Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa235ec813a3e8c2…

MALICIOUS

PDF

83.5 KB Created: 2021-09-21 08:58:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e2092db15ec6da308cc69355bbbaa2e0 SHA-1: 677365320894fb160e9db71a8fd513a444c7377e SHA-256: fa235ec813a3e8c2880b100aa6a92428612d5a1586c76c48fb61aee341b62e2b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised websites and disposable hosting, indicative of a link farm designed to lure users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery. The presence of external URIs and link farms points towards an attempt to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://krcatikyonetimi.com/userfiles/file/93415405871.pdf In PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139ddeaebb9e.pdfIn PDF document text
    • http://vetranhtuong.info/luutru/files/wawojepelenifipupi.pdfIn PDF document text
    • http://dioblina.eu/userfiles/file/48507848042.pdfIn PDF document text
    • https://apsco.ly/userfiles/files/zoxeluza.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16135ba1b0f2fc---dikezenanovibo.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132f85562807---26245328160.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/61980065671.pdfIn PDF document text
    • https://it-remarketing.pl/app/webroot/media/files/kipaf.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613f5c1a638a1---29566657378.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/8djv1rkvr1v0gp3jr22gdn8pm1/mijufuxemazogawomorugabid.pdfIn PDF document text
    • http://szwygs.com/upload/70375324796.pdfIn PDF document text
    • http://kerama.altrodesign.eu/ckfinder/userfiles/files/79811132482.pdfIn PDF document text
    • http://cjmfgxfollow.morefriendship.com/upload/files/lelujunonupozotu.pdfIn PDF document text
    • http://xn--90afqerdlt1f.xn--p1ai/admin/ckfinder/userfiles/files/7245951981.pdfIn PDF document text
    • http://mylodge-naoshima.com/33669846686.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136a51e54f28---kigotozudofutejam.pdfIn PDF document text
    • http://gitishahjahanpur.org/ckfinder/userfiles/files/43800693072.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/96315850891.pdfIn PDF document text
    • http://wangyiphk.com/userfiles/55028968884.pdfIn PDF document text
    • http://skontrolsengineering.com/file_media/file_image/file/sukogu.pdfIn PDF document text
    • https://mkontroll.hu/File/13527394951.pdfIn PDF document text
    • http://autofox.lt/ckfinder/userfiles/files/riwajo.pdfIn PDF document text
    • http://namhungholdings.com/uploads/ckfinder/files/73178110194.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=video+tube+player+download+apkPDF 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_off0000e2d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D4 10720 bytes
SHA-256: b0a75e17d6442ab806c92a383042cf2f1ad880a2501a9c8fa20fcb13a4c738c4
font_01_sfnt_off0000fb5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5A 17324 bytes
SHA-256: aeed18f2562a6052184391bd87df8da95e72affb4a0f42852b0d03ad8dfcdb87
font_02_sfnt_off00012864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12864 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.