Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee1df3595ad0963…

MALICIOUS

PDF

78.1 KB Created: 2021-07-02 23:47:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 71272fc6d123fe7a8d3e53cab89dfece SHA-1: 25fabc2b1e8205ef529c91e36c61baddfd7d9acf SHA-256: 4ee1df3595ad0963cb5f22ec046f30b3e94753f1e4d7ed035f18ce95e53d94c6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript, which is a common technique for executing malicious code. The sample also features a link farm pointing to compromised WordPress upload storage and other disposable hosting, indicating an attempt to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

Heuristics 7

  • 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.
  • 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 http://peaceinsrilanka.lk/userfiles/file/64598825642.pdf In PDF document text
    • http://blow-w124.com/js/upload/files/81442654881.pdfIn PDF document text
    • http://focostrade.com/files/20210624161202.pdfIn PDF document text
    • http://pomocnaukowa.net/Upload/file/fotupovaradi.pdfIn PDF document text
    • http://salonorganica.ru/upload/files/tajosavobusevorerew.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608033c91ee03---39157187866.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da692f745d4---33553641777.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/b232cbcee5f225e9711fb34c2366e8c6/98046172392.pdfIn PDF document text
    • https://indacphuc.com/wp-content/plugins/super-forms/uploads/php/files/6kpmivtsugd6m2sv85e3qgssqu/jivinewonose.pdfIn PDF document text
    • http://thangmayedex.com/webroot/img/files/difewilewulilarusotexaj.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/blgheur6pq3i8jlhmp5nu74k85/sinubalovite.pdfIn PDF document text
    • http://vankouwenenmastop.nl/UserFiles/file/68531510462.pdfIn PDF document text
    • http://gphs100.com/clients/e/e3/e3ed30f4e85b1ff1e74f61348c82e8eb/File/pololu.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16085d8d981faf---mofumotolenajuwafaxevidar.pdfIn PDF document text
    • http://oxigensupplies.com/shipinc/userfiles/files/33376138298.pdfIn PDF document text
    • https://www.citysecurity.org.uk/wp-content/plugins/super-forms/uploads/php/files/5k7utkg0d5tgeqcr0vekjn61r3/dakefugeravojumakuz.pdfIn PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/u5saa0qjou36rt1jh8susf6jd7/4221122925.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160a04fe84c277---91361827312.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/44049506335.pdfIn PDF document text
    • https://infrastone.com/userfiles/files/turamakanuzukur.pdfIn PDF document text
    • https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/b77ehrg7vnt652m8kpplmhnmr6/37127502619.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=our+god+is+greater+lyrics+chordsPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b20e400081d---jajifeneximevubizel.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_off0000cdaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5C6 10784 bytes
SHA-256: 3a40758c64ad909332b8322f8e8aa3efa9a5e330fd2f51e45595350b0601de52
font_02_sfnt_off0000fe95.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE95 17260 bytes
SHA-256: 77b7bd3391185059eff38cbcc1e92455228ade88e7a011c27791a0e915f1fb9b

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