Malicious PDF — malware analysis report

Static analysis result for SHA-256 32eb172c38baa3ef…

MALICIOUS

PDF

86.4 KB Created: 2021-08-09 06:46:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 360b01f5a94e4880c8fef7d524207104 SHA-1: d992b4203bab74e9e8d0f0629bc0eaaab514124b SHA-256: 32eb172c38baa3efb3c0115af319948f8f810f693a1e18e78948dd2cdd6d84ec
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous URLs pointing to compromised WordPress sites, likely to obscure the final malicious destination. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics confirms this behavior, suggesting the document is designed to lure users into clicking through to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pistant.ru/uplcv?utm_term=bmobile+sim+card+expired PDF link annotation
    • http://barcabianca.eu/upload/file/15726618751.pdfIn PDF document text
    • https://foundryindia.org/userfiles/file/69532694106.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/bb6ed430d4fca0f8f64332ac68daa667/xojasite.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092efe56e365---69786237013.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/25870962503e22942160f3ef4b3a9e42/39526906865.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160fcb6444fe70---12861476934.pdfIn PDF document text
    • http://apnschool.in/singhania/downloads/file/voxibapiwomikijom.pdfIn PDF document text
    • https://psg66.ru/admin/ckfinder/userfiles/files/mebesitujekipovutesetev.pdfIn PDF document text
    • http://vudafrique.com/wp-content/plugins/super-forms/uploads/php/files/b9f77dd24b37798c90488a0de21aad48/99006204403.pdfIn PDF document text
    • https://n-v-v.dk/userfiles/file/10862996079.pdfIn PDF document text
    • https://service-panev.com/userfiles/ruxakarigomaju.pdfIn PDF document text
    • http://timebank.ru/sites/default/files/photos/pagefile/zesuburaloxajopux.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/p3mo3grp9059fe0p41dk5ge8cv/lezibudalidasukunisi.pdfIn PDF document text
    • https://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609adb0de7be0---11934876773.pdfIn PDF document text
    • https://ratco-hardware.com/Ups/files/fajodejuwujegegubuw.pdfIn PDF document text
    • http://www.redactordecontenidos.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160a4d10f0a2f3---xipaparos.pdfIn PDF document text
    • http://rzn-house.ru/upload/file/meturubaw.pdfIn PDF document text
    • http://thebeautyofdesign.nl/ckfinder/userfiles/files/kujidilavuruvuso.pdfIn PDF document text
    • http://tentimesneedlehill.com/UPFILE/userfiles/files/fariwomegudenajonido.pdfIn PDF document text
    • http://sehs67.com/clients/e/e0/e078d4d0076166a7bb489ca3b3a583ab/File/wanofadoga.pdfIn PDF document text
    • http://maihome.hu/admin1/file/zafoxuga.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/ulltv7g6mujf6l2qe1fsaufe4f/31892973563.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_off0000ee8c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE8C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000106a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106A3 10768 bytes
SHA-256: 6b6efaf9e3d2646ae724cb4c1cb674d3bcf107dd2de461164ebc7bd8f6b2f4d1
font_02_sfnt_off00011f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F37 16924 bytes
SHA-256: 4c19be508ce612b92a241abe831e76322f399058f629319083d07919bea2cf74

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