Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0ca9cbdfc43c784…

MALICIOUS

PDF

79.8 KB Created: 2021-09-15 16:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 21cd5c8878916112201c2edc0a2e5813 SHA-1: 02393592d6be985b9768b02f9b25a1e3f922a0f6 SHA-256: f0ca9cbdfc43c7846d34aa7542a7fd55b1b5514af2853d98dd062dfb4601e75e
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. The document body is unreadable, but heuristics indicate it functions as a link farm and a callback phishing lure, directing users to potentially compromised websites. While no scripts were explicitly extracted, the PDF format can embed JavaScript, which is often used for malicious redirection or exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://mywayrtk.com/userfiles/file/tixudanixurip.pdf In PDF document text
    • http://ibarugi.com/fckeditor/userfiles/file/63257214283.pdfIn PDF document text
    • http://gibisch.org/files/files/dodedulijipawejoxil.pdfIn PDF document text
    • http://delve-cr.com/uploads/benefufumofira.pdfIn PDF document text
    • http://bergfin.se/wp-content/plugins/formcraft/file-upload/server/content/files/16136bfa90dc5f---duvowip.pdfIn PDF document text
    • https://certifiedmoversinc.com/wp-content/plugins/super-forms/uploads/php/files/f9575c86e3642345ca4506301fffa676/boduzefutuguxo.pdfIn PDF document text
    • http://stisk.com/file/14750966970.pdfIn PDF document text
    • http://www.39koratmachinery.com/file_upload/files/39588194541.pdfIn PDF document text
    • http://lemonsport.hu/upload/file/nigagetavamelu.pdfIn PDF document text
    • https://myarchitect.es/ckfinder/userfiles/files/14477932274.pdfIn PDF document text
    • https://www.syria-report.com/sites/all/libraries/ckfinder/userfiles/files/80199607433.pdfIn PDF document text
    • http://my-hustle.net/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/57724431400.pdfIn PDF document text
    • http://zzfcw.com/file/fkimg/file/dudakipun.pdfIn PDF document text
    • http://yas-center.ru/userfiles/file/niwaze.pdfIn PDF document text
    • https://invest.pl/userfiles/file/91684489041.pdfIn PDF document text
    • http://geredekombiservisi.com/userfiles/file/jazeg.pdfIn PDF document text
    • https://zoorichi.com/temp/fckeditor/file/81489314397.pdfIn PDF document text
    • http://kozszemle.hu/uploads/files/gojufezip.pdfIn PDF document text
    • http://hantechwelding.com/userfiles/file/2021090608350873499.pdfIn PDF document text
    • http://fiumaradelsossio.it/userfiles/files/kilemejesiligevifilak.pdfIn PDF document text
    • http://teamhead.net/userfiles/file/wawiluvuruzez.pdfIn PDF document text
    • http://gapp.fr/medias/files/57133173773.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/161376f3d452ec---76490311411.pdfIn PDF document text
    • http://0225674989.kad.tw/kads/ckfinder/userfiles/files/sitofedilejazanapi.pdfIn PDF document text
    • https://tpijobportal.com/ckeditor/ckfinder/userfiles/files/71134782800.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=voice+pro+apk+crackedPDF 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_off0000d676.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD676 17120 bytes
SHA-256: 7bc65ccebdbb3ac82d674b71d8f09ced57f45b55ae5b1b6b95d09397320672ce
font_01_sfnt_off0001028e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1028E 10152 bytes
SHA-256: 1dfd681b1f1423464cc7264e320683bc3bb34480d30dbaa54e223f28c0f2a810
font_02_sfnt_off00011958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11958 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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