Malicious PDF — malware analysis report

Static analysis result for SHA-256 b47828ae2aef1fed…

MALICIOUS

PDF

76.0 KB Created: 2021-03-25 13:00:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: dbed726d4f932424756d896ae55f8802 SHA-1: bfb274989e64ee34a83cc4fe61a8355bd70e20cd SHA-256: b47828ae2aef1fed87de3446a6617d35f4d17f824b63ea0d307fa48d5aec20b1
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL pointing to a domain associated with phishing and link farming. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content.

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://botokaw.ru/wix?keyword=2013+ap+microeconomics+multiple+choice+answers PDF link annotation
    • http://sakivometo.medianewsonline.com/87892792379.pdfIn PDF document text
    • http://sedouche.xyz/graphic_design_portfolio_layout_freegzpfl.pdfIn PDF document text
    • https://cdn.sqhk.co/rixutixim/ijHijhc/88392056410.pdfIn PDF document text
    • http://bukupiduge.mypressonline.com/89573108773.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407100/normal_5ffc1b97b7f63.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458635/normal_60303b0f9e096.pdfIn PDF document text
    • https://cdn.sqhk.co/tirewaku/HbhbhbM/86776867596.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/Kijyhaw/kofanezulatixi.pdfIn PDF document text
    • http://wuramegojuluz.mywebcommunity.org/nonosepu.pdfIn PDF document text
    • https://cdn.sqhk.co/resozasevej/ikPeFih/fafeden.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379043/normal_6044bd05ca064.pdfIn PDF document text
    • http://bikejesoxatelo.mygamesonline.org/pufaka.pdfIn PDF document text
    • http://passive-income.ru/35068310593v5rfx.pdfIn PDF document text
    • http://pearhaidhr.fun/53833399320lqk8i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480891/normal_6046893139826.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393790/normal_5fe42657d289c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ddb0fe67-a09a-413d-b59a-c21b1dde3186.filesusr.com/ugd/3f0e57_fe2ff23a004a47f9987c5dd71e5c329e.pdf?index=trueIn PDF document text
    • https://75a697d3-84f0-44cf-bab9-f05e37020c50.filesusr.com/ugd/7c3584_ff8ad38f87964be79544eb41ef81c450.pdf?index=trueIn PDF document text
    • https://03f57db0-fbcf-46ec-8713-21b5992b8512.filesusr.com/ugd/455f95_2a8be94dcf174207a3ac6fe4938087ba.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/2813961550.pdfIn PDF document text
    • https://0b609444-e5a2-4a7e-9779-a3c6bae51a53.filesusr.com/ugd/529dbf_9e24326d0a72476288a1f6e64a6a48e0.pdf?index=trueIn PDF document text
    • https://39ad70c8-6a03-4de2-a89b-b0209cba5754.filesusr.com/ugd/d2759c_0b3aebf3973d43f39e20dcc9f8b1b361.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/vokusim.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e717.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE717 5660 bytes
SHA-256: c7b14f41935272439d86a41077b0268758430e9d936610d7f43863aa50a8003a
font_01_sfnt_off0000fa3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA3C 11128 bytes
SHA-256: d1d9ebebac0e173cdb5f27c51100d535b42e29b03fe36571cf9ae9ba7aa65064

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