Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced4ac9b5c8ef166…

MALICIOUS

PDF

68.6 KB Created: 2021-09-02 20:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 22e435c7845ce5e5e941236aee61d289 SHA-1: 8cd75929689cb4ef08bbf9922ccc8f24ee5f568a SHA-256: ced4ac9b5c8ef166634a5ea400de2ae71dc07be8f8d30466e141c84ff17f13ff
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. The document is image-based and contains numerous links pointing to potentially compromised websites, suggesting an attempt to redirect users to malicious content or download further malware. No scripts were extracted, but the structure and URL patterns are consistent with phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608830f6eb29e---fofakomexu.pdf In PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/19p0pgfh5sg7p6fsub9ds3r8to/66755223998.pdfIn PDF document text
    • https://takarasushimn.com/userfiles/files/22118901508.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611ce1f24a269---94482795786.pdfIn PDF document text
    • http://gniortho.com/files/Upload/file/71551715592.pdfIn PDF document text
    • http://xn--9p4b29dncp2cc6y.net/upload/fckeditor/file/45810665825.pdfIn PDF document text
    • http://deaprogettazioni.it/userfiles/files/47794173045.pdfIn PDF document text
    • http://project-st.ru/userfiles/file/96464068298.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/69500100480.pdfIn PDF document text
    • http://timesofbangla.com/uploads/files/54052733646.pdfIn PDF document text
    • https://go2germany.ru/files/file/mefumofekizidajurubogeme.pdfIn PDF document text
    • https://wineart.online/userfiles/file/fusejobupadazemepada.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160884860428de---65121040069.pdfIn PDF document text
    • http://sity-luxe.ru/userfiles/file/zipaxolekesomeputepoj.pdfIn PDF document text
    • https://acronimocostanzo.com/userfiles/file/puladojosuzuwizodexani.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4c3aeffbb---mutilemigel.pdfIn PDF document text
    • http://www.temaricerca.com/entry2013new/admindia/ckfinder/userfiles/files/jeguzudapune.pdfIn PDF document text
    • http://ikhmongol.mn/ckfinder/userfiles/files/15125012452.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095cf567b6ed---20777153728.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff66669599---20718524591.pdfIn PDF document text
    • http://kaiyudachem.com/filespath/files/20210809135541.pdfIn PDF document text
    • https://marathonblainville.com/userfiles/files/70071418663.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f5b0717fd6---kiferotuguzogejararon.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b876ba91878---vowewububoragila.pdfIn PDF document text
    • http://king-tableware.com/uploads/files/202108290856271506.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=ocip+insurance+manualPDF 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_off0000b1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB1AA 10444 bytes
SHA-256: 8f9f732bf44bf92969ef64333acc06e29a7eeeb884624fe0c031bddac2d78d9e
font_01_sfnt_off0000c95c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e16e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE16E 13872 bytes
SHA-256: 4d11d42e10f5fc3fbedbc25c683754e12cecbf823b9e6a26446ce2457f0e9a71