Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7b794e2db351300…

MALICIOUS

PDF

85.8 KB Created: 2021-04-07 21:41:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 640f6041e90315844c07272963868ad7 SHA-1: 83210d0de9d638da7f5459be3c38abce3eff01dd SHA-256: f7b794e2db3513006215c1ca55d998e36d9908ab0dde4471b47b9bde700b4d74
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that redirects to a malicious domain, likely as part of a phishing campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, appears to be a lure related to 'child labour in poems', directing users to the suspicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xezojetit.ru/wix?keyword=child+labour+in+poems
    • http://regsenatvumen.website/15165946744taas4.pdf
    • http://vilopeg.xyz/83599712913svsub.pdf
    • http://nonoxutiwi.mypressonline.com/xajalapexalatozawepimew.pdf
    • https://static.s123-cdn-static.com/uploads/4392462/normal_5fc90be2ee6c7.pdf
    • http://girlsbeach.space/40767140197835zk.pdf
    • http://rrrrkkkkk.space/sportcraft_electronic_dartboard_dartsmvxcs.pdf
    • http://ninomut.sportsontheweb.net/definicion_de_registro_anecdotico.pdf
    • http://pegejoruvufiron.sportsontheweb.net/pugekivek.pdf
    • http://fawaxifiwuzodil.scienceontheweb.net/approximation_questions_and_answers.pdf
    • http://women-ita.space/how_to_be_a_master_storytellerk0vkd.pdf
    • http://shopsupergood.site/91527704594142ak.pdf
    • http://kusafomidufe.mywebcommunity.org/equus_africanus_asinus.pdf
    • http://simcars.ru/baby_bjorn_travel_crib_sheetv5zso.pdf
    • https://cdn-cms.f-static.net/uploads/4384460/normal_5fe84cb64e935.pdf
    • http://garant-ritual.online/femipam6i5qc.pdf
    • http://muzhskoizhurnal.ru/semiconductor_devices_physics_and_technology_3rd_ed._s._m._sez_wileyg99mg.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://55f5e71c-5f54-469f-9449-301c43944234.filesusr.com/ugd/bbdb65_145c5bb8c2cf4e33b6876ca3e33cdfce.pdf?index=true
    • https://995be609-08d3-41b1-a6c0-90e53670bcec.filesusr.com/ugd/9988e1_3f7b942c128f410c830f761fae5e6547.pdf?index=true
    • https://bed2d873-735b-46bb-a8a3-264d0455df4e.filesusr.com/ugd/03ede2_c102847093cd432fab69ad278e779873.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001129f.bin
bceed9a394f1c5f8f7298d3acfe2ff04ae5f35a81dba2e69492dce47f9860da6
pdf-font-stream PDF embedded font (sfnt) at offset 0x1129F 5244 bytes
font_01_sfnt_off00012435.bin
1d4a36035e923b24338d238e04a97428de88c7f7a84454a295f2623dc89caf35
pdf-font-stream PDF embedded font (sfnt) at offset 0x12435 11208 bytes