Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cf8afdfd7774a49…

MALICIOUS

PDF

83.9 KB Created: 2021-03-20 17:18:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 4f43cf20725d983e9076a5376c16f2e0 SHA-1: 93fcbbfa29cb0d11fc97f77dfd4ac4b873ceae0e SHA-256: 9cf8afdfd7774a4978e7de5a4aa1fbc11b35c580551d72385fe7e522d0147f61
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful 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
  • 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/wix?keyword=hopscotch+julio+cortazar+pdf PDF link annotation
    • http://nokiwurugibub.mypressonline.com/plasma_gasification.pdfIn PDF document text
    • http://rokamik.iblogger.org/filmic_pro_ipa.pdfIn PDF document text
    • https://cdn.sqhk.co/dajuzafum/hKFhiUn/47447053218.pdfIn PDF document text
    • http://joblanc.xyz/consonant_blend_th_worksheet942mx.pdfIn PDF document text
    • https://cdn.sqhk.co/dekavaka/aykUSOH/vozasezopulafo.pdfIn PDF document text
    • https://cdn.sqhk.co/fapolokid/pfj9Yhi/wordbrain_2_vegetables_8x8.pdfIn PDF document text
    • http://ginupedarokuxu.getenjoyment.net/rutarizitogibawodawe.pdfIn PDF document text
    • https://cdn.sqhk.co/fakineduxafe/gYiaAgi/club_spa_suite_azamara_club_cruises.pdfIn PDF document text
    • http://magnetfix.store/votekabo9g6vz.pdfIn PDF document text
    • https://cdn.sqhk.co/woberimi/G5ifhfR/pivamujutokenixojulejo.pdfIn PDF document text
    • https://cdn.sqhk.co/numovasovev/rthfgdn/best_paper_plane_glider.pdfIn PDF document text
    • https://cdn.sqhk.co/pibexezases/jfDicid/jungle_marble_blast_mod_apk_revdl.pdfIn PDF document text
    • http://kinemulawaw.sportsontheweb.net/reading_samples_for_ielts.pdfIn PDF document text
    • https://cdn.sqhk.co/jimevexir/ibkBEhh/photo_warp_app_iphone_free.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://tufubumokagefe.rf.gd/4732563496.pdfIn PDF document text
    • http://wurekino.epizy.com/battletech_board_game.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_off0000faaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAAF 4988 bytes
SHA-256: a1c154d83acda6abd3910139df7bd899d877e4ff2f186e643050eaf6dc4269a2
font_01_sfnt_off00010bba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBA 12032 bytes
SHA-256: 401f89721269fd9763b7a265afee51a8fde2b69e30245dc0e4fb1fda016c385c
font_02_sfnt_off0001335a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1335A 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

Open this report in the interactive analyzer, or submit your own file for analysis.