Malicious PDF — malware analysis report

Static analysis result for SHA-256 5853617fa08eaa0a…

MALICIOUS

PDF

82.8 KB Created: 2021-04-08 22:02:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1c4403936ab956b65a1e239807a12cff SHA-1: ce31ea09234c6e2317c9551cc4f0b6a5c2ef2740 SHA-256: 5853617fa08eaa0a95ba940ae4a060cf7761a3909fbb6ff9fe03f10c8bdc7f12
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9996

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://jumiwimov.ru/strik?utm_term=how+to+add+plugins+to+fl+studio+mobile PDF link annotation
    • http://govovimifakine.mywebcommunity.org/calligraphy_worksheets_download.pdfIn PDF document text
    • http://netekigupi.22web.org/33767115647.pdfIn PDF document text
    • http://mubarominufu.iblogger.org/53458916012.pdfIn PDF document text
    • https://zewurutivuzaned.weebly.com/uploads/1/3/4/8/134888434/9687023.pdfIn PDF document text
    • http://botanilix.mygamesonline.org/87080427619.pdfIn PDF document text
    • https://sotamepepoj.weebly.com/uploads/1/3/0/8/130874386/kusisegebo-nobef-kegejininijete-sexipijawupun.pdfIn PDF document text
    • https://wujipiledulom.weebly.com/uploads/1/3/4/6/134695719/1c1a24.pdfIn PDF document text
    • https://nabodavovi.weebly.com/uploads/1/3/1/4/131406515/d70f88.pdfIn PDF document text
    • https://dukuvelawabuze.weebly.com/uploads/1/3/0/9/130969723/lakemimosovep_lijenag_furijamej.pdfIn PDF document text
    • https://dowamodugepaxa.weebly.com/uploads/1/3/0/7/130739159/zemurajadupo_dabaxigutuvuf_kesopuwa_dodiluxefadur.pdfIn PDF document text
    • https://balusapox.weebly.com/uploads/1/3/1/3/131380564/72118117e.pdfIn PDF document text
    • http://jelojutu.sportsontheweb.net/equality_and_diversity_in_the_workplace.pdfIn PDF document text
    • http://sevazumemozoli.22web.org/cod_big_red_one_pc.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://sogivuwe.onlinewebshop.net/97270902978.pdfIn PDF document text
    • http://kukalofawofami.epizy.com/96747228167.pdfIn PDF document text
    • http://lokuvutifinulef.rf.gd/36027877934.pdfIn PDF document text
    • http://wufowuteti.epizy.com/evan_moor_spelling_grade_1.pdfIn PDF document text
    • http://silapopo.epizy.com/amelie_poulain_piano_sheet_music.pdfIn PDF document text
    • http://xukokumo.myartsonline.com/xuvopapo.pdfIn PDF document text
    • http://zaximibirada.epizy.com/18945235363.pdfIn PDF document text
    • http://muvekalufisu.atwebpages.com/45491146271.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FA 5340 bytes
SHA-256: 86f24047ec5f038acdde591e0a8d467d35f8a32d7e3542e19a8c0bca3c75347a
font_01_sfnt_off0001091c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091C 11264 bytes
SHA-256: 3b674d24205e5608aa758929f486852afc4271465f4e81c758ac5b8a20020773
font_02_sfnt_off00012fdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12FDF 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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