Malicious PDF — malware analysis report

Static analysis result for SHA-256 224f3b8802ce357e…

MALICIOUS

PDF

92.0 KB Created: 2021-04-16 21:46:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e345eb145988230ad40af48a891f69d3 SHA-1: d866b03fdce131e8f84e2c281f3dbeac0f3f2300 SHA-256: 224f3b8802ce357e8d763734bacaa4e0ed0f05b40387901b01206cf821f201c5
126 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly indicated maliciousness. The document body, though heavily obfuscated, appears to be a lure related to appliance maintenance, designed to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://jumiwimov.ru/strik?utm_term=how+to+level+samsung+vrt+plus+washer
    • http://gexomafe.mypressonline.com/3426771491.pdf
    • https://cdn-cms.f-static.net/uploads/4475208/normal_605505b798208.pdf
    • https://cdn-cms.f-static.net/uploads/4378623/normal_6061b6b8e3378.pdf
    • https://cdn-cms.f-static.net/uploads/4459035/normal_6017b189de2eb.pdf
    • http://foselosen.sportsontheweb.net/fevikenamogawunomu.pdf
    • http://medebupima.sportsontheweb.net/chen_linear_system_theory_and_design_solution_manual.pdf
    • http://figuxovutofid.mygamesonline.org/95730632538.pdf
    • https://static.s123-cdn-static.com/uploads/4374953/normal_5ff08cfbeea6b.pdf
    • http://lamanixumerad.mypressonline.com/como_instalar_camera_de_segurana_residencial_passo_a_passo.pdf
    • https://static.s123-cdn-static.com/uploads/4459921/normal_6005f72eb2271.pdf
    • http://sizuxofutitarax.mypressonline.com/49389324803.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://2a4c341d-9af7-4f89-b48a-1b926ad6ced7.filesusr.com/ugd/dd6616_c8313e49102b4be0b709b98077458bb8.pdf?index=true
    • http://belibivizonojo.myartsonline.com/levaje.pdf
    • https://d5bea983-5bca-41ba-aae6-6b688785cc77.filesusr.com/ugd/9ec29b_1bac3ec99ca54616a43d676ead875f43.pdf?index=true
    • https://s3.amazonaws.com/belapawerezuju/what_happens_if_there_is_no_quorum_in_the_senate.pdf
    • https://s3.amazonaws.com/sefabe/business_card_templates_for_free.pdf
    • https://a4ae9d37-b6e9-49cc-beb7-9e0af2956346.filesusr.com/ugd/87b9a8_688afb08e6d04828aeb7e985f4f04667.pdf?index=true
    • https://d1ced4a1-fa29-4c66-b583-77209f32159a.filesusr.com/ugd/c88d8b_d48f2548f7ab4416b076d0d40fd6ab64.pdf?index=true
    • http://lufopudizomuv.atwebpages.com/encyclopedie_mdicale_en_gratuit.pdf
    • https://s3.amazonaws.com/towutoginadivu/polk_audio_subwoofer_psw10_manual.pdf
    • 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_off000128dc.bin
5939ca89cad33bdf06e326fff1f839b473eab2d48c6905a146cee692ec047eea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128DC 5348 bytes
font_01_sfnt_off00013af6.bin
ac3e32c7f86df9b6dd69d941549facb2a77f37e6e5e9c07e28a0eefb5a19ad2a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13AF6 11676 bytes

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