Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1ba4d380a305c89…

MALICIOUS

PDF

78.9 KB Created: 2021-02-28 02:19:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: ec60d42b4f72f1e1e52326766b6576b2 SHA-1: 72c7c9c82903d65bac13c296f5c9b559604912ca SHA-256: d1ba4d380a305c89c92cfc072ed6a5657a31c5266213c56478af086e8a9b3c93
126 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including ML and ClamAV, indicating malicious content. It contains numerous external URIs, many hosted on disposable domains, suggesting a link farm designed to redirect users. The primary lure appears to be a fake driver download for an HP printer, indicated by the URL and the garbled document body text.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/strik?utm_term=hp+deskjet+ink+advantage+2545+driver+mac PDF link annotation
    • http://ziwusis.getenjoyment.net/pesanuzibijixenidajubiso.pdfIn PDF document text
    • http://italy-small.space/xosinonelipujoxudulywmgp.pdfIn PDF document text
    • http://constructionhouse.info/12342315930ac5d6.pdfIn PDF document text
    • http://xijulefabogi.getenjoyment.net/97862343733.pdfIn PDF document text
    • http://rawoxaxevog.mygamesonline.org/reading_techniques_for_struggling_readers.pdfIn PDF document text
    • http://daddytestit.xyz/53872496436usfwt.pdfIn PDF document text
    • http://pitushok.fun/368030002353arz7.pdfIn PDF document text
    • http://zdorovie-vashe-vse.xyz/how_to_calibrate_a_one_touch_glucose_meterie986.pdfIn PDF document text
    • http://avbox.org/pan_baidu_english_apk2q9dp.pdfIn PDF document text
    • http://dajexori.mypressonline.com/pfaff_sewing_machine_instruction_manual.pdfIn PDF document text
    • http://nesebonuvobeju.getenjoyment.net/tom_clancys_rainbow_six_siege_-_deluxe_edition_vs_standard.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487658/normal_5fdbbe231e7ed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469617/normal_6018ef21147cf.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bibejovixapis/pojadejutusi.pdfIn PDF document text
    • http://pozidijapepore.atwebpages.com/zetojuzikakojipab.pdfIn PDF document text
    • http://jotudokizer.onlinewebshop.net/how_to_write_research_proposal_sample.pdfIn PDF document text
    • http://rawigukegopafot.onlinewebshop.net/numexamanebodobepivuben.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EF 5868 bytes
SHA-256: 925e67a513f2d09642fbb78951c750d7f23a1272cc725e9f2a588232bbdcaa6e
font_01_sfnt_off0000fdf1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDF1 14952 bytes
SHA-256: 155fc34c4b99b55e7cded29a8e4f4a355cacb86164ce73b4ebc5c89aa7f0822d

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