Malicious PDF — malware analysis report

Static analysis result for SHA-256 eba53c76d4c517ea…

MALICIOUS

PDF

79.5 KB Created: 2021-04-21 10:01:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: c0f90a90bda4a9499890418c89599d69 SHA-1: bdced1515ea6682319255ccff5be54f9c65b7a6b SHA-256: eba53c76d4c517eae6219465303886b131c43ccff9e6dfa40000b75bf2912123
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://jacksth.ru/strik?utm_term=specialized+speedzone+sport+wireless+review PDF link annotation
    • http://igme.site/vetubibavojigd29.pdfIn PDF document text
    • http://nakotigolajeg.scienceontheweb.net/owen_dulce_et_decorum_est.pdfIn PDF document text
    • http://francobusiness.com/554272815364dxwh.pdfIn PDF document text
    • http://krepezh.guru/foluvenekifudr8flb.pdfIn PDF document text
    • http://yachts-4-sale.com/sujolezuv0zovo.pdfIn PDF document text
    • http://ravapusevuj.iblogger.org/xomabudaludupeluveneturel.pdfIn PDF document text
    • http://taxafig.66ghz.com/mimukolelujuso.pdfIn PDF document text
    • https://gutirupivib.weebly.com/uploads/1/3/4/7/134768574/voxonix.pdfIn PDF document text
    • https://zugavugusalozi.weebly.com/uploads/1/3/0/7/130776271/detepamura.pdfIn PDF document text
    • http://romodiresabujum.22web.org/mejudolipoxabifonemas.pdfIn PDF document text
    • http://zoomita.space/how_old_for_fisher_price_jumperood47km.pdfIn PDF document text
    • https://xaxozugine.weebly.com/uploads/1/3/2/3/132303195/ramasaji-kunolax-vokixotitu-donenagibimu.pdfIn PDF document text
    • https://berisojelo.weebly.com/uploads/1/3/0/8/130874511/guguxa-misivolupapudit.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zasegusof.epizy.com/lusasemosoze.pdfIn PDF document text
    • https://645c32c3-7e99-4959-b93b-7980205539d7.filesusr.com/ugd/30a31c_af178a9ffd9345c6b1eb76b7a56033ac.pdf?index=trueIn PDF document text
    • http://jokubamobivavum.onlinewebshop.net/tutoriales_para_tocar_guitarra_electrica.pdfIn PDF document text
    • http://zodinedew.epizy.com/4034704238.pdfIn PDF document text
    • https://ea7788ad-ef5a-48b5-911d-3ad522045378.filesusr.com/ugd/f3bfbb_09daf1bda03244f39639b3c4a70993fe.pdf?index=trueIn PDF document text
    • https://02796127-04ec-4c85-b270-c6f7310ebb18.filesusr.com/ugd/ce0e6d_62ca023af3104de693b4df9585e0b86e.pdf?index=trueIn PDF document text
    • https://e1c07d4e-6587-4767-b76f-5dea9cf3e327.filesusr.com/ugd/51a829_496b3fa92a0442b8a061e202ba9802e8.pdf?index=trueIn PDF document text
    • https://76f5a3e5-08d8-4581-9975-6c1b933a1845.filesusr.com/ugd/dbbd16_c330a1be14d245f39d0af98ceeb9b3aa.pdf?index=trueIn PDF document text
    • http://gotimovogeminir.myartsonline.com/barche_lamsel_prayer.pdfIn PDF document text
    • http://vakifavu.onlinewebshop.net/rofagefetivavulubufov.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_off0000f7d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D6 5372 bytes
SHA-256: 25b9f7ed6a88df837a5ce108ccd8d08f99de639cbe02529875f5942b49b0f1a0
font_01_sfnt_off00010a4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A4A 11372 bytes
SHA-256: 58738bc2c78816eb1d3755fddaa452d3a79042bac9e5fc1ab6bd8784f088a014