Malicious PDF — malware analysis report

Static analysis result for SHA-256 f080a85018d38f48…

MALICIOUS

PDF

70.2 KB Created: 2021-09-25 00:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: ba3d1bcaffe0cc8b00b7a68359071168 SHA-1: 150f801e819b7d94ff7615b3e7fdf9cfdc72be82 SHA-256: f080a85018d38f4800133da68789aac323cf154ad55aba5aab7ad25add97780e
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable hosting, indicative of a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to sites hosting malware or phishing content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' confirms the pattern of using numerous distinct, low-reputation hosts.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://allytemp.ru/uplcv?utm_term=fifa+20+mod+fifa+14+apk+obb PDF link annotation
    • https://vgi-vn.vn/app/webroot/img/files/mosodefuwurixixipajidol.pdfIn PDF document text
    • https://web-dev.ethioapp.com/websites/lightyearsahead/code/userfiles/files/xidelomojidokagule.pdfIn PDF document text
    • http://mudrkanuch.sk/editor_uploads/system/files/50215416266.pdfIn PDF document text
    • http://pizzeriadevita.it/userfiles/files/29870382875.pdfIn PDF document text
    • http://photou.cc/ckfinder/userfiles/files/55071143707.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613d82cb3c744---4682896138.pdfIn PDF document text
    • http://originalavto.ru/userfiles/file/gekanevupuzeburodar.pdfIn PDF document text
    • http://surveycook.com/upload/tmp/202109/file/sarimojemuzigose.pdfIn PDF document text
    • http://koyomisushi.com/uploads/files/78547869717.pdfIn PDF document text
    • http://hosungtour.net/FileData/ckfinder/files/20210909_D1E91A38DCB59DE6.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/50903400047.pdfIn PDF document text
    • https://oreopay58.com/ckfinder/userfiles/files/20856399741.pdfIn PDF document text
    • http://studiotecnicobergamaschi.it/userfiles/files/kuwipugeveloxiba.pdfIn PDF document text
    • https://nppmaudaha.in/ckfinder/userfiles/files/farepafovifupumiju.pdfIn PDF document text
    • https://agape4u.org/userfiles/file/tupototidosi.pdfIn PDF document text
    • http://nhactheducthammy.com/upload/files/wepelupexusozo.pdfIn PDF document text
    • http://www.donboscovizag.org/images/files/lagugipal.pdfIn PDF document text
    • http://zjnep.com/ckeditor/ckfinder/userfiles/files/xixupib.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/22147804848.pdfIn PDF document text
    • https://vibanghanoi.com/uploads/files/tevukujegabaxuna.pdfIn PDF document text
    • http://metabolit-plus.ru/files/file/33900199383.pdfIn PDF document text
    • http://exosushi.com/uploads/files/64022402130.pdfIn PDF document text
    • http://aromamahabaleshwar.com/ckfinder/userfiles/files/tujowaju.pdfIn PDF document text
    • http://ned.ru/uploads/files/8010887068.pdfIn PDF document text
    • http://rovitek.com/userfiles/file/notevoruron.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://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_off0000b041.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB041 17124 bytes
SHA-256: fd0eb1eee37c90529f2c08dc51aca830f9cd0ac025c61aa5279b383f57fdbac2
font_01_sfnt_off0000db52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB52 10592 bytes
SHA-256: a4f01cdee076bc27de2e7737765a8645ccbf2997a34e1f8c8a5ff4d832f6e0c4
font_02_sfnt_off0000f34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF34E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1