Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a9ceabc97bbe414…

MALICIOUS

PDF

91.3 KB Created: 2021-07-26 04:23:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-18
MD5: 124b4b46f741a9f3648986de02f54e5c SHA-1: e56c860940f70449131a62c9d0b1bf9b70d87bbc SHA-256: 3a9ceabc97bbe414ba7b12b2e8b41a14e13f29be0aa6f8c3b6a255e956865017
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9876

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://otoozevran.com/resimler/files/96961539416.pdf In PDF document text
    • https://alate.org/admin/fckeditor/editorfile/27255921086.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/63e4cc84b5774730e3498d09962a7977/78957059955.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/3kr3smnbgh6bitb352n3e33oin/4326538137.pdfIn PDF document text
    • http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/160af6a946201e---gobes.pdfIn PDF document text
    • http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16071120ca1962---62805649890.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/cc8022afc5da552304b8c80d6f1ba82f/lovogufinozofulefozaxew.pdfIn PDF document text
    • http://pincailight.com/zk/UploadFile/file/2021062911380173499.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b64798454---96209029037.pdfIn PDF document text
    • http://sozopolihills.com/userfiles/file/97434690457.pdfIn PDF document text
    • https://llsindia.in/FCKeditor/file/dovolux.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/geduduji.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/51f0e922d244df2af48e7841a0ee191e/fuwosaxevisudagod.pdfIn PDF document text
    • http://jp-cable.com/d/files/88995914931.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/1d24c508846e9ca462f9ae863153af5b/59877586817.pdfIn PDF document text
    • http://hobbstownis100.com/clients/6/66/66141d04a4341350d76ae3a38785cb5a/File/32468773905.pdfIn PDF document text
    • http://hoaisonland.vn/upload/files/sigesiditejirepovonotomen.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed1ada2601d---nibetezawa.pdfIn PDF document text
    • https://3dreamstudios.com/wp-content/plugins/super-forms/uploads/php/files/a8e7b49b362c53478a77ee26dd2595b4/11959299534.pdfIn PDF document text
    • http://espacioschillout.es/images/admin/file/fukazabivazazomik.pdfIn PDF document text
    • https://nacionalequipamentos.com/ckeditor/uploads/files/rudomugulujusap.pdfIn PDF document text
    • http://www.microsinusectomi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083c8e54570e---xisoja.pdfIn PDF document text
    • https://csom.cz/wp-content/plugins/super-forms/uploads/php/files/4f2173cae2651737da2d2f5d10924f96/21547062859.pdfIn PDF document text
    • https://transport-vehicules.fr/userfiles/file/57856130889.pdfIn PDF document text
    • http://aisef.org/uploads/userfiles/file/file/xefegut.pdfIn PDF document text
    • https://bindazzled.com.au/wp-content/plugins/super-forms/uploads/php/files/6bc95579ffee574b1945e186712725a9/76185980573.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=what+is+the+best+app+to+download+videos+from+instagramPDF 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_off0000fdb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB0 11228 bytes
SHA-256: 267b8fdb30fcc77ba2b81e1a505eed27c9ec523508954ca76decbae76b81b7b6
font_01_sfnt_off00011766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11766 17700 bytes
SHA-256: 0752c4d4d677251e2b1a5bbd61b6040a59448b3b479c8fb75a730a698ac03cd9
font_02_sfnt_off00014586.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14586 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1