Malicious PDF — malware analysis report

Static analysis result for SHA-256 1aaf94173d9f9a01…

MALICIOUS

PDF

85.1 KB Created: 2021-08-27 01:17:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e5aa6d0c52607cdd1f663cd95e811f96 SHA-1: c9ed2efec5a081e181335865bfd802b23d3a3b35 SHA-256: 1aaf94173d9f9a0195393e3f06500489493777289e8394959339f7388b6c313c
156 Risk Score

Malware Insights

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

The PDF contains a large number of links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://tramtron.vn/uploads/files/files/tebomusu.pdf In PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160895cd33ab78---75350046006.pdfIn PDF document text
    • http://huiking.cn/uploads/file/070241113990.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/mitibafanuvixuku.pdfIn PDF document text
    • https://www.lenoir-elec.com/wp-content/plugins/super-forms/uploads/php/files/39hs1gamss45qh6tss5unrb4q1/gugige.pdfIn PDF document text
    • https://woodfur.in/userfiles/file/kipanapobiles.pdfIn PDF document text
    • http://oaklandscreche.ie/userfiles/files/pufupawimemap.pdfIn PDF document text
    • http://pnmanagementsolutions.in/uploads/14608829155.pdfIn PDF document text
    • http://nanoscopy.ru/uploads/files/63303694417.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1609edf7dd2d88---64593316593.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/15135953264.pdfIn PDF document text
    • http://www.kidnuri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4f72bb16af---gadifalizopigezopisowufod.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609ff39dd2203---tuwagopilojubitab.pdfIn PDF document text
    • http://dodici12.ru/wp-content/plugins/super-forms/uploads/php/files/tkifos7jmc3e6m90h4l45bv4f4/jijamegomokulajesorapex.pdfIn PDF document text
    • https://chambres-hotes-aube-bleue.fr/userfiles/file/86410395124.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16077cbe1d3c3a---segajid.pdfIn PDF document text
    • http://techscreening.com/userfiles/files/97631938576.pdfIn PDF document text
    • http://cosmickino.ru/sadm_files/towiziv.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/160c63e29b01e4---68911326724.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/povodofexod.pdfIn PDF document text
    • https://saksisan.com/upload/ckfinder/files/fuferalazovofonosom.pdfIn PDF document text
    • https://keluargamimpi.com/contents//files/mugobavomile.pdfIn PDF document text
    • http://travellightnepal.com/userfiles/file/tibikiwewokotamopiluxisav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=funny+flirts+for+herPDF 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_off0000ebdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDD 17024 bytes
SHA-256: d9da37a153cc2dbe59a8537d69666ac1002ff0b562b7bd7ec5c3232fd9db3d05
font_01_sfnt_off000117f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001300f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1300F 10340 bytes
SHA-256: f708649778fd884a94ec2d93cc401e164aac1b40ce9492ef7225f39641e43eed

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