Malicious PDF — malware analysis report

Static analysis result for SHA-256 982c80111bd3be65…

MALICIOUS

PDF

84.8 KB Created: 2021-03-22 19:39:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f4f02ce6463e0d867fc8584278d762e9 SHA-1: 208847e66fbe3abfdff251684d7717a2808186f0 SHA-256: 982c80111bd3be656f0be5bd56fcbb331fda68af72735a879b1d24b255625714
134 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF contains numerous embedded URLs and a heuristic firing for a 'link farm on disposable hosting', suggesting it's designed to redirect users to malicious sites. The 'SE_DOWNLOAD_BUTTON' heuristic further supports a phishing or malware distribution lure.

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 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/123?utm_term=mht+cet+admit+card+2019++mahaonline PDF link annotation
    • http://it50disconto.info/21019613073a857l.pdfIn PDF document text
    • http://bebalezuve.medianewsonline.com/kalnirnay_august_2020_marathi_calendar.pdfIn PDF document text
    • http://loveantravel.xyz/statistics_for_management_and_economics_keller_free_downloadhcpwz.pdfIn PDF document text
    • http://laposedofijusi.iblogger.org/89006236029.pdfIn PDF document text
    • http://jugapus.sportsontheweb.net/sedentarismo_tesis.pdfIn PDF document text
    • http://tebapewulodafe.getenjoyment.net/bacillus_subtilis_natto.pdfIn PDF document text
    • http://adanakebap.org/widasuduvorapg8zd.pdfIn PDF document text
    • http://rezanufeku.mygamesonline.org/empirical_and_molecular_formula_worksheet_answers.pdfIn PDF document text
    • http://zinebuwe.iblogger.org/35201395418.pdfIn PDF document text
    • http://ionatr.space/ammonia_in_wastewateruk0l0.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ca108e69-7b6b-43f0-8f16-d96ebeb8a33d.filesusr.com/ugd/79e0dc_7cc71833335c4e2dbcf519e28c5a88c3.pdf?index=trueIn PDF document text
    • https://c504e2ef-f928-4e80-b5b1-fc05046f432e.filesusr.com/ugd/247f25_0c9bfa97a2714ff78c86b7b6d18eb276.pdf?index=trueIn PDF document text
    • http://pogotoxevug.epizy.com/sakhi_movie_songs_naa.pdfIn PDF document text
    • http://rofanuw.rf.gd/5253185943.pdfIn PDF document text
    • http://rabatelekovufar.myartsonline.com/7256571453.pdfIn PDF document text
    • http://rimamosapike.epizy.com/atomic_structure_notes_for_class_9.pdfIn PDF document text
    • http://negekipewunej.epizy.com/how_to_write_an_elearning_storyboard.pdfIn PDF document text
    • http://dibulazovila.rf.gd/81722587517.pdfIn PDF document text
    • https://01c4c9a3-ee74-4db9-a65d-799443b8dbf1.filesusr.com/ugd/a64c8c_16f425d8a1c94fcea564f9f161ebeca1.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF491 5488 bytes
SHA-256: bc48c487cdfc64fbf5db59243e39bfd376db70273f6b8cb1e6e89b3f8e2e4eaa
font_01_sfnt_off0001071c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1071C 11600 bytes
SHA-256: 6dbeebef48b96a4b15c22c2c495598f51beeb022601631c3fc35624b571484b0
font_02_sfnt_off00012ebe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EBE 16164 bytes
SHA-256: 6e3fbd491d8b71441998836ddca0d0c102716a221ea14f8143929167ad9a79b3

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