Malicious PDF — malware analysis report

Static analysis result for SHA-256 338a45add7970a07…

MALICIOUS

PDF

79.6 KB Created: 2021-04-05 00:19:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e6c2879122862e4bf01646097f123176 SHA-1: ae3281432787f0ec06f007770d0463657264cd60 SHA-256: 338a45add7970a0768fcc7f0b5eda14ad45eae144bc0a65d7efef5f2a89ea530
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links pointing to external websites, identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://dugedepap.ru/award?keyword=anglo+irish+treaty+1921+pdf PDF link annotation
    • http://narawodosure.medianewsonline.com/156981077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383923/normal_60390a97b763a.pdfIn PDF document text
    • http://siwivelijutore.medianewsonline.com/diferena_entre_umbanda_e_candombl.pdfIn PDF document text
    • http://nitopito.22web.org/radizekexegisepu.pdfIn PDF document text
    • http://wovegibexakebof.iblogger.org/51550928212.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451210/normal_5fd83b3915802.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489850/normal_6046693021396.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451555/normal_6015819dc5c35.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483072/normal_6011fd47bf9dd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408479/normal_5fff47d605852.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460980/normal_5fcc615067f8c.pdfIn PDF document text
    • http://zavolofa.mygamesonline.org/9325290954.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452206/normal_5ffb56dc39885.pdfIn PDF document text
    • http://woberate.getenjoyment.net/68909315629.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
    • https://s3.amazonaws.com/rujimidujek/sojenubefakuwile.pdfIn PDF document text
    • http://fakuzilezozo.epizy.com/88940650392.pdfIn PDF document text
    • https://9e7b01ce-91ce-414a-93c5-ade8df4b7359.filesusr.com/ugd/cfbfd2_1ec734d4fac74e0f997fa49267cdc769.pdf?index=trueIn PDF document text
    • http://nizowozutagele.atwebpages.com/automate_the_boring_stuff_with_python_github.pdfIn PDF document text
    • https://s3.amazonaws.com/zabevog/lafesatugul.pdfIn PDF document text
    • https://s3.amazonaws.com/voxipanovigepiv/monarchs_and_milkweed_worksheet_answers.pdfIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_23124163a72549d0815643653fd11467.pdf?index=trueIn PDF document text
    • http://folijurojavagig.epizy.com/balubibami.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ebb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB9 5520 bytes
SHA-256: 32eed9d6b7f5273d21f76e54de5a3fd7980f35211315387c783d3504912faabd
font_01_sfnt_off0000fe7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE7E 10992 bytes
SHA-256: 5aa8a5990ea9c57b496c21635516f750096ccbf19f7dc55ed0d58340b16f95c0
font_02_sfnt_off000122e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122E7 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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