Malicious PDF — malware analysis report

Static analysis result for SHA-256 c000f2c1047a4533…

MALICIOUS

PDF

120.5 KB Created: 2021-03-01 15:34:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: a2b2e672812dbf26bdf0e9bfdaa35b44 SHA-1: 168fefad121f4238561e74fb095520089ac54c60 SHA-256: c000f2c1047a453385467619bdea354b234082f1485c51a3bf11ff8e94bb39e3
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a significant portion pointing to disposable hosting and acting as a link farm. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to obscure the final destination, likely a phishing site or malware download. The ML classifier and ClamAV detection strongly suggest malicious intent, aligning with a phishing or credential harvesting attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://midufefew.ru/aws?utm_term=what+are+behavioral+skills+training PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4473619/normal_602aac91a78d3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386607/normal_5fdc01dec7ee8.pdfIn PDF document text
    • http://duxinivodozular.mywebcommunity.org/vapovasu.pdfIn PDF document text
    • http://dilawiputonu.mypressonline.com/microsoft_project_training_courses_online.pdfIn PDF document text
    • http://lupaper.22web.org/ios_app_store_design_guidelines.pdfIn PDF document text
    • https://cdn.sqhk.co/zisubiziwu/hgPie1R/31765505483.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4487424/normal_5fcb8e0fcf10e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393647/normal_5ff76e58cd72b.pdfIn PDF document text
    • http://naguvogegexaze.22web.org/curso_finanzas_personales_universidad_javeriana.pdfIn PDF document text
    • https://cdn.sqhk.co/tinulafi/aiaFNhH/zenozinoga.pdfIn PDF document text
    • http://sulogajifuv.iblogger.org/gezurugowebupimifej.pdfIn PDF document text
    • https://cdn.sqhk.co/rufadexu/bhemIid/verizon_call_filter_free_vs_plus.pdfIn PDF document text
    • https://cdn.sqhk.co/sarunasol/gjmGVE5/kidozukosuruzesupabu.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/bexavadimezilederenuleve.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464525/normal_600ee89e295f6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://tadezaxe.rf.gd/binuzedapigos.pdfIn PDF document text
    • http://tapavakagazu.epizy.com/grundfos_alpha2_15-_60_user_guide.pdfIn PDF document text
    • http://komujawabajufob.rf.gd/pigavakif.pdfIn PDF document text
    • http://livofos.epizy.com/what_does_222_mean_in_islam.pdfIn PDF document text
    • http://zapofekeba.rf.gd/chrysanthemum_flower_pic.pdfIn PDF document text
    • http://funuduki.rf.gd/91883016846.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000178c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x178C6 5012 bytes
SHA-256: dbee6fd5c1cc0f9d63a403c76ee291415277b9f5512727dbc1e6d7ca22678f9c
font_01_sfnt_off000189d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x189D5 12232 bytes
SHA-256: e0c527f3df3a03ced4e22f350424372a7c7a225335702ae2dad1d2e331d1136b
font_02_sfnt_off0001b169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B169 16036 bytes
SHA-256: ffcc099cb313ee7442755751e66ee5b466d1c2ae3a5aa4db1c7e493352985176
font_03_sfnt_off0001c5d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C5D8 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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