Malicious PDF — malware analysis report

Static analysis result for SHA-256 60336ff8eebe161d…

MALICIOUS

PDF

84.0 KB Created: 2021-09-16 01:01:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 516d802cb368a536dda56dc8f3f3d1d4 SHA-1: ce3e9c3ee877a4b89b63332e37d7dcdd6b62329c SHA-256: 60336ff8eebe161d1bb398c8020bacec1a759f1b7e17127df6c5ad2a8a1700b0
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to potentially malicious domains, and is flagged as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns suggest it's designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://middletonchambers.com/ckfinder/userfiles/files/rovuni.pdf In PDF document text
    • http://slhospital.com/upload/fckeditor/file/88181380631.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/161382819b16c6---xemasenetukagutunuse.pdfIn PDF document text
    • http://jfhconsultancy.nl/userfiles/files/mabovabozenesijivada.pdfIn PDF document text
    • http://npas.ru/pic/file/62578650736.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/71629127416.pdfIn PDF document text
    • http://dajuicebarus.com/uploads/files/48228945537.pdfIn PDF document text
    • http://boldogelet.hu/media/dusagorezajanus.pdfIn PDF document text
    • http://luchetti.it/userfiles/files/zamopida.pdfIn PDF document text
    • http://tjchenxing.com/filespath/files/20210904120658.pdfIn PDF document text
    • https://kimcert.com/E/file/nexepu.pdfIn PDF document text
    • http://dailymaydemtien.com/userfiles/files/vekorojadiladowukugigin.pdfIn PDF document text
    • https://sunnyvale.com/wysiwygfiles/file/veguvigejalure.pdfIn PDF document text
    • http://slstudio.it/userfiles/files/susudonogodanaloko.pdfIn PDF document text
    • http://jornalespacoaberto.com/app/webroot/datafiles/editor/files/kanoripuri.pdfIn PDF document text
    • http://tiszaikaland.hu/upload/file/57482662646.pdfIn PDF document text
    • http://www.w.radeton.cz/ckfinder/userfiles/files/retozuwukes.pdfIn PDF document text
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/30517547999.pdfIn PDF document text
    • http://czpohledavky.cz/userfiles/files/diful.pdfIn PDF document text
    • http://permagnet.com/upload_files/file/2109020232201366575tdkix.pdfIn PDF document text
    • http://hnkingdee.cn/Files/file/20219165417.pdfIn PDF document text
    • http://octapus.vn/images/uploads/files/ritatesudamaxakeganife.pdfIn PDF document text
    • http://smepil.com/ckeditor/userfiles/files/33690197692.pdfIn PDF document text
    • http://tachikawa-derma.biz/ckfinder/userfiles/files/fuxunibewevovolad.pdfIn PDF document text
    • https://jkmart.net/FCKFiles/File/vipiwo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=free+fire+lite+apk+2021PDF 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_off0000e40b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE40B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC22 10320 bytes
SHA-256: 107e5917bf3cc3f3fc1fb861e6f2d7f31adb8e8254394481215b45d0b53afe2d
font_02_sfnt_off00011390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11390 17968 bytes
SHA-256: 921b1901d51dc3609e9680a31a1c2492b36e6ea8b173876bc79f080d7935d3ad

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