
156 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_LINK_FARM' indicates the presence of a large number of external links, with 'https://traffnew.ru/strik?utm_term=el+dia+que+me+quieras+letra' and 'https://dizakevusarebiz.weebly.com/uploads/1/3/4/5/134581037/5566597.pdf' being prominent examples. This suggests the document is designed to redirect users to potentially harmful websites, possibly for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffnew.ru/strik?utm_term=el+dia+que+me+quieras+letra
    • https://dizakevusarebiz.weebly.com/uploads/1/3/4/5/134581037/5566597.pdf
    • https://cdn-cms.f-static.net/uploads/4388824/normal_5f9b071e4cd95.pdf
    • https://cdn-cms.f-static.net/uploads/4388815/normal_5f8e8ed2479a7.pdf
    • https://cdn-cms.f-static.net/uploads/4369501/normal_5fab00a20a70d.pdf
    • https://cdn-cms.f-static.net/uploads/4490377/normal_5fd68bcacef5c.pdf
    • https://static.s123-cdn-static.com/uploads/4466166/normal_5fcabbf664e7d.pdf
    • https://cdn-cms.f-static.net/uploads/4366045/normal_5fd896a390203.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc3963c12facd59cebdd614/t/5fcc7a7f978da30c56f68a0b/1607236224306/7025386552.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbf591feaf37e3b6493011e/1606375712368/nagewufezo.pdf
    • https://static1.squarespace.com/static/5fc1162b68612547ed5f39f0/t/5fc35889f81c9a2a0c0cea4a/1606637705805/15844862471.pdf
    • https://uploads.strikinglycdn.com/files/c8b2bf94-b29f-459f-a481-1a32a5e43369/8328397313.pdf
    • https://uploads.strikinglycdn.com/files/f8a205a1-44bb-4a8c-8ade-eb150465189b/parts_of_a_fish_worksheet_for_preschoolers.pdf
    • https://uploads.strikinglycdn.com/files/4de3e5e0-a0d4-4a7b-907a-95369b8723bc/xebumuteko.pdf
    • https://static1.squarespace.com/static/5fc530712e537a05ef24fe6b/t/5fd1cb677c12252903f4a3d8/1607584616684/bubble_shooter_crack_pc_offline.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cbba.bin
134a62dacf09ac444f52787fd35fad30bed26dabfccd7b331d3e3a439fe5a9b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBBA 3056 bytes
font_01_sfnt_off0000d6b6.bin
b0ed489b10e132d4eb1c4b399074e6e6211e8d74419c51a3afe88bf0b93e15a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B6 5052 bytes
font_02_sfnt_off0000e7ca.bin
5709553c58e7f751192e993b0bce11f924af0b4ffb4bc775cc2f8741b397e09f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CA 11472 bytes

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