Malicious PDF — malware analysis report

Static analysis result for SHA-256 118ba532cbad1c0e…

MALICIOUS

PDF

103.6 KB Created: 2021-05-05 20:57:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: d9ae5580399c2f7d460d6b5e839f64ff SHA-1: 3e36d23c0ca8ff3e33c7fa7ab500fb731f3720cf SHA-256: 118ba532cbad1c0e7fdba17ff62a8db2dada3a4a4160fd78bfd30d08f3d64e3a
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs that point to other PDF documents hosted on various domains. The primary URL, 'https://seumenha.ru/strik?utm_term=the+end+of+the+world+billie+eilish', suggests a potential lure or phishing attempt. The structure indicates a tactic to distribute malicious content through a chain of linked documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://seumenha.ru/strik?utm_term=the+end+of+the+world+billie+eilish PDF link annotation
    • http://uspeh.icu/475882629029iv1r.pdfIn PDF document text
    • http://vekisonoloze.sportsontheweb.net/what_child_is_this_sheet_music_voice.pdfIn PDF document text
    • https://zajefogana.weebly.com/uploads/1/3/1/4/131407312/4957069d3.pdfIn PDF document text
    • https://jesomufufasak.weebly.com/uploads/1/3/1/8/131872286/2666917.pdfIn PDF document text
    • http://zazorin.scienceontheweb.net/76458475381.pdfIn PDF document text
    • https://zerebutaravuna.weebly.com/uploads/1/3/5/9/135965874/0641b9204.pdfIn PDF document text
    • http://jatudoz.getenjoyment.net/ocr_a_level_biology_notes.pdfIn PDF document text
    • http://neridofufuleteg.scienceontheweb.net/17482835696.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/engineering_drawing_tools.pdfIn PDF document text
    • https://vepemetamat.weebly.com/uploads/1/3/4/3/134354227/meluredolobul.pdfIn PDF document text
    • http://pagavopalubutu.scienceontheweb.net/pioneer_elite_television_speakers.pdfIn PDF document text
    • http://sokolov.fun/react_website_templates_free_github64r1a.pdfIn PDF document text
    • https://visorupa.weebly.com/uploads/1/3/5/3/135305290/feafb91291be1.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a9b72ff8-ed6f-4212-96c6-d467cc4e2332.filesusr.com/ugd/7f5649_87e316f9d0c941d9897aef6b737c1ca6.pdf?index=trueIn PDF document text
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_80a541869f924d20930437f64a42712f.pdf?index=trueIn PDF document text
    • https://46c0acaa-de7d-4f46-84f0-c2cf1d8ff7d9.filesusr.com/ugd/ac1638_dd573c7cd9574573a4b6b98489221842.pdf?index=trueIn PDF document text
    • https://ad0d0dbb-669b-46a9-85df-79487014a0f3.filesusr.com/ugd/00d95d_189ff514266b4e4289637bd7098d503c.pdf?index=trueIn PDF document text
    • https://0fe83ef2-ed6b-4f04-a52d-31fe3c58d8d1.filesusr.com/ugd/ade4e6_5e2dd30f464e49188c628075a0e2272b.pdf?index=trueIn PDF document text
    • https://6440a9f6-5e82-4153-977b-4ffe9374ec4a.filesusr.com/ugd/7182f3_09445bdb815f4a10a076f4a55d4b4c08.pdf?index=trueIn PDF document text
    • http://sagoralezerelo.onlinewebshop.net/geniworugulonokifu.pdfIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_75de2b04069f467183a751032d10ec1d.pdf?index=trueIn PDF document text
    • http://xifimerin.onlinewebshop.net/malayalam_bible_study_notes.pdfIn PDF document text
    • https://77ac2d45-d533-4b4b-a85c-01e81860bff9.filesusr.com/ugd/7f1ad7_3a4e04920535461fa5abc9b661e18a8c.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e782.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE782 37768 bytes
SHA-256: e001856a1989fadd53aeb0fcc84059d10a859f35c337a86ed220b13ee9bdef20
font_01_sfnt_off00015b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B4D 4968 bytes
SHA-256: 9a5d3cbe2c3eb2f291242cbc709a66067f3d6494ac94ee830d97c9441d881afc
font_02_sfnt_off00016c41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16C41 10988 bytes
SHA-256: a1fbb43d785221151bcdb2e22115f80dce2af203358d4abc7e14118749fb5944

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