Malicious PDF — malware analysis report

Static analysis result for SHA-256 64fa9720dc311fdc…

MALICIOUS

PDF

141.6 KB Created: 2021-09-04 12:55:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 7df08da357df42f6eedde80ce3ba2ba2 SHA-1: b369b4e4cf5acb66d41a2b4cfbfbc4e786864a77 SHA-256: 64fa9720dc311fdcf5c076e92514868ff08ef3c13c8b3c9dd5f133d4e1a9aaf2
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, indicating a phishing or malware distribution attempt. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports this assessment. The embedded JavaScript likely facilitates the redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3311

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://irlanc.ru/uplcv?utm_term=lire+le+journal+el+watan+pdf PDF link annotation
    • http://vpecargo.com/userfiles/file/mituxipipomem.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6a461b537---jedofumuzibipisexijugafoj.pdfIn PDF document text
    • http://papierplus.pl/userfiles/file/5220071004.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1612fc692bc1e3---kopemutubusarulonirepuni.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/33067653805.pdfIn PDF document text
    • http://mtreurope.com/ckfinder/userfiles/files/kagidenetun.pdfIn PDF document text
    • https://www.helpagesl.org/wp-content/plugins/formcraft/file-upload/server/content/files/16088271e82336---tanavosutazubapidaxis.pdfIn PDF document text
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/16132a5d13d396---jomakizisu.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/2195721817.pdfIn PDF document text
    • http://occahomesearch.com/userfiles/files/56982154144.pdfIn PDF document text
    • http://ytbozhuo.com/upload/file/051426529076.pdfIn PDF document text
    • https://dbjadow.pl/attachments/file/kagomevekegopibulobu.pdfIn PDF document text
    • http://hieuchuan.com/upload/files/katelapokikedis.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/21813316008.pdfIn PDF document text
    • http://aptwash.com/userData/ebizro_board/file/19071983984.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/2pvg987cp7pvmt7isgs0grpknk/13545692467.pdfIn PDF document text
    • http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/488c987056f8aab48c886f7983c7070b/fiwidu.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/160870eeb1c6b4---80333623716.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094936285726---lenatumenizawus.pdfIn PDF document text
    • https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/6aee7d453da5da10ff52628e62e6a6da/52468472351.pdfIn PDF document text
    • https://activepymes.com/pub/file/bawuri.pdfIn PDF document text
    • http://pazzo.jp/js/upload/files/fazumedazuxo.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098857bc7c05---jazulamigitumis.pdfIn PDF document text
    • http://privateeducation.sg/verzsape/demo/upload/admin/files/fefarevomizelerubaxeto.pdfIn PDF document text
    • https://www.hdontheroadnapoli.it/wp-content/plugins/formcraft/file-upload/server/content/files/16093ca891339b---rumugakepusosemeje.pdfIn PDF document text
    • http://kibbkw.com/uploads/file/65350473935.pdfIn PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/23760522d73c6abc2612df6b96f25c2b/40539031148.pdfIn 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_off0001cff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CFF3 20448 bytes
SHA-256: 9f4ee49f709dd9b32e16b0dbbd945813e964579346bd3eef2ea6254148922a7f
font_01_sfnt_off000205ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x205BA 10596 bytes
SHA-256: f2aab97dca37f47c09338b7a51d9f2b45c04fcdcd09cd16828fa13eff89664e6
font_02_sfnt_off00021e09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21E09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1