Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea76050c43da19b0…

MALICIOUS

PDF

92.3 KB Created: 2021-03-09 19:06:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88bd48fa02d45bc53221e7cdccf7f182 SHA-1: d8c259893ae751cde0f8a9f2243eaa01c655e366 SHA-256: ea76050c43da19b0bc37ea386f01dd6a0693d42f8634d89cd315ef29a8313bfb
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, a common tactic for phishing or distributing further malware. The 'PDF_SEO_LINK_FARM' heuristic indicates a large number of links, and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests malicious intent. While no scripts were explicitly extracted, the presence of external links and the phishing classification point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://golowaki.ru/123?utm_term=cryptococcal+meningitis+guideline+2018
    • https://lesoloruvurer.weebly.com/uploads/1/3/6/0/136028926/5814449.pdf
    • https://kiwakobomu.weebly.com/uploads/1/3/1/4/131482833/1675759.pdf
    • http://infokurs.design/que_son_las_actividades_puntualesd3a03.pdf
    • http://idealslimitaly-ufficiale.site/fajugafijurapasalulju53l.pdf
    • https://jikowizovogowo.weebly.com/uploads/1/3/2/6/132682153/cdb60fdad.pdf
    • http://apsdd54gfv.xyz/how_to_solve_properties_of_exponents_with_variablesl6viu.pdf
    • https://lujajumivovun.weebly.com/uploads/1/3/0/7/130776132/6d775a6.pdf
    • http://sarhello.online/133001954640wxxx.pdf
    • https://famixarusefon.weebly.com/uploads/1/3/4/3/134396739/mijavosipi.pdf
    • https://pepajodik.weebly.com/uploads/1/3/1/4/131453945/eaed9.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/35972266-1726-4dc8-ad03-2aca6b5c0d23/kung_fu_panda_turtle_meme.pdf
    • https://uploads.strikinglycdn.com/files/aa0f74c9-fbe5-4742-b226-4ad0fb77cf16/48449901880.pdf
    • https://77da94c0-0f0a-445b-87af-e489a0b5ef66.filesusr.com/ugd/db1da1_0aec6e3887a6493e8c713969c56efdee.pdf?index=true
    • https://uploads.strikinglycdn.com/files/7f48677b-e096-4d62-90fc-fabadf4e0640/what_is_a_speech_preparation_outline.pdf
    • https://s3.amazonaws.com/wewiro/25422431352.pdf
    • https://s3.amazonaws.com/sogovekevi/dusuzuresapevokidatajote.pdf
    • https://uploads.strikinglycdn.com/files/062c9b22-916d-492f-a651-8e0f356f6c74/how_to_anoint_oil_poe.pdf
    • https://uploads.strikinglycdn.com/files/f80e1d9e-8c4c-41c1-8721-6e09f02b4135/pathfinder_kingdom_building_sheet.pdf
    • https://d99c26cc-8c68-456d-a039-1a26994c8d26.filesusr.com/ugd/105a8c_14bbf1c5773b4f07ac8afeea7f0f5142.pdf?index=true
    • https://s3.amazonaws.com/zuses/wibajatizoje.pdf
    • https://s3.amazonaws.com/ganubatebedoxez/zufizefiwakufotote.pdf
    • https://0dea665b-aaaa-42f3-a52c-f86f0fd1efa2.filesusr.com/ugd/8b9728_f114bcd11dfb4a2c828a78da2b613e31.pdf?index=true
    • 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_off000118c4.bin
85c4be024cf790abf013fc85e94c23371bfb7f9336eff289901480816e81b08a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118C4 5920 bytes
font_01_sfnt_off00012cd7.bin
c5b5ad738460b03ab83fdfc5d3715175079d3700bc4560f89675f44ef084ac2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CD7 12740 bytes
font_02_sfnt_off0001558e.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1558E 4324 bytes

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