Malicious PDF — malware analysis report

Static analysis result for SHA-256 89c812f23af2239c…

MALICIOUS

PDF

75.4 KB Created: 2021-03-12 00:46:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 17535ccb78cc5fce851febe066be3699 SHA-1: 9bb3740d66015adf7d4ad1cd260ff6070aa8a9c7 SHA-256: 89c812f23af2239c5e1b43571b40f4a9321f5c02ad6fa3656a9d624ac00c82ee
194 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious sites. The heuristic 'SE_INVOICE_LURE' indicates the document's content is likely a deceptive lure, such as a fake invoice or payment request. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://zajinet.ru/123?utm_term=inspection+and+acceptance+report+appendix+62 PDF link annotation
    • http://dororuminaxa.mywebcommunity.org/xefuk.pdfIn PDF document text
    • https://fakivafepupu.weebly.com/uploads/1/3/0/8/130873921/voriseme.pdfIn PDF document text
    • http://rikeropovi.22web.org/vetogub.pdfIn PDF document text
    • https://tujurexi.weebly.com/uploads/1/3/4/7/134743655/7948476.pdfIn PDF document text
    • http://rekopeza.22web.org/how_to_start_a_samsung_vrt_steam_washer_wont.pdfIn PDF document text
    • https://tusezewepoxir.weebly.com/uploads/1/3/4/3/134339989/5796370.pdfIn PDF document text
    • http://kamodokawi.iblogger.org/36982682622.pdfIn PDF document text
    • https://domafotenok.weebly.com/uploads/1/3/5/9/135973376/faluronufunafokedawo.pdfIn PDF document text
    • http://tejowigasinafu.getenjoyment.net/vubizejerumozon.pdfIn PDF document text
    • https://tesegape.weebly.com/uploads/1/3/5/3/135387632/lirisidoku.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ad9e3d1f-bb22-46ca-892e-b6aa3325a756.filesusr.com/ugd/837d34_825a04f9f03a48a38519bac4bf24c26f.pdf?index=trueIn PDF document text
    • http://vimozav.epizy.com/microsoft_excel_dummies.pdfIn PDF document text
    • http://fitimulosegi.epizy.com/81040175719.pdfIn PDF document text
    • http://zulexesovo.epizy.com/zepogif.pdfIn PDF document text
    • http://wepukuxazej.rf.gd/hseni_accident_reporting.pdfIn PDF document text
    • https://bcd7deca-fd5d-492b-a220-d373ca515bc9.filesusr.com/ugd/12f4eb_dd7ecd1523244d67b3335a96e828d56b.pdf?index=trueIn PDF document text
    • http://mirepili.epizy.com/bokagijani.pdfIn PDF document text
    • http://nixomirorubu.myartsonline.com/how_to_open_a_electronic_showroom.pdfIn PDF document text
    • http://kuzezoma.epizy.com/cameroon_history_since_1800.pdfIn PDF document text
    • https://f733e552-90a1-4d1f-83ca-a6b36afcf31c.filesusr.com/ugd/38bf1f_45401ff031c140518139458400025495.pdf?index=trueIn PDF document text
    • http://fekalalorupip.rf.gd/achieve_3000_level_set_answers.pdfIn PDF document text
    • http://dinisevorodak.epizy.com/miwegofizo.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA93 5324 bytes
SHA-256: 4153d71a6e0a678db0f782ac117506bc53604bc3e40bf1e20f1b64849ec99053
font_01_sfnt_off0000fcbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBF 10364 bytes
SHA-256: 5a9210ff90ef7de7658f85e6898b89ee3a342014e16228c808dbb47f3fd539cd

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