Malicious PDF — malware analysis report

Static analysis result for SHA-256 d454ea97ccb448df…

MALICIOUS

PDF

87.3 KB Created: 2021-09-22 12:23:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0852185b970f02924916290e095ffc82 SHA-1: 86991d31a4f8481df94bb315c9493a9adc2e51a8 SHA-256: d454ea97ccb448df5be12c9b9c7af12b746d8f969a1c2ee95eea99228b40b953
196 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing lure, specifically designed to harvest credentials or abuse multi-factor authentication. The presence of numerous links, many pointing to disposable hosting or compromised CMS uploads, suggests an attempt to redirect users to malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the exploitation of PDF vulnerabilities to execute further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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://pass38.com/images/contentimages/files/ronatubisara.pdf In PDF document text
    • http://onnetsolution.in/userfiles/file/78175776369.pdfIn PDF document text
    • http://louisefarmersmith.com/admin/ckeditor/ckfinder/userfiles/files/20135731274.pdfIn PDF document text
    • https://cargotavio.ru/files/file/26097617817.pdfIn PDF document text
    • http://chanhungcorp.com/images/uploads/files/noduvaxesifavowutide.pdfIn PDF document text
    • http://hoadon-dientu.net/images/files/guwugizibagesufik.pdfIn PDF document text
    • http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16146434f14b1b---vupidizipefawulevope.pdfIn PDF document text
    • http://boki.hu/editor_up/95290527837.pdfIn PDF document text
    • http://bakefruit.com/uploads/files/202109082346165698.pdfIn PDF document text
    • http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16135f3acb504b---gasalumilokanevuvawomusib.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/zunazidotemaloloworime.pdfIn PDF document text
    • https://slotpt2.com/contents/files/76178459848.pdfIn PDF document text
    • http://hybsch.it/upload/file/datowirilafalijakadudabo.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/sufosupekudirupewuxikuzeg.pdfIn PDF document text
    • http://etabetasurvey.com/userfiles/files/99368841240.pdfIn PDF document text
    • https://groupunsur2.com/contents/files/modinagijarinava.pdfIn PDF document text
    • https://mamadona.ru/ckfinder/userfiles/files/17296011506.pdfIn PDF document text
    • http://ituor.ir/basefile/chartermeinfo/files/mejatuvuxavudoviganaru.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb2994a891---monuruvatevevox.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210920045852986.pdfIn PDF document text
    • http://edukoc.net/userData/ebizro_board/file/zikezifefegojopegewoxexob.pdfIn PDF document text
    • https://festivaldelmaridaje.com/sgi_userfiles/userfiles/files/30522126248.pdfIn PDF document text
    • https://g55net.com/webpagebuilder/ckfinder/userfiles/files/zujewuti.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=how+to+delete+unused+data+on+androidPDF 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_off0000ec80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC80 19732 bytes
SHA-256: 10cde965d7e50e2edc411e5b01a4d1da1e0c92e735d1677e30108a415298374d
font_01_sfnt_off00011f6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F6D 10416 bytes
SHA-256: d00870b9ab64371151e00b30987da41bc8bffc05ba03771800f21788f0156313
font_02_sfnt_off00013729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13729 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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