Malicious PDF — malware analysis report

Static analysis result for SHA-256 520e7b22659eb41f…

MALICIOUS

PDF

87.1 KB Created: 2021-03-09 08:32:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 9fec2e41b70dc75966777a096d521b4e SHA-1: 704e184fbf6c025f91c25fc19bb0f62bad8a0351 SHA-256: 520e7b22659eb41fb3fd9129f278a573b1b2fc269c774d71cce5bc5531d33de5
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the overall structure strongly suggest this document is part of a phishing or malware distribution campaign.

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://xajibur.ru/award?keyword=the+abundance+book+free+pdf PDF link annotation
    • http://lixakux.22web.org/kedutizulexopoku.pdfIn PDF document text
    • http://gulebamabixaku.22web.org/87204087331.pdfIn PDF document text
    • http://fuvafutiku.22web.org/45139459346.pdfIn PDF document text
    • https://vixalabalu.weebly.com/uploads/1/3/4/3/134396729/c4c3dcdd31.pdfIn PDF document text
    • http://jisuvakuwiraza.medianewsonline.com/income_tax_appellate_tribunal_rules.pdfIn PDF document text
    • https://jodejivosarixu.weebly.com/uploads/1/3/4/3/134314211/guganeg.pdfIn PDF document text
    • https://bopilewe.weebly.com/uploads/1/3/4/5/134523270/wijigametiveviwaxu.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://bowegasobufur.myartsonline.com/tratamiento_para_candidiasis_bucal.pdfIn PDF document text
    • http://rilokew.rf.gd/dark_souls_remastered_walkthrough_part_14.pdfIn PDF document text
    • https://70848fb0-0fd0-490a-9360-2ffa38fc212c.filesusr.com/ugd/08e331_893554cf91334fbda4da43eef0224466.pdf?index=trueIn PDF document text
    • https://c8070bf9-ed42-4c5d-8eb8-ca35ee70f136.filesusr.com/ugd/d38238_f0045ed22905464fbc6a8429854b25d6.pdf?index=trueIn PDF document text
    • http://nabukewegurizev.rf.gd/sectional_chart_class_g_airspace.pdfIn PDF document text
    • http://negekipewunej.epizy.com/botamafubibesewos.pdfIn PDF document text
    • http://surigel.rf.gd/polovukidapexijiv.pdfIn PDF document text
    • http://kutegabirena.epizy.com/android_vs_ios_market_share_worldwide.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_54804e1f955740bbbe7a3360e2be3d27.pdf?index=trueIn PDF document text
    • http://nadiripu.epizy.com/41415455908.pdfIn PDF document text
    • http://mojebevusawibo.rf.gd/android_tv_app_for_tv.pdfIn PDF document text
    • http://juvofirodeburu.epizy.com/samsung_hw-h550_setup.pdfIn PDF document text
    • http://bibezakomi.myartsonline.com/anime_characters_stronger_than_one_punch_man.pdfIn PDF document text
    • http://ziputira.epizy.com/candy_crush_friends_apk4fun.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_off00010c84.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C84 4940 bytes
SHA-256: b733e384c59e84591a9aa08cf3655158c2ec2b634b720f4da47dfffaedb98efd
font_01_sfnt_off00011d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2C 10640 bytes
SHA-256: 4d1f2ab1fa472a602d2653a80209799450a3f548a275b6f2476c332e1ff57feb
font_02_sfnt_off00014157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14157 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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