Malicious PDF — malware analysis report

Static analysis result for SHA-256 418c9cfb82c89f3a…

MALICIOUS

PDF

91.4 KB Created: 2021-09-02 09:29:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1556aabff859f165217962a279eeb21b SHA-1: 3c5b9fa5e84dbb2359a50d8b00a9446e105e189f SHA-256: 418c9cfb82c89f3a9ce1e1e9c4d81e20e651e6349b6c773e0f912a1d0495ca5d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised websites and link farms, suggesting a phishing or credential harvesting campaign. The file's structure and embedded content indicate it is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://huntic.ru/uplcv?utm_term=posing+meaning+in+bengali PDF link annotation
    • https://khonggiansachhanoi.vn/uploads/files/regozekubuwebalaka.pdfIn PDF document text
    • http://promador.pl/userfiles/file/37181591958.pdfIn PDF document text
    • http://africansafaris-spain.com/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/73046232567.pdfIn PDF document text
    • https://www.abaco-engineering.it/wp-content/plugins/formcraft/file-upload/server/content/files/160767ee009fa8---33294123914.pdfIn PDF document text
    • http://shopcloud.cloud/ckfinder/userfiles/files/6115835827.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160acf15f634f6---14956369621.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/e515886f1755a2735718cd5dc907d59e/ratawijirexeluw.pdfIn PDF document text
    • http://efuturesthai.com/uploads/file/gidalemewenini.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/86672785565.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0237444de40ed90e1690f7631775ad54/35238562555.pdfIn PDF document text
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160877bad91cb7---tunaripiranuxi.pdfIn PDF document text
    • http://ogbchurch.com/clients/880797/File/jebazajutegosazila.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd4a667add---18735509412.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba32b9a2c43---54995470756.pdfIn PDF document text
    • http://brixtontaxi.com/survey/userfiles/files/84824156344.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c368927110---rujowuzazotapidetopeb.pdfIn PDF document text
    • http://manhchenang.vn/webroot/img/files/gamaxenopezi.pdfIn PDF document text
    • http://matrixuniverzum.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160ab0a400f45c---4578195424.pdfIn PDF document text
    • http://sonsuadogo.org/Images_upload/files/13905600299.pdfIn PDF document text
    • http://www.vishalsahni.com/public/ckfinder/userfiles/files/71578074589.pdfIn PDF document text
    • https://tfnd.org/wp-content/plugins/super-forms/uploads/php/files/279f64c4bab414bc1735b2081c43b5a9/fajadekifepoxi.pdfIn PDF document text
    • http://srividyaastrology.com/userfiles/file/61496025288.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/lkc0f6brli8fln0308s8rpv6h6/wivodakovozajakejenuwux.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16085cfe108a93---kenuzosomimejoka.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off0000e5d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE5D6 17428 bytes
SHA-256: 6c543bdce7f58387c32bee4bd66e84fc0cc4df94218b1b27585e1bf8202d7dc4
font_00_sfnt_off0000ce5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5F 10392 bytes
SHA-256: b13ff6b860991887559dcc9bcbfe497762383bf5d47a6ec033755912e63a427d
font_02_sfnt_off0000ffe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000117f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117F2 1888 bytes
SHA-256: 228445a3744f13af4bf84041e55802a923554d86926eb0745489ea117e4ab105
font_04_sfnt_off000120b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120B7 24252 bytes
SHA-256: 7ba2c5afc39ce0aa7d31e512c4d4351cf49b78217b700b05967b6172a771a5a3

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