Malicious PDF — malware analysis report

Static analysis result for SHA-256 92f19231cc4ab466…

MALICIOUS

PDF

96.6 KB Created: 2021-02-13 19:38:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b248ab25c8e9b2a1634a4b2a11681abb SHA-1: 2daf6e9eec7706ae964380b2f7b2964fbf6cfb71 SHA-256: 92f19231cc4ab466aa779fd3f232a28fa9ea259c021c0decbe080701d9ad3db4
124 Risk Score

Malware Insights

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

The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of an external URI and urgency lures suggests a phishing attempt or a redirect to a malicious site. Although no scripts were explicitly extracted, the PDF format can embed JavaScript, which is often used to initiate downloads or redirects.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://leonvi.ru/wix?keyword=alexander+hayne+mono+blue+sideboard+guide
    • https://wonumajogo.weebly.com/uploads/1/3/1/3/131379434/kiremizoweju.pdf
    • https://cdn-cms.f-static.net/uploads/4475999/normal_601d67a6464ad.pdf
    • https://static.s123-cdn-static.com/uploads/4502436/normal_5fcf6a9026c4a.pdf
    • https://retariluwefise.weebly.com/uploads/1/3/4/8/134858211/xisaz.pdf
    • https://static.s123-cdn-static.com/uploads/4457582/normal_5ffa084f74f64.pdf
    • https://dexidete.weebly.com/uploads/1/3/5/3/135394420/4557728.pdf
    • https://cdn.sqhk.co/nixafusoda/IhdT4h3/77197996385.pdf
    • http://bettermoneytips.com/beduliviropupodebamaricskyc.pdf
    • https://cdn-cms.f-static.net/uploads/4370064/normal_601bb38dbbdcb.pdf
    • https://static.s123-cdn-static.com/uploads/4410462/normal_5fec941f479f3.pdf
    • https://cdn-cms.f-static.net/uploads/4481166/normal_5fda66462a2e5.pdf
    • http://goodshopsales.xyz/alone_on_the_way_piano_sheetkkaw2.pdf
    • https://xesanojazal.weebly.com/uploads/1/3/0/9/130968931/zidarema.pdf
    • https://cdn.sqhk.co/wimiwupo/gyjejgf/75715166745.pdf
    • https://static.s123-cdn-static.com/uploads/4392658/normal_5fff055e6be9e.pdf
    • https://cdn.sqhk.co/wufevinek/edji1jb/ultimate_background_eraser_apk_download.pdf
    • https://cdn.sqhk.co/keliziniw/hihdWrF/fetawojosukiditon.pdf
    • https://cdn.sqhk.co/nedovipirumu/gjjhs5l/wrecking_ball_chords_piano.pdf
    • https://cdn-cms.f-static.net/uploads/4449421/normal_5fd9d7d48f2e4.pdf
    • http://idealica-ituficiale.website/fibowivofigioui3n.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013b80.bin
ddded1ab10d09a9d8d2e4aa3bc0e820eed5c4aa453c3583545fcb1bb2552a0f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B80 5536 bytes
font_01_sfnt_off00014e31.bin
2540bdf9a2c26e71f368d6bbdc9f5b486df9b3ee4486cfe81d28d578e29c1892		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14E31 11476 bytes

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