Malicious PDF — malware analysis report

Static analysis result for SHA-256 62709f99b2947651…

MALICIOUS

PDF

82.2 KB Created: 2021-09-07 18:58:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 1ce4ffb172339606ab2d6bc826ddabb6 SHA-1: eb2955abe716aeef769b5e1582064bd267341ec0 SHA-256: 62709f99b2947651458202a8efe42ab96fd24a86f314d61dc4a01d710ac28042
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. The presence of multiple PDF link farm heuristics further supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 6

  • 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.
  • 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://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/1608db00281194---kajatudewexegalo.pdf In PDF document text
    • https://futurefacesnyc.com/uploads/file/fulubuxe.pdfIn PDF document text
    • http://dailythang.com/userfiles/files/80750725031.pdfIn PDF document text
    • https://monographie.com/ckfinder/userfiles/files/pigalavufuwi.pdfIn PDF document text
    • http://teplolux72.ru/upload/file/kosujopowamulajog.pdfIn PDF document text
    • https://nguoixunghekiev.vn/userfiles/file/kakezaxerak.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160ec408bd7e89---39235131307.pdfIn PDF document text
    • http://topcudental.com/img/userfiles/files/xutesinipo.pdfIn PDF document text
    • http://budka39.ru/files/sejivixazekukadurotuno.pdfIn PDF document text
    • https://cowichanseniors.ca/userfiles/file/90499467553.pdfIn PDF document text
    • https://gbeequestriansurfaces.com/wp-content/plugins/super-forms/uploads/php/files/fj14ut61qk19u5abb9cvb20r25/84390234986.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16074b59e64561---fefubupebubaribogo.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/4118793827.pdfIn PDF document text
    • https://siroyensao.com/upload/files/xirerafula.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160914bb28a5bc---69874685497.pdfIn PDF document text
    • https://fcr-fomentoconsumoerenda.com/uploads/files/xodadijozivarevefelumo.pdfIn PDF document text
    • http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e60066c7f87---74180067405.pdfIn PDF document text
    • https://doanhnghiepvietnam.org/img_duhoc/files/38193380985.pdfIn PDF document text
    • https://bjjewels.net/nbloom/fckuploads/file/60082624509.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/09beeb0121643af1ceb45c2161a511f5/kipiz.pdfIn PDF document text
    • http://erimti.com/userfiles/file/55936709128.pdfIn PDF document text
    • http://artpolinakuzina.ru/pict/file/detujezila.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/15183457100.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=active+transport+7.3+worksheetPDF 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_off0000dc85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC85 10940 bytes
SHA-256: 67625f3f761ab3ca3da4853a3277740a228e0809b69f7ad9f11258dec0ba7cdf
font_01_sfnt_off0000f5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FE 17380 bytes
SHA-256: 0ec0e1221216d88bd9c0fd9f0e14f074de457d2a5bf24e9f5526c247942822cd
font_02_sfnt_off00012353.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12353 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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