Malicious PDF — malware analysis report

Static analysis result for SHA-256 560fd2f09d8698e1…

MALICIOUS

PDF

82.8 KB Created: 2021-03-20 18:37:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 361120fb704403df2cd87f06b1c94583 SHA-1: b5009e905b0a363623bf1e1640996cffe2560292 SHA-256: 560fd2f09d8698e1cdee7fe0f2d56b9abf870d90772a8334a1a83317cc859d3c
96 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to other PDF documents, indicating a link farm or SEO manipulation scheme. One of the primary external links directs to a URL that appears to be a lure for 'gospel music ringtones for mobile phones', but the overall structure suggests a malicious intent to redirect users to potentially harmful content or exploit SEO vulnerabilities. No scripts were extracted, but the PDF structure itself is indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • 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://leonvi.ru/wix?keyword=gospel+music+ringtones+for+mobile+phones
    • https://damasidegiked.weebly.com/uploads/1/3/1/4/131411688/9520399.pdf
    • https://wosufixojiniki.weebly.com/uploads/1/3/4/7/134720754/6297928.pdf
    • https://nuvugokub.weebly.com/uploads/1/3/4/0/134016684/fde97dcc7b81d8.pdf
    • https://dapunilak.weebly.com/uploads/1/3/4/5/134506399/radibif_lonemup_wibak_pepujogeroze.pdf
    • http://jipetabonitu.mywebcommunity.org/50112469084.pdf
    • http://vawurabel.mygamesonline.org/cuisinart_toaster_oven_troubleshooting.pdf
    • https://gobezovix.weebly.com/uploads/1/3/1/4/131454522/5066676d35d4d3.pdf
    • https://xozisimoxu.weebly.com/uploads/1/3/1/1/131164350/loruxotetol.pdf
    • https://static.s123-cdn-static.com/uploads/4386079/normal_5fe5890bce6ec.pdf
    • https://rubopawine.weebly.com/uploads/1/3/1/0/131070645/4417630.pdf
    • https://cdn-cms.f-static.net/uploads/4387230/normal_6037fa17aaee6.pdf
    • https://kozowesojufeg.weebly.com/uploads/1/3/4/7/134717080/4375722.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/445b5feb-794f-4e9c-b55e-bf258bf78fa3/how_does_johns_revelation_connect_to_genesis.pdf
    • https://0e75ab8e-f6a1-4360-bef2-1d94e06fde4e.filesusr.com/ugd/c0518c_9ce7dad179dd4e758f1da45cb2083952.pdf?index=true
    • https://uploads.strikinglycdn.com/files/2779f4e5-fdd2-418b-bc5a-9962457b7731/wewofetibutipujut.pdf
    • https://ac09d6fb-20d1-47e2-97cb-2568fc137cdf.filesusr.com/ugd/03dcd4_1807a070e2404c7e867bb13a3e2c84d9.pdf?index=true
    • https://67536400-2f23-40e2-9d3a-36ae3f4dfb8c.filesusr.com/ugd/5312ea_a5621d1f43f043cc80223f88dc5e7f62.pdf?index=true
    • https://6997f972-013f-4c6f-ac95-4179ba17a557.filesusr.com/ugd/549e1a_0450a5e6b01d4dc3a75f9161c9b330f0.pdf?index=true
    • http://goxafebo.myartsonline.com/vertebrate_zoology_books_free_download.pdf
    • https://uploads.strikinglycdn.com/files/279f5f6b-86e8-45d5-a0d6-e0f207810858/whats_another_word_for_the_end_is_nigh.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010538.bin
8b0fea16513055e0bbdc98de0cd37ad8420ea439196fc8e33db72bbafbea8b4d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10538 5392 bytes
font_01_sfnt_off0001176e.bin
634f3500c1879eb7998b967ee9d73f8fce2fb71f4326c184d0a6cb1f55ac03e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1176E 11304 bytes

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