Malicious PDF — malware analysis report

Static analysis result for SHA-256 a16072da7509cc39…

MALICIOUS

PDF

84.2 KB Created: 2021-05-29 04:43:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d1a4561870532b852e2872a1343e5bff SHA-1: 79c9cce238605e57bbf187ac847b0e7a44c4703d SHA-256: a16072da7509cc394bc0fd59bfbfb661b005c18b3bd8aafd2494e499f123eb07
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a suspicious domain, likely for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest an attempt to redirect the user to a malicious site, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://seumenha.ru/strik?utm_term=ultimate+spider+man+in+hindi+season+1
    • https://cdn-cms.f-static.net/uploads/4460473/normal_60233ac198daa.pdf
    • https://cdn-cms.f-static.net/uploads/4492915/normal_60321c62f30ad.pdf
    • https://cdn-cms.f-static.net/uploads/4461777/normal_60226ec025312.pdf
    • https://cdn-cms.f-static.net/uploads/4391620/normal_6044245a50b17.pdf
    • https://cdn-cms.f-static.net/uploads/4413975/normal_6060bd5e73669.pdf
    • https://static.s123-cdn-static.com/uploads/4371247/normal_5fe398b0b774c.pdf
    • https://cdn-cms.f-static.net/uploads/4450517/normal_601add27306af.pdf
    • https://cdn-cms.f-static.net/uploads/4369922/normal_602897a550bdf.pdf
    • https://cdn-cms.f-static.net/uploads/4427526/normal_6014bc191ae2d.pdf
    • https://cdn-cms.f-static.net/uploads/4426073/normal_6041fe28a6c66.pdf
    • https://cdn-cms.f-static.net/uploads/4426271/normal_60299d6ec2c9f.pdf
    • https://static.s123-cdn-static.com/uploads/4413109/normal_60083b0b895f7.pdf
    • https://cdn-cms.f-static.net/uploads/4408197/normal_6045076895044.pdf
    • https://static.s123-cdn-static.com/uploads/4376101/normal_5ff15ff40ed0b.pdf
    • https://cdn-cms.f-static.net/uploads/4390999/normal_6052486a6d196.pdf
    • https://cdn-cms.f-static.net/uploads/4531626/normal_6039e52a453a6.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/a23f6cb2-a3d7-4d5c-8e3c-fb739a773ad7/honda_civic_lx_2016_service_manual.pdf
    • https://uploads.strikinglycdn.com/files/d5020162-d47d-4af6-aa96-501d58712dbe/rovemanupuwigipod.pdf
    • https://uploads.strikinglycdn.com/files/ae6fcc00-b413-4947-90fc-f88ead22e92c/zowokisekekofukokuta.pdf
    • https://uploads.strikinglycdn.com/files/0f184f5a-aac0-45be-997a-a4aa3d6676cd/much_ado_about_nothing_2012_review.pdf
    • https://uploads.strikinglycdn.com/files/a0b9ad97-2229-4f3b-be52-d14edfc632d6/iso_22000_requirements.pdf
    • https://uploads.strikinglycdn.com/files/6eda27ed-546e-4c7b-bece-b1031d64626c/mundo_de_sofia_resumen_corto.pdf
    • https://uploads.strikinglycdn.com/files/9e098188-b4a7-40fe-aedb-56da819c47bb/kekavebejubunivid.pdf
    • 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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e82d.bin
fea6e4b68c200ff24071ee586c8e0e509ca5d469146db191b5fe0cc14dc39c99
pdf-font-stream PDF embedded font (sfnt) at offset 0xE82D 5028 bytes
font_01_sfnt_off0000f90c.bin
17b90385396a1c5fc4521b8351fd0a31e70b997cce39df9c4b8ee48da844c0ae
pdf-font-stream PDF embedded font (sfnt) at offset 0xF90C 10556 bytes
font_02_sfnt_off00011d53.bin
cf0ad4ad4c91154c1f5bd2331a08851daf404e4a43ee4fcb746ef38176224bf3
pdf-font-stream PDF embedded font (sfnt) at offset 0x11D53 16372 bytes
font_03_sfnt_off000132c7.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x132C7 4324 bytes