Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9cac2ef78fc49d…

MALICIOUS

PDF

76.7 KB Created: 2021-09-18 13:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 6430b7d816016c8ac070a6b67b10cf3d SHA-1: 2d05a90a465369aad3ebb42bc42985663a23e85c SHA-256: 6e9cac2ef78fc49d5402f7d782716f8b01da8a9ee786794867cc476a72f8a5a9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file contains a link farm pointing to numerous websites, many of which are hosted on compromised CMS uploads or disposable domains, suggesting an intent to distribute phishing content or malware. No scripts were extracted, but the overall structure and heuristic firings strongly indicate a malicious intent to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • 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://dcoderesearch.com/uploads/veporanitovosonepe.pdf In PDF document text
    • http://stepasidemedical.ie/images/uploads/file/26699916763.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16136bb097fde3---27882253432.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/bobopunidalijijididaj.pdfIn PDF document text
    • https://bluetact.com/locktactyuma/userfiles/file/65261044243.pdfIn PDF document text
    • http://consoles-a-gagner.com/fckeditor/userfiles/file/marilafuwi.pdfIn PDF document text
    • https://eduinfinite.com/wp-content/plugins/super-forms/uploads/php/files/a663ec4c32d55923e6e1e1eda2dd47f1/78068417242.pdfIn PDF document text
    • http://skonasystems.com/userfiles/file/23566423521.pdfIn PDF document text
    • http://amadpich.com/userfiles/file/binenirinewejorijerab.pdfIn PDF document text
    • https://5ky13lu3-1251.com/contents/files/xojusazoled.pdfIn PDF document text
    • https://satnamunicipalcorporation.com/admin/ckfinder/userfiles/files/16452869067.pdfIn PDF document text
    • https://cfacgroup.com/uploads/FCK_files/file/koviriberufemepukiw.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/94441178452.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6a43788af---53213292951.pdfIn PDF document text
    • http://kursverwaltung.fit-n-essen.ch/ckfinder/userfiles/files/1128053911.pdfIn PDF document text
    • http://baoveantam.org/upload/files/93057692587.pdfIn PDF document text
    • http://louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/65719853560.pdfIn PDF document text
    • https://digireg.com/upload/bozalatoroxogagorusakukam.pdfIn PDF document text
    • https://advantagelic.com/singhania/downloads/file/2342467506.pdfIn PDF document text
    • https://eastoncn.housemember.com/uploads/files/15936703663.pdfIn PDF document text
    • https://hoalavender.net/upload/files/furumizabiwakusogilabufex.pdfIn PDF document text
    • https://glasschneider.koeln/wp-content/plugins/super-forms/uploads/php/files/ju0h58si059l5kv45l4vgfcnq0/52853097465.pdfIn PDF document text
    • http://nickels.design/ckfinder/userfiles/files/xutifozifanokiwuzexe.pdfIn PDF document text
    • http://ues-rb.ru/themes/ues-rb.ru/files/55808344544.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/161329d637b225---18041603743.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=index+of+apk+modPDF 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_off0000c864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC864 10300 bytes
SHA-256: fecc29e3fbbb8e7358fd1c42e40d8a1e1653642963f1c52774713a40cfa03cab
font_01_sfnt_off0000df96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f7a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7A8 17456 bytes
SHA-256: 8809e5a81d3f10fefc2b135c55dee56b66a1fe617e9c947dfe2f119016ca3194