Malicious PDF — malware analysis report

Static analysis result for SHA-256 222d4a928529628f…

MALICIOUS

PDF

170.1 KB Created: 2021-02-15 00:27:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: cb467cdb1283e1a0ba6e3055b9656d80 SHA-1: 468dc0c75e281969364d4223702f9a3784fb883f SHA-256: 222d4a928529628f48fe2bcbca8d3eb31b90b6bd8ff56415d0d29fa3210d1147
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The document body, though truncated and containing metadata, suggests a lure related to school supplies, which is a common tactic for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://jacksth.ru/123?utm_term=woodland+elementary+school+supplies+list PDF link annotation
    • http://lnstagram-blue-ticks.com/487211950890bq47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486552/normal_6020887092d67.pdfIn PDF document text
    • http://mscredit.info/xexifejakonilukesa2nbw9.pdfIn PDF document text
    • https://cdn.sqhk.co/wezupobuwab/jQggjbt/suxovuwesimepewupoveji.pdfIn PDF document text
    • http://naturfresh.space/grulla_de_origami23tw5.pdfIn PDF document text
    • https://cdn.sqhk.co/xafigozenusu/ZhiC2UY/sing-_magic_karaoke_free_songs.pdfIn PDF document text
    • http://pelistens.xyz/karitekekigimevwp9og.pdfIn PDF document text
    • https://cdn.sqhk.co/lizupasepafu/JjfIVnW/nusotuxodejonimaxup.pdfIn PDF document text
    • http://ludshop.xyz/19473846560nu0w7.pdfIn PDF document text
    • http://idclick.cash/95318222724hzu7h.pdfIn PDF document text
    • http://mydenverneighborhoods.com/palabras_agudas_graves_y_esdrujulasg66b9.pdfIn PDF document text
    • http://vorecan.fun/66933565475qkg2q.pdfIn PDF document text
    • http://claire-irk.ru/16866838544pwssl.pdfIn PDF document text
    • https://cdn.sqhk.co/xurawupo/hhhiadT/pocket_mortys_parents_guide.pdfIn PDF document text
    • http://tryse.xyz/amanullah_gondal_gender_studieskex89.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386607/normal_5fcf272418808.pdfIn PDF document text
    • http://susurrus.space/zexidu1a5t.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485435/normal_601cd8743be13.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419003/normal_5fea17369ce62.pdfIn PDF document text
    • http://girlita.space/bowl_games_2018_excel_spreadsheetbp0p2.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://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_off0002558c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2558C 5308 bytes
SHA-256: 19e098e28b66141ff103cae41d0ecfbbabafdddfbb2b8a6398ba33ff33742a06
font_01_sfnt_off0002677a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2677A 10796 bytes
SHA-256: f4fe8bd839a25734a45245602ec070b1c03770f5a29bb72123e3f0dea526f516
font_02_sfnt_off00028bf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x28BF5 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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