Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bc9db08bebabc2a…

MALICIOUS

PDF

77.8 KB Created: 2021-09-20 05:18:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f8591e4df49fc416e2994309d551d20c SHA-1: 1b295c90447f4a66a7cda158ee0059d3ad72e9a5 SHA-256: 2bc9db08bebabc2a78662b4c36a53fe6cf57538429b4a7d98a38be41add4f7a4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous embedded URLs that function as a link farm, directing users to various external websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the link farm and the presence of compromised CMS upload links suggest an attempt to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://philabc.ru/uplcv?utm_term=how+to+stop+worrying+and+start+living+book+pdf PDF link annotation
    • http://tahyuh.com/uploads/files/202109031020171673.pdfIn PDF document text
    • https://alcc.c-zentrix.com/ALCC/mail_attachments/multitenant-ws-01/1/1632049576.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/65853874168.pdfIn PDF document text
    • http://maryalo.com/userData/board/file/76149588636.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/kesoruditesajovagak.pdfIn PDF document text
    • http://music-saikung.com/ckfinder/userfiles/files/91392547222.pdfIn PDF document text
    • http://trust-law-firm.com/userfiles/file/20210907091249_94564800.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c770b816b2---97799282702.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/72831555171.pdfIn PDF document text
    • http://www.americaninvest.net/upls/files/31878485140.pdfIn PDF document text
    • http://fgsconsulta.com.br/ckfinder/uploads/userfiles/files/95558197626.pdfIn PDF document text
    • https://marathonblainville.com/userfiles/files/51977019739.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-9-4/20210904105222320919.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/98516195432.pdfIn PDF document text
    • https://master.plus/wp-content/plugins/super-forms/uploads/php/files/5b692c9911bdcbb9dd66537498574e7a/rirewumulidirewekesi.pdfIn PDF document text
    • http://heldermusic.nl/ckfinder/userfiles/files/zusinasojosamuled.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132944e6ed3a---namaxufitoxutevigeva.pdfIn PDF document text
    • http://dawahcity.com/userfiles/file/28477996192.pdfIn PDF document text
    • http://thepokewave.com/uploads/files/movexim.pdfIn PDF document text
    • http://edv-denk.com/userfiles/file/gususakenulopotenejijir.pdfIn PDF document text
    • https://oriontradecom.com/ckfinder/userfiles/files/11701820654.pdfIn PDF document text
    • http://aucontecnologia.com/userfiles/files/10046184809.pdfIn PDF document text
    • https://asiatravel.kg/wp-content/plugins/super-forms/uploads/php/files/cf5e43a588ce03b415e5b856065e1ae2/1974615511.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/obvaq0ublqi7ell4nonvo5030t/41251710585.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_off0000ca16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA16 17704 bytes
SHA-256: 0a8830ff19042a488aa62df62a52744235e44918c93d20c363ad299c4eb8f4f8
font_01_sfnt_off0000f824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF824 11032 bytes
SHA-256: 41c8e225f4e2ac5962918104a85dfb6a985e2d9ebe50fd1c6896c2bef635d7c2
font_02_sfnt_off0001118a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1118A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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