Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b33621f59c4386b…

MALICIOUS

PDF

79.3 KB Created: 2021-01-29 00:43:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 6fb28515c4bd392a1056710003cb85cf SHA-1: efe2e59e7d3c9ef634cf2bb6024851a8431499f5 SHA-256: 8b33621f59c4386b369d6fc693d91e037c70e894b09c29cb3016aa9af8143023
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one specifically noted as an external URI pointing to 'maypoin.ru', suggesting a phishing or redirection attempt. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML detection strongly suggest the PDF is designed to lead the user to malicious content, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://maypoin.ru/123?utm_term=steins+gate+walkthrough+pdf PDF link annotation
    • http://rameautbxy.space/l_blends_worksheets31uj3.pdfIn PDF document text
    • http://optalpha.com/sinidaximokewuxavekumazoxkqxbi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391920/normal_5fc6b92b24581.pdfIn PDF document text
    • https://mulokigapasol.weebly.com/uploads/1/3/1/0/131070847/47833f.pdfIn PDF document text
    • https://setanalad.weebly.com/uploads/1/3/0/7/130775470/bavabi_rafuri_nowinotuli_lubomofabeton.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452607/normal_60002f645eff4.pdfIn PDF document text
    • http://vashastrahovka24.ru/7282200629ddai5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454999/normal_5fe4474a25860.pdfIn PDF document text
    • http://hotita.fun/lego_pirates_of_the_caribbean_london_town_glitchjijkk.pdfIn PDF document text
    • http://frankkyko.com/79029369119wda6t.pdfIn PDF document text
    • https://tujiwukof.weebly.com/uploads/1/3/4/5/134592642/verakapevamexi_fogatepuju_daxubowage_bowamegepo.pdfIn PDF document text
    • http://sobakin.space/lukikifolenirebgkbp9.pdfIn PDF document text
    • https://kunamugak.weebly.com/uploads/1/3/0/7/130739026/5030078.pdfIn PDF document text
    • https://juxeduwabup.weebly.com/uploads/1/3/0/7/130775558/fapiziro_wemijipamalug_dolid_walisinogafu.pdfIn PDF document text
    • https://janirakuvofubej.weebly.com/uploads/1/3/4/7/134734148/tesasegu.pdfIn PDF document text
    • http://summerita.fun/minecraft_pocket_edition_v1._9._0._15_apkm44lx.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452593/normal_5ff4e0b8380e5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368489/normal_5fe8726cbfc8d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f82b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF82B 5560 bytes
SHA-256: 90a7f14abaf3756b6390ac701242b792c18e21efd99f987b06a3eb50bcd7f142
font_01_sfnt_off00010b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1D 10824 bytes
SHA-256: 41ef70fd19246ae2f00f5e793372dabf8157748b64312e8dd1d8ec1822b36bb6

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