Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ebc496bfb34f1cc…

MALICIOUS

PDF

92.9 KB Created: 2021-02-13 11:18:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 5f2d21d839f0f1b0d10bb7becbe25771 SHA-1: 3926a5061c5a8e0a4db7d7fc6e48df3c060bea25 SHA-256: 9ebc496bfb34f1cc8f2e81ec9042c992cd4eaae35da8fbc748553d46a1fa3133
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 0.9996

Heuristics 6

  • 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.
  • 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://maypoin.ru/123?utm_term=persona+4+marie+figure PDF link annotation
    • https://cdn.sqhk.co/kimejijomaki/7JHZVhV/dingo_ate_my_baby_film.pdfIn PDF document text
    • http://seluluxafej.22web.org/website_footer_html_templates.pdfIn PDF document text
    • http://frontglass.xyz/fatuturuxibs823.pdfIn PDF document text
    • https://dugufenejoropez.weebly.com/uploads/1/3/0/7/130775504/milorezo_naruzade_bubejudoledubox_fugina.pdfIn PDF document text
    • https://gubizelejipeter.weebly.com/uploads/1/3/4/1/134131403/fd758f8b0428143.pdfIn PDF document text
    • https://gowobokibisalo.weebly.com/uploads/1/3/0/9/130969305/419e626fbc0ab2.pdfIn PDF document text
    • https://bewodopogogubak.weebly.com/uploads/1/3/4/8/134886142/0ffc7d3.pdfIn PDF document text
    • https://cdn.sqhk.co/numiwufeguv/nitiiic/525_traffic_way_arroyo_grande_ca.pdfIn PDF document text
    • https://cdn.sqhk.co/bezorufuv/jjiEDPg/need_for_speed_no_limits_apkpure.pdfIn PDF document text
    • http://kind-insta.site/lg_g8_manual5ikgf.pdfIn PDF document text
    • https://cdn.sqhk.co/mobixipotex/idhhJ5h/space_wolves_dreadnought_arms.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/makro_catalogue_october_2019anhq9.pdfIn PDF document text
    • https://cdn.sqhk.co/malevevipali/jahcpih/sevitiwitavona.pdfIn PDF document text
    • http://novajivalokade.22web.org/xurawifowisa.pdfIn PDF document text
    • http://winelorasagi.22web.org/anbanavan_asaradhavan_adangadhavan_hd_movie_free.pdfIn PDF document text
    • https://famimiketavow.weebly.com/uploads/1/3/0/8/130873946/zunigamufe_gatixituwu_jonatisi_xelokurujifugo.pdfIn PDF document text
    • http://gsmall.space/banking_exams_papers6w8vm.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://wisunomimat.epizy.com/yasin_sharif_tarjuma_ke_sath.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011057.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11057 4260 bytes
SHA-256: fc5ae5c9debc2ae2027bf55ce2ebfdc2ede878db63f1075f4257b955d9ed0182
font_01_sfnt_off00011f60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F60 4944 bytes
SHA-256: ba1010e98919aac1749b87ed838462a34e119afd5e5b3502181d1df6e60c77b6
font_02_sfnt_off00013013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13013 11904 bytes
SHA-256: baedc743e4b82efdacab9f2567362c1eb6363cbd114f843f7a4a005b8af8d273
font_03_sfnt_off00015793.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15793 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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