Malicious PDF — malware analysis report

Static analysis result for SHA-256 4c111417ed444784…

MALICIOUS

PDF

73.6 KB Created: 2021-09-26 23:28:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 14f472943ba65d7488b148f65d975612 SHA-1: eca3d705bc78fded02649979e7da7406a653ff18 SHA-256: 4c111417ed4447840529c4071405a3f01a074311b16f2d80fd990cc9b6de1522
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm, likely to distribute malicious content or phish users. The embedded JavaScript suggests an attempt to execute code, potentially to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://infrive.ru/uplcv?utm_term=tempo+fit+android+app PDF link annotation
    • https://salvamontbihor.ro/app/webroot/files/userfiles/files/79997438501.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140e8d9d253e---bapuwisod.pdfIn PDF document text
    • https://martensmgt.com/business_school/uploads/file/vugokabise.pdfIn PDF document text
    • https://sledovani2.gpshlidac.cz/www/userfiles/files/27073400796.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/af426023013e8d895fac3e9c8d2c5544/83305160276.pdfIn PDF document text
    • http://www.niceresidence.net/image/upload/File/redolusokidowali.pdfIn PDF document text
    • https://stpm-sa.com/userfiles/file/bozedujufojofarubenomu.pdfIn PDF document text
    • http://fusheng-vietnam.vn/admin/webroot/upload/image/files/80776334523.pdfIn PDF document text
    • https://koncnc.com/genelresimler/file/56057548423.pdfIn PDF document text
    • http://cappellastudio.it/userfiles/files/darowem.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image/files/23282268456.pdfIn PDF document text
    • https://a-metal.e-giant.net/archive/file/files/88320296592.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/1613527612b001---62257256167.pdfIn PDF document text
    • http://lulanjina.net/upload/files/20219644966.pdfIn PDF document text
    • http://kozszemle.hu/uploads/files/sajujelonodo.pdfIn PDF document text
    • https://plagij.at/ckfinder/userfiles/files/valunopusukeg.pdfIn PDF document text
    • http://huh.hu/UserFiles/File/dinidukutojafugagow.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee9ef459dd---rimomoz.pdfIn PDF document text
    • http://ksklinika.ru/ckfinder/userfiles/files/tarofasokiwunulogo.pdfIn PDF document text
    • http://stomerijindex.nl/images/uploads/sajirasagikele.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/871a3fa0de13a7429e71898ae222f6cb/furese.pdfIn PDF document text
    • http://tid.vn/upload/files/85795061232.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/bipudinixegasasozum.pdfIn PDF document text
    • http://www.cst.rnu.tn/js/ckfinder/userfiles/files/norawavoxen.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_off0000b85f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB85F 18252 bytes
SHA-256: 3bbaaaee2fc2b0df8f77aa6960e5db8ee552a9c1145e7aec6434ec97ac80db37
font_01_sfnt_off0000e7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ffd2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD2 10408 bytes
SHA-256: f55c3be02ec0d11fec1dfe017260e1bf3de102e58fce2de62b9aa5a37f73c542

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