Malicious PDF — malware analysis report

Static analysis result for SHA-256 e26254a46221e218…

MALICIOUS

PDF

81.0 KB Created: 2021-09-16 08:11:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 4a14d54d6a8165812f8d5077b9eaa8bf SHA-1: 062790ed4ceba9b2e1409ea08c472da5a9019396 SHA-256: e26254a46221e2183a1e8546e7f5b2bb5b979d813648f53379ce5e5a7abd09f8
164 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links to external websites, some of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or redirection mechanism. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=dosti+friends+forever+full+movie+download PDF link annotation
    • http://hightopeducation.com/cms_uploaded/file/fobotejevawagofasu.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/67495662084.pdfIn PDF document text
    • http://nanumed.ro/uploads/files/bubudazujizipidudafoza.pdfIn PDF document text
    • http://jevades.com/aircraft/fckimages/file/41151978567.pdfIn PDF document text
    • http://xn--90aoa5aj.xn--p1ai/ckfinder/userfiles/files/xemivusojinugisemixefuji.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/panomejegizijaxikoferod.pdfIn PDF document text
    • https://ip-pharma.net/data/files/92416504535.pdfIn PDF document text
    • https://hoalavender.net/upload/files/jomaw.pdfIn PDF document text
    • https://securitydm.rs/slicice/file/dozeminix.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/ihfbvdn7irn3b30hdcddnfdtp0/puzibotifufiguru.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/16410ab1911afbce00f077aa804bb65d/vanepapexajawu.pdfIn PDF document text
    • http://mobitransjogja.com/files/22676497007.pdfIn PDF document text
    • https://geelaboba.dswip.com/ci/userfiles/files/33217560981.pdfIn PDF document text
    • https://yk-tech.com.tw/ckfinder/uploads/ckfiles/files/91597080825.pdfIn PDF document text
    • https://snf.styleguides.ch/userfiles/files/rokevoliziwepomafo.pdfIn PDF document text
    • http://tweddlefoto.com/files_contenidos/upload/files/podurugitup.pdfIn PDF document text
    • http://sial.pl/galeria/file/givoxumop.pdfIn PDF document text
    • http://boston.pl/fck_pliki/file/34465558470.pdfIn PDF document text
    • https://wedding-photos.cz/userfiles/file/26112179415.pdfIn PDF document text
    • http://foxgraphics.paulsfashion.in/files/tojumagivutaponikepevuz.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/7ad39fbfe1cf2c93b463c2c662df86ff/72947065357.pdfIn PDF document text
    • http://zvaracskaskola.eu/editor_uploads/system/files/tawofaxezubiwidejupo.pdfIn PDF document text
    • https://www.adoz.cz/ckfinder/userfiles/files/fudumawo.pdfIn PDF document text
    • https://mariapolis.net/ckfinder/userfiles/files/51748689088.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_off0000d940.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD940 17140 bytes
SHA-256: cb75cbe3fa7e7630c70b24ff3c8ec39832720c79a70d1eda785c916c5fc5b2a6
font_01_sfnt_off0001059b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1059B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011db2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DB2 10768 bytes
SHA-256: 0ed8e25ed9c2babb056e7caab99ff6bea34cf45eac983f1aa81b61ed24b7724a