Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb408a3244f50a7a…

MALICIOUS

PDF

84.2 KB Created: 2021-09-15 12:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: b3fc36c551b31c886abd321b5929375d SHA-1: 3b4cb7f82daf0021f2f80e772d7e67720f21c33e SHA-256: eb408a3244f50a7ace51d600c6e6883b4481d254d4d5b343147df79468317b5e
186 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs and heuristics indicate it is a payment redirection lure, suggesting a business email compromise attack. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are designed to lead the user to external malicious sites, likely for financial fraud.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://archism.ru/uplcv?utm_term=how+to+send+my+contacts+from+android+to+iphone PDF link annotation
    • http://tgroupsrl.com/userfiles/files/92026413466.pdfIn PDF document text
    • http://izeninfo.net/admin/upload/files/dipesabutujewabutewo.pdfIn PDF document text
    • http://whatdwellswithin.com/file/35279443971.pdfIn PDF document text
    • http://www.plain-pied.com/editeur/ckfinder/userfiles/files/41819879688.pdfIn PDF document text
    • http://trovas.com/userimages/49309255481.pdfIn PDF document text
    • http://kenshopvn.com/uploads/files/54033967046.pdfIn PDF document text
    • https://skywaynepal.com/userfiles/file/sazivoxa.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1614111bb9c995---57413080462.pdfIn PDF document text
    • http://abwalabamaave.com/uploads/files/70356550179.pdfIn PDF document text
    • http://burragebrothers.org/demo/jolie/beta/userfiles/files/95464693617.pdfIn PDF document text
    • https://diphong.com/uploads/bazipivetepoloxojej.pdfIn PDF document text
    • https://raselapp.com/userfiles/file/58314734313.pdfIn PDF document text
    • http://tries.cz/media/images/upload/file/jinotawitupitix.pdfIn PDF document text
    • http://location-appartement-venise.com/italie_documents/files/65090362552.pdfIn PDF document text
    • https://istanajp.com/contents/files/8562958265.pdfIn PDF document text
    • http://eugensa.lt/app/webroot/uploads/userfiles/files/kividujubozerazider.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/ravunezazeliresavuwowekip.pdfIn PDF document text
    • http://smsalumni1971.com/apadmin/uploads/userfiles/files/51840030800.pdfIn PDF document text
    • http://interstyle.org/content/xuploadimages/file/palonederugidatosaboluli.pdfIn PDF document text
    • http://satyavnetworks.com/fck_upload_images/file/fijufa.pdfIn PDF document text
    • http://lasfyy.com/uploadfile/file/20210905095836288.pdfIn PDF document text
    • http://jinanxintiandi.com/userfiles/files/wagesebiwuguv.pdfIn PDF document text
    • http://year-c.com/upload_fck/file/2021-9-12/20210912165827640652.pdfIn PDF document text
    • http://oris-am.com/editor_up/voxanof.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/ieu7bu898d1r6sl6jtngltuaj1/verivexap.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_off0000e1ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1CE 11028 bytes
SHA-256: bc4f45a6d87267ba691c8f903b81cc8c210cbd3d583ac63906f67a3e94eba4eb
font_01_sfnt_off0000fb4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB4D 18616 bytes
SHA-256: ebcdf876e34abf22a83ee9612bc5a355f6fb5f43fc75ac3d9d00cfa749e7725d
font_02_sfnt_off00012afb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1