Malicious PDF — malware analysis report

Static analysis result for SHA-256 6909b0182624274f…

MALICIOUS

PDF

79.6 KB Created: 2021-09-05 11:04:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 246e07fd2e9d312badaf72b54770f5a2 SHA-1: 481aa783db0cce44e07a27a60a4d59ca428d4e0d SHA-256: 6909b0182624274f8bd8a2f6a493a706a34914377bab5af53afb273560a6642c
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to download PDFs from compromised CMS uploads and disposable hosting. The embedded URLs and the nature of the heuristics suggest a phishing lure, likely attempting to trick users into downloading further malware disguised as a PDF converter.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://aashianarealty.com/file/wumazapowozonofiv.pdf In PDF document text
    • http://goref.ru/files/file/59712397299.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/60bb8704847f5.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16075341d54df9---sikaduf.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/ce80acafbcced1fb7adeeed8fcdc613a/35354479202.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/7dbdafeb1c2420798ddcaae99c3264ef/walebesuxubope.pdfIn PDF document text
    • http://adveotec.com/img/file/25667552902.pdfIn PDF document text
    • http://gtlitalia.com/userfiles/files/wotizegigawep.pdfIn PDF document text
    • https://magiccat.pro/ckfinder/userfiles/files/ditageligokemukemoxezepo.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/iqlcmp7g1hrkqb1erp195uv442/loboxowu.pdfIn PDF document text
    • http://ducthanggroup.com/webroot/img/files/sikodobuwulituxewi.pdfIn PDF document text
    • http://silverk.ru/img/lib/file/99552692757.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/8699b409dceb9bf0e00b150417ffe8f3/xilusibapevituzob.pdfIn PDF document text
    • http://www.adanakursmerkezi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8ee7268bf---kexesuzupivevogupowaga.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/1610bef55e1db0---72607951534.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/16094e53822c83---55789087790.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/493bbeb71005215353739a9c4854861c/69699507568.pdfIn PDF document text
    • http://wjcopy.com/upload/files/vogaxoxilel.pdfIn PDF document text
    • https://atiksigorta.com/files/18381218808.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa73875c987---82893792182.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/67335461857.pdfIn PDF document text
    • http://grandchainfamilyfoundation.org/clients/85333/File/ludalumekebodawifoxa.pdfIn PDF document text
    • http://tomaszfilipczak.pl/userfiles/file/nijevewurisuguk.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=pdf+converter+professional+8.1+free+downloadPDF 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_off0000d17d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD17D 17344 bytes
SHA-256: 08bdb49a7bde83584040e41c922c47a3c7f35b37a35814bac5ad269b0dc43d5d
font_01_sfnt_off0000fe73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE73 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001168a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1168A 11092 bytes
SHA-256: 242b466c77ffd59020abd0127173a139b7591c390cdb534e5f2c22f4609f78a6

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