Malicious PDF — malware analysis report

Static analysis result for SHA-256 d25c7743abab701b…

MALICIOUS

PDF

75.1 KB Created: 2021-03-04 11:24:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: e64bc511f79fa5fef6569d0f749cd25d SHA-1: 92254812b9afdb846d8031b404e9407cf152e299 SHA-256: d25c7743abab701bd2e510838849e3b5c6e374e728a30196765eb545144f633f
184 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to known malicious redirectors or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://dafemum.ru/wix?keyword=poke+trip+apk In PDF document text
    • http://sugamipilafo.iblogger.org/getotaro.pdfIn PDF document text
    • http://hargotel.xyz/diwukufumofiweziziguvepugcmju.pdfIn PDF document text
    • http://a1metromovers.com/zuwexumuxakart756d.pdfIn PDF document text
    • http://fudoviwil.mywebcommunity.org/42154354130.pdfIn PDF document text
    • http://wow50.pro/bolanawowajoxupimuvojakodcvzmq.pdfIn PDF document text
    • https://wifenawejiwatu.weebly.com/uploads/1/3/4/8/134879118/lefimew-pedagov.pdfIn PDF document text
    • https://gebiralegesexi.weebly.com/uploads/1/3/0/8/130814020/6799124.pdfIn PDF document text
    • http://dressnbuy.com/optimate_4_dual_program_tm_3410uhs5.pdfIn PDF document text
    • http://detonic-hypertonie.website/71861952255gh6yr.pdfIn PDF document text
    • http://regse.website/sozofamoroverodifukoxqgbx.pdfIn PDF document text
    • http://dukifikepiloj.iblogger.org/ne_me_quitte_pas_lyrics_english_celine_dion.pdfIn PDF document text
    • http://daludaja.getenjoyment.net/86462929969.pdfIn PDF document text
    • http://zanofijufitif.22web.org/rode_videomic_ntg_price_hk.pdfIn PDF document text
    • http://xulodol.mygamesonline.org/83396857928.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • http://popadugabi.rf.gd/43049522549.pdfIn PDF document text
    • http://kilarosine.atwebpages.com/differences_between_world_war_z_movie_and_book.pdfIn PDF document text
    • http://jatoxat.atwebpages.com/76970364618.pdfIn PDF document text
    • http://biwipekimati.rf.gd/14889196158.pdfIn PDF document text
    • http://taludoxatimepup.rf.gd/villa_lobos_sheet_music_guitar.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD67E 4668 bytes
SHA-256: 794c82fbc2b2aa11247ff996412a61e240d42568c20fe62cd3886c970cfeef69
font_01_sfnt_off0000e665.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE665 7660 bytes
SHA-256: c44d67dd8610df5c60e48561b8b6dcb49144d501fd9633934690e4acd08c1ac3
font_02_sfnt_off0000fb77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB77 10364 bytes
SHA-256: c7a424c6d4a41f861f4f4907e0182fe5e99b8e8a1c102e1b13cf52253169272a

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