Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ec19a070f40827…

MALICIOUS

PDF

84.2 KB Created: 2021-09-07 08:13:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: f3b4b683893f2418a1e5f08439897463 SHA-1: bcb529cd3c98822d589bc6c6bbe9198c4d9073fd SHA-256: f7ec19a070f408271f62cac46bdcbb2a54f88f9e9e3e1a45000d32820f543d08
156 Risk Score

Malware Insights

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

The file was detected by ClamAV as 'Pdf.Phishing.Trojan' and flagged by an ML classifier. It contains numerous links pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users. The presence of these links indicates an attempt to lead users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://bippex.com/filespath/files/20210819074408.pdf In PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/e672b6afbf52fd2085b822c3eeae243e/78630927915.pdfIn PDF document text
    • http://woods-china.cn/ci2/userfiles/files/20210811085921.pdfIn PDF document text
    • http://agriturismolionsfarm.it/userfiles/files/miturerufuzebis.pdfIn PDF document text
    • http://virus-safe-zone.com/ckupload/files/lovonizarifazima.pdfIn PDF document text
    • http://phuwangnam.com/user_file/file/43643289208.pdfIn PDF document text
    • https://angkagenap.com/contents/files/wenamexivuwotulafad.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a7d8d94c36a---sipisozexaxejejukaw.pdfIn PDF document text
    • http://wingmanplanningdemo.com/userfiles/files/wulojis.pdfIn PDF document text
    • https://peterdegendt.be/file/37476471291.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/doputijeximurovobolepu.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/zakuvuralose.pdfIn PDF document text
    • https://swimproject.eu/wp-content/plugins/super-forms/uploads/php/files/b4912ee7a61c52fb69faeac660419b33/47962684950.pdfIn PDF document text
    • https://cursosgratuitosonline.es/wp-content/plugins/super-forms/uploads/php/files/u8c3q3grm3asu2n2skbmlharev/82939928179.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/dosel.pdfIn PDF document text
    • https://tectrongim.com/uploads/files/ketav.pdfIn PDF document text
    • http://smithmurdock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074d63f7a8c1---20831827943.pdfIn PDF document text
    • http://fructusartis.com/i/File/nefoz.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160910146eaccb---kuraxavidelufamanon.pdfIn PDF document text
    • http://labonscafe.com/userfiles/xekilazuwo.pdfIn PDF document text
    • https://canadianrelocation.net/wp-content/plugins/formcraft/file-upload/server/content/files/16084a3e39eeb3---xuvidugizixix.pdfIn PDF document text
    • http://chokmanee.com/userfiles/file/90643163560.pdfIn PDF document text
    • http://redigonda.it/userfiles/files/vezuxesesabalim.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/c9f05238cfba61495e1450626aeab2a4/peximeruxiwimitik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=dolor+paroxistico+pdfPDF 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_off0000e408.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE408 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fc1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC1A 18428 bytes
SHA-256: 37c991bec5fcf04e2fda40c79384cdd33670c7b445c2efc293ddc55d59ed2a45
font_02_sfnt_off00012be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BE8 10480 bytes
SHA-256: 81187aed1d38f43a6c4c29659d69ddeeaf645774b13696e12b185a7fe9ca699f

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