Malicious PDF — malware analysis report

Static analysis result for SHA-256 514c42c4b855ffe0…

MALICIOUS

PDF

75.1 KB Created: 2021-03-20 19:23:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 0ea57edeb2c4bf5d3cff4d72389fda57 SHA-1: 5aaa4b61db84957499a30806cd4637074e3761f7 SHA-256: 514c42c4b855ffe06eeb10092fc4b931c3fbdb484e05f96e4c533b5ae76bea49
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/award?keyword=calendario+scolastico+2020+19+pdf PDF link annotation
    • https://cdn.sqhk.co/reromiwo/e6axTic/mortal_kombat_11_aftermath_characters_fatalities.pdfIn PDF document text
    • https://cdn.sqhk.co/mifijizudi/gej9ghJ/wumuvanibilusilufam.pdfIn PDF document text
    • https://cdn.sqhk.co/vimewiki/7icjdjb/xedilojuvavoganezajubena.pdfIn PDF document text
    • https://cdn.sqhk.co/mivadunoxo/gco78ij/13456528239.pdfIn PDF document text
    • https://cdn.sqhk.co/vuxesojogugu/hiaCjbb/kuvif.pdfIn PDF document text
    • https://rusaxexuratibu.weebly.com/uploads/1/3/2/6/132680860/e7b94c20431791a.pdfIn PDF document text
    • https://kadefevexenikoz.weebly.com/uploads/1/3/0/8/130813118/kezonetusotup-risuwatuvep-wivoxazizan.pdfIn PDF document text
    • http://tarekupi.scienceontheweb.net/strength_of_materials_objective_questions.pdfIn PDF document text
    • https://cdn.sqhk.co/jogeguzotire/nAifhho/best_shows_on_netflix_for_tweens.pdfIn PDF document text
    • https://cdn.sqhk.co/rujiwujik/dtgdgeE/retawewuwob.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cc67bef4-e22e-42fd-bf01-3f02b15f800b.filesusr.com/ugd/080020_331fc3161e78490f85f64f81ac74dcc4.pdf?index=trueIn PDF document text
    • https://d7ae471b-a447-437d-81b4-4e603f8679d9.filesusr.com/ugd/0a3240_874c0dce0de8482993e51a211508c646.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dded78cc-fecd-4b42-a921-31e088a8d421/how_to_set_car_alarm_sensitivity.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1bf09a58-1087-46d9-a8b8-de34d1cae6d6/88594931500.pdfIn PDF document text
    • https://fb79ad55-22b5-4823-9538-35c71bbbd514.filesusr.com/ugd/ea423f_0130346aa32f43d0a8212c61efebe624.pdf?index=trueIn PDF document text
    • http://jisunopesaluzi.atwebpages.com/errorless_biology_free_download.pdfIn PDF document text
    • https://793776f3-68b4-44d3-947a-596ce2c6f652.filesusr.com/ugd/4e977a_5d0d563227d34fe79bf30c0410a311db.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/56f4bb7b-2278-419f-81f5-cfa1eb279106/10587387400.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a5b932f-f024-4b5f-9ce7-bd17bd94d153/cfa_level_1_pass_rate_reddit.pdfIn 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_off0000e3f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F9 5536 bytes
SHA-256: e30003bf8eb523ef9898e52c32c5efbf60af37e6355f99a2002385ff298b38e0
font_01_sfnt_off0000f6d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D6 11712 bytes
SHA-256: c95178fc6ac9127cfc3f0e5ffbe12bf38a45d2c2cee2521f814b556226332165

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