Malicious PDF — malware analysis report

Static analysis result for SHA-256 9019085963eda957…

MALICIOUS

PDF

102.7 KB Created: 2021-09-17 01:53:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6c3c36929b0b17bf825136de0036fd48 SHA-1: 2bff8555e378673fe0c36bff1801f574d73b7c64 SHA-256: 9019085963eda957375a00e256e179ff03b3416f2c7f1e884a6c12186b409e9c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ML classifiers and ClamAV as malicious. It contains numerous embedded URLs, many of which point to disposable domains, suggesting a link farm designed to obscure the ultimate destination. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically indicates this behavior, likely intended to lure users into downloading further malware or submitting sensitive information.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9961

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 http://andlupa.com/userfiles/file/33967393346.pdf In PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/53215944415.pdfIn PDF document text
    • http://htwy.com/upload/file/90473859446.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/6340fc97cd713790dfeb1f4075c137a8/kutuxiwivob.pdfIn PDF document text
    • http://soundspace.eu/Upload/file/24345179721.pdfIn PDF document text
    • http://aaz.sk/editor_uploads/files/80565523651.pdfIn PDF document text
    • http://hugslock.com/app/webroot/img/files/fisapizibet.pdfIn PDF document text
    • http://misosmile.com/upload/editor/files/midubepetugatirulidugimi.pdfIn PDF document text
    • https://rpaxis.net/userfiles/file/kegozidimizutezulosama.pdfIn PDF document text
    • http://pinzimoniofiumicino.eu/userfiles/files/42316971570.pdfIn PDF document text
    • http://taxfreepoint.com/file/zugorisa.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/72701677752.pdfIn PDF document text
    • https://oriental-kitchens.com/userfiles/files/bonijeg.pdfIn PDF document text
    • http://pinedafoundation.org/imageuploads/file/zirutuvovisiwafufirin.pdfIn PDF document text
    • https://tonwen.org/userfiles/file/rekupigidagefinasaribolun.pdfIn PDF document text
    • http://enovosti.info/ckfinder/userfiles/files/20242452424.pdfIn PDF document text
    • http://jagdrevier.hu/upload/images/file/dibifipamovivuxag.pdfIn PDF document text
    • https://sowlindia.com/userfiles/file/finebiluloposurakes.pdfIn PDF document text
    • http://fujiya-burbank.com/uploads/files/68584874702.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/18271577297.pdfIn PDF document text
    • https://visualarchive.bg/files/71760114087.pdfIn PDF document text
    • https://nucamsa.es/userfiles/files/41145566644.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/xajokawane.pdfIn PDF document text
    • https://bazk.info/public_htmluploads/file/14545846129.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=samsung+galaxy+tab+a6+firmware+downloadPDF link annotation
    • 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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012c3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C3E 17580 bytes
SHA-256: e8b5040abd7c7f45d04a3e6adeef5d3e71a85438398aa1b6aa488bfb002a7601
font_01_sfnt_off000159e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x159E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000171fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171FE 11484 bytes
SHA-256: 52f0d530ab3980d4c4574f4538e73028fa7d018e4e6f0d9b6446071c810a7b89

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