Malicious PDF — malware analysis report

Static analysis result for SHA-256 5be6329aeca295d1…

MALICIOUS

PDF

75.4 KB Created: 2021-04-09 00:28:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: c346da2e951c0c5f2034196e0e012906 SHA-1: b6138a8752dacaea10574eee8720f169110588cd SHA-256: 5be6329aeca295d1531226f0a5f9f86ddbf8d2148e4c8360b526561adf486135
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics point towards the document's primary function being to redirect users to malicious sites, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://gimoguvi.ru/strik?utm_term=how+to+reset+ipega+controller PDF link annotation
    • https://wipiwabe.weebly.com/uploads/1/3/4/4/134438476/162833bfed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413714/normal_5fd9d945ca74b.pdfIn PDF document text
    • http://biwedujurar.mywebcommunity.org/29159805387.pdfIn PDF document text
    • https://sapuvitajesi.weebly.com/uploads/1/3/0/7/130776539/27bfec596f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374522/normal_601d59786e85a.pdfIn PDF document text
    • http://dabukim.mygamesonline.org/anthroponymie_dfinition.pdfIn PDF document text
    • http://mirumumavetifun.mypressonline.com/rirejo.pdfIn PDF document text
    • http://zagejudivavi.sportsontheweb.net/porter_cable_150_psi_air_compressor_drain_valve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460043/normal_5fe6caec8a472.pdfIn PDF document text
    • http://pisufixefonof.scienceontheweb.net/bevusolimorimategojokowit.pdfIn PDF document text
    • http://sipipewawezizuf.getenjoyment.net/12263755913.pdfIn PDF document text
    • https://towipikegogu.weebly.com/uploads/1/3/4/6/134690187/tipasusunolaruw-wabub-zavofotukirun-nobabowofarofut.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488572/normal_5ff9a5b7405ef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dipijiz.epizy.com/insert_watermark_online.pdfIn PDF document text
    • http://xojapenekoxij.rf.gd/solving_logarithmic_equations_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/81c98b7a-75c7-495f-b8e1-33dab0f32698/spalding_54_acrylic_portable_basketball_system_costco.pdfIn PDF document text
    • http://ximuxulizi.myartsonline.com/bushnell_laser_rangefinder_yardage_pro_sport.pdfIn PDF document text
    • http://raxegujanamefas.atwebpages.com/artropodos_parasitologia_veterinaria.pdfIn PDF document text
    • http://nudegew.rf.gd/abc_flashcards_with_pictures.pdfIn PDF document text
    • http://lapetagalelan.myartsonline.com/jutideturiv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32337814-8b88-4706-a05e-1240a55d79e3/my_cloud_os_5_issues.pdfIn PDF document text
    • http://fazaburifug.myartsonline.com/10254325033.pdfIn PDF document text
    • http://zokemunerepefu.rf.gd/rokelilowomigup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/747e3f8c-5a1e-42ac-b47a-d14c28d8fa74/2064281604.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_off0000e8bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8BD 5156 bytes
SHA-256: 9050a4c790ec4f7705a566719c4924adb071eb80c460ce7f8093017de2ee8c2d
font_01_sfnt_off0000fa67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA67 10648 bytes
SHA-256: 9474a0d063eff66edd9b4a883965d36e6814f2d42518fd285b7cb9ff7e7b7ae0