Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fcf5d4b07918313…

MALICIOUS

PDF

75.1 KB Created: 2021-03-26 13:27:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 6370882b573f1fa6575072fa2c61230f SHA-1: ca2ca9ce4eec6a7d5f11d7977407c464a755b9f5 SHA-256: 0fcf5d4b0791831364df7f18a8df679098099fcfd553920def0ec0e6b20b0374
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many pointing to disposable hosting, suggesting it functions as a link farm designed to redirect users to potentially harmful content. The presence of embedded URLs and the structure of the PDF point towards an attempt to exploit users through deceptive links, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/123?utm_term=format+to+two+decimal+places+c%2523 PDF link annotation
    • http://ferobozimu.iblogger.org/shell_script_tutorial_for_beginners.pdfIn PDF document text
    • https://bewotenugajuvu.weebly.com/uploads/1/3/2/6/132695730/ritedakupamigad_kotug_tonataxuxo.pdfIn PDF document text
    • https://mapogukokerezat.weebly.com/uploads/1/3/5/9/135987870/b8d90f9c.pdfIn PDF document text
    • https://cdn.sqhk.co/fuwasokeg/iGaANgG/a10_arcade_shooters.pdfIn PDF document text
    • https://cdn.sqhk.co/xekemini/ijCha1K/best_free_wifi_analyzer_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/woteruzid/hbYlggl/lucknow_master_plan_2021_map.pdfIn PDF document text
    • https://vopusufibos.weebly.com/uploads/1/3/4/7/134731751/tuguwemobirafo.pdfIn PDF document text
    • https://cdn.sqhk.co/goropakuvoge/ihiec6a/34690857702.pdfIn PDF document text
    • https://relugudikovok.weebly.com/uploads/1/3/4/2/134265752/e036c463e.pdfIn PDF document text
    • http://vupiziriwopo.22web.org/mobawipedemuk.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/73462873107.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ratobewiwigu.atwebpages.com/1312166471.pdfIn PDF document text
    • http://daxotumolurotaw.rf.gd/pujoponovebuvixe.pdfIn PDF document text
    • http://vafitinupisojud.onlinewebshop.net/white_tiger_cast_movie.pdfIn PDF document text
    • https://599b09cd-7b6a-4758-94a3-08a08d316165.filesusr.com/ugd/628a76_d9922943d07541bb9c3cea5a1732dead.pdf?index=trueIn PDF document text
    • https://86a9da1b-0b57-4b35-a77a-523886b904cd.filesusr.com/ugd/0d9a50_dda8681cb239409cbf116b36fa624cf3.pdf?index=trueIn PDF document text
    • http://rubipupajet.rf.gd/43166224998.pdfIn PDF document text
    • https://932aa67c-856a-4fda-9fc8-fe3f50d4acc2.filesusr.com/ugd/a25eee_8d807cf7c77a459ab18fc57de29b6d70.pdf?index=trueIn PDF document text
    • https://c5e26362-acc3-4c40-9db4-ce0cbd355080.filesusr.com/ugd/681527_135995529e7e4eda8c863db7d540ba95.pdf?index=trueIn PDF document text
    • https://65de77fc-0341-4fd2-89b2-cd6b005a91de.filesusr.com/ugd/cf79db_bce2f0012e284286a61ff8083430102b.pdf?index=trueIn PDF document text
    • http://jeborawaleko.atwebpages.com/gexarejagudozu.pdfIn PDF document text
    • https://2a4065d7-883d-43e8-a524-7ce9aa4b4e88.filesusr.com/ugd/ccb1c6_41c7b769bbbd4403a2bd79d531d2deb6.pdf?index=trueIn PDF document text
    • http://pawuzax.onlinewebshop.net/concrete_admixtures_free_download.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_off0000e618.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE618 5264 bytes
SHA-256: 08bf01c2ae59c52a50d43a9f419f2d78114297bbdf504a7f32112a006ee485dd
font_01_sfnt_off0000f7f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7F8 11580 bytes
SHA-256: 96f452c6a70566225f82193074ed311eb27528ea2b005723bbce0ab990692a72