Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ca2841a00c40172…

MALICIOUS

PDF

80.1 KB Created: 2021-04-25 16:54:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b30a490dc01cd7a95f55589f86b6870a SHA-1: d0ad5810dc5db16a6d0cc13298fe554299ee9a46 SHA-256: 0ca2841a00c401725d05b774e27544e00a7d2db817c52e4a509e86e500cf1196
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with a primary link to 'vilenefex.ru' which is likely part of a phishing or scam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily corrupted, suggests a lure related to technical troubleshooting, aiming to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://vilenefex.ru/strik?utm_term=how+to+fix+f06+error+whirlpool+washer
    • https://fuvepuzineg.weebly.com/uploads/1/3/4/4/134463404/7493195.pdf
    • https://nonuradijo.weebly.com/uploads/1/3/1/4/131406562/boxubebujoluxarowiz.pdf
    • https://viwitilabepimep.weebly.com/uploads/1/3/2/6/132695477/d8c5f72.pdf
    • https://xinuxarovota.weebly.com/uploads/1/3/0/7/130776268/jerasakesuxomuv.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/6bdc2873-ac77-45c5-bd2e-52f7a59a36d1/arnold_ehret_sistema_curativo_por_dieta_amucosa.pdf
    • https://uploads.strikinglycdn.com/files/fc50b847-a8b3-4de2-bb90-821c0d94a836/jupubipu.pdf
    • https://14535e1a-360a-4d01-a655-fa33e115c80e.filesusr.com/ugd/b222ea_2f2bd26069b14aa6927cee9692a3fe95.pdf?index=true
    • https://uploads.strikinglycdn.com/files/fdf8d29f-170f-4e09-b1d4-1bc208a30ed2/troy_bilt_riding_mower.pdf
    • https://uploads.strikinglycdn.com/files/a8499599-d9e0-4f8c-8a70-ef50a260f7f0/old_school_rap_songs_list.pdf
    • https://f039f7e9-c7fa-441d-bf3d-2f0e35d6be10.filesusr.com/ugd/80685d_ae3981b47fcd44b38c293be6872ad345.pdf?index=true
    • https://9c12218e-e157-4070-b33f-4467b3cb42bb.filesusr.com/ugd/0c60a0_cc4d9b08195e4dcea8a32f84dcf910fa.pdf?index=true
    • https://s3.amazonaws.com/genedonapubefe/golf_buddy_vs4_manual.pdf
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_ff7d5af9f68d469ea21e8f56290647d3.pdf?index=true
    • https://uploads.strikinglycdn.com/files/da18d5f3-d666-425f-8cca-67730fd9dc86/how_does_lord_of_the_flies_represent_war.pdf
    • https://s3.amazonaws.com/juliziwojatige/64956504563.pdf
    • https://e5b7f393-9b83-42c5-a877-5b85c0c772c8.filesusr.com/ugd/77b42d_4ec8c830577840adbcb2936944b6d6cd.pdf?index=true
    • https://s3.amazonaws.com/tadevewuju/budget_forms.pdf
    • https://s3.amazonaws.com/nisiwanolom/authorization_to_release_medical_information_form_ny.pdf
    • https://uploads.strikinglycdn.com/files/7d6d32a0-1272-47fa-9df3-4becae2df84e/sexivezibub.pdf
    • https://uploads.strikinglycdn.com/files/05ac2950-cfbe-475a-9e94-9fb3f3938995/zijaxidujobulopijuden.pdf
    • https://3c3b6f52-20a2-448a-be11-eec5930c502f.filesusr.com/ugd/0ca786_e34b26747662464ba2cd96afc064f4b9.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_off0000fc4b.bin
8f96127b4afc61d2f7d744a6ed7bccf623ae76fb23909be0629abd9d764255be		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC4B 5404 bytes
font_01_sfnt_off00010ebd.bin
3a320ed366da487abde1c1b5f406820c609bd11bc3cd169cd5a5f7a758aa30d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBD 10700 bytes

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