Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e156468509ebb0c…

MALICIOUS

PDF

76.7 KB Created: 2021-04-14 10:41:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: c33e9835cb8775016b542e0c6b50fcb8 SHA-1: 94451bb789ab99eb3367de8143c608e003828c2e SHA-256: 2e156468509ebb0ce114e8f18aca2c19d598481b5e816f1f9164264d6523dd3d
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing operation. The document body, though heavily obfuscated, appears to be a lure related to a popular Christmas song, likely intended to trick users into visiting the embedded malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://soxebez.ru/strik?utm_term=what+is+the+most+popular+xmas+song+of+all+time PDF link annotation
    • https://giretalude.weebly.com/uploads/1/3/4/6/134677333/jujixav_vukaduf_xorimowuxoj.pdfIn PDF document text
    • http://dasiwujupuna.sportsontheweb.net/cell_biology_research_articles.pdfIn PDF document text
    • https://lulaxakopoto.weebly.com/uploads/1/3/4/3/134331182/gudajerevox.pdfIn PDF document text
    • https://subegudikowezi.weebly.com/uploads/1/3/4/4/134476363/305456.pdfIn PDF document text
    • http://lilubaxubaxulu.sportsontheweb.net/95062129589.pdfIn PDF document text
    • https://rebenanutizoder.weebly.com/uploads/1/3/4/7/134752372/7089557.pdfIn PDF document text
    • https://pulezigo.weebly.com/uploads/1/3/4/6/134600697/b5c531b5cf.pdfIn PDF document text
    • https://cdn.sqhk.co/gajamomol/heYgf81/split_small.pdfIn PDF document text
    • https://cdn.sqhk.co/solijisivono/EyiadfB/logo_de_royal_caribbean_international_international.pdfIn PDF document text
    • http://susekilimu.medianewsonline.com/anemia_en_nios_oms.pdfIn PDF document text
    • https://cdn.sqhk.co/jiliroba/jfcjaha/61588917036.pdfIn PDF document text
    • http://liwurivosopap.medianewsonline.com/97598178517.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://4bf641bf-117a-4913-931f-55e49063997f.filesusr.com/ugd/5befcb_14bfb1beee0f46e3bb1e18fb8d343752.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/bac0739a-324c-4ca2-90cd-5a17d103399c/spotted_lanternfly_excretes_honeydew.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/71249517-a35c-4bff-9aab-200cae8e8b36/the_summoning_book_trailer.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ce9c08d-61da-4826-8734-8ddee12514a1/merkury_wireless_earbuds_pairing.pdfIn PDF document text
    • https://9f2a6cc1-6e15-4467-beaa-57274ca996ed.filesusr.com/ugd/78f4c3_88c82b45d7bf4b8ebc86b843ea2c669d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nasitevu/61028637135.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29c21095-ab27-4b93-988e-e1fb311b7251/52878103796.pdfIn PDF document text
    • http://widepidaba.atwebpages.com/bepusajewimegebovenu.pdfIn PDF document text
    • https://s3.amazonaws.com/luramamelolem/brandon_lee_mother_and_sister.pdfIn PDF document text
    • https://9534cc33-30dc-483d-bed2-8d5691710d48.filesusr.com/ugd/3835dd_1268a5c3945648b0a04e195bf5dbaea7.pdf?index=trueIn PDF document text
    • https://efa91360-7c21-416c-9d60-3189e0beb381.filesusr.com/ugd/42ffc7_443975b4c01345cd85d55a6bfea606b1.pdf?index=trueIn 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_off0000edaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAF 5396 bytes
SHA-256: 7690baeccb5a51b8b62f5667c0277c65b71eddc3153f556bf3fa24f34175bddb
font_01_sfnt_off0000fff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFF3 11172 bytes
SHA-256: bc9cb95266d72ed313f0ad2bf8597ee932cebb6770c3f7673e3006ab29e9b62d