Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c00ce4bc6fee14a…

MALICIOUS

PDF

86.7 KB Created: 2021-08-07 20:35:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 173dbe1f47e463cd3332e16c6c1e16cf SHA-1: 23522f22553781cefffb52f614af0f3d6dcfc307 SHA-256: 7c00ce4bc6fee14ac31c78c9678698a62512170e8a1aa48e770eee7fc0887220
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of links, many pointing to compromised CMS upload directories, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://timesofbangla.com/uploads/files/85652586911.pdf In PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/717cd352696da968708fc74192162a0b/kiwafekatopel.pdfIn PDF document text
    • http://elonsummerstorage.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5bfee06de---gawupewotovejes.pdfIn PDF document text
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/9ba02d9d0a1a627cd533eb6c10e0ab25/doxem.pdfIn PDF document text
    • https://www.marthatrotts.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160cc0e718e094---22951156668.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/jvejiuel5cjoh4jn6k8t83g05f/19542186721.pdfIn PDF document text
    • http://mouaumfb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97791f0fb3---70170638260.pdfIn PDF document text
    • http://dom-2000.ru/ckfinder/userfiles/files/63654639977.pdfIn PDF document text
    • https://tehnol.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16091737fbe9e0---87304613322.pdfIn PDF document text
    • http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a13e7289365---wurunage.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/84c6fe833aae8c8b762ec6f49000030e/domujimegeluwe.pdfIn PDF document text
    • http://wagnerfamilyreunion.com/clients/866685/File/jower.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/527f9ee41db80192c1f2b19b6ea99ff5/pegawe.pdfIn PDF document text
    • http://suaups.net/userfiles/file/58342905838.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/fopunikurewuxojebesusejad.pdfIn PDF document text
    • http://logiccpacma.com/ckfinder/userfiles/files/dilawupikanurotawawa.pdfIn PDF document text
    • http://novelinternationalschool.com/ckfinder/userfiles/files/vukuromatabofurike.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/pelakanus.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/21f00ae857ce9f078d136e966722bbb7/tapawazujopawob.pdfIn PDF document text
    • http://gps-ambroisie.com/ressource/site-image/files/tudasutufuwakadodarufi.pdfIn PDF document text
    • http://mastervgtour.by/var/upload/file/23432534448.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/bab254b01c583b150d4bf17be4d367db/29412416918.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/50cfd6a6a0d1bb149a57818bebb8a003/96367939064.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=new+nagpuri+song+2019+dj+remix+video+dancePDF 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_off0000ed4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED4A 16688 bytes
SHA-256: 91e20b6b697703639d51ce6162c49a9eb4c645a966b7fdea31a897ded652e68c
font_01_sfnt_off00011875.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11875 11636 bytes
SHA-256: a24241662149714b4d55a90dea6f8e3b30c9dfa9ebbfc89a988d6fd09f34c07d
font_02_sfnt_off00013407.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13407 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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