Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd46389448360767…

MALICIOUS

PDF

71.0 KB Created: 2021-08-27 23:06:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 5ca2d0415c6217b0aac8c0a7ff88b7b5 SHA-1: 4cfd661de8509df9feed31d5c3455fd8918dbafc SHA-256: fd46389448360767e3ec953395f8775f1eb6899a4c4d0869e2d6546e6c7961c7
156 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, many pointing to compromised WordPress upload directories or disposable hosting, suggesting it's designed to lead users to malicious sites. The presence of multiple external URIs and link farms indicates a probable phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://qianlong99.org/ckfinder/userfiles/files/kadifixawe.pdf In PDF document text
    • https://artasedanasingaraja.com/uploadfck/file/5851358053.pdfIn PDF document text
    • http://tecniagua.es/uploads/ckfinder/files/96079714921.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/f8tsk2ta5l56o8dkndri30jui7/33291723561.pdfIn PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/1609bda6bb2b00---bonivegiguxuwozat.pdfIn PDF document text
    • https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077b14f47382---felevugakojajajize.pdfIn PDF document text
    • http://conhantaoankhanh.com/webroot/img/files/pamagisoneso.pdfIn PDF document text
    • https://www.getfitcrew.com/wp-content/plugins/formcraft/file-upload/server/content/files/160804ffc2eb9c---35968942340.pdfIn PDF document text
    • http://improntediteatro.it/userfiles/files/54413183271.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160720c505df1e---xuxekosewivefokeni.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/b50d7459d71947f4747de1ff570246cc/kunugudepuwexu.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/jonosiveviwomobibani.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/e34b7990e53df58fcea94e671f76efa5/55231727264.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/tulinajakakebumeret.pdfIn PDF document text
    • http://douzonebnf.com/upload/file///lezomikidimosis.pdfIn PDF document text
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/r70s7m012nbph57hojngdi0am7/refumifizemexixofikat.pdfIn PDF document text
    • https://tennis94.fr/img/pics/files/32391774875.pdfIn PDF document text
    • https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/43290941002cce6005bf92047ef7f1da/kawepobigodesirave.pdfIn PDF document text
    • https://vmkstroi.ru/wp-content/plugins/super-forms/uploads/php/files/91d4067006ca822d9350abfee1c08338/44539396688.pdfIn PDF document text
    • http://el-master.ru/userfiles/file/65247268249.pdfIn PDF document text
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/genun.pdfIn PDF document text
    • https://comfort8889.com/upload/files/93666079431.pdfIn PDF document text
    • https://hanurichurch.org/ckfinder/userfiles/files/zafuzozexuwenobaz.pdfIn PDF document text
    • https://aaaxxion.info/images/file/pimonilaloku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=meaning+of+duperPDF 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_off0000b853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB853 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD065 15124 bytes
SHA-256: 8c521de1f515499f8906d055159ec79a41bb76e796ab24fd653f4f36ffdef1ec
font_02_sfnt_off0000f6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6B0 10456 bytes
SHA-256: e1680a6c89c338ba074f92a2e208732cc4306008bfc9b7678cbb100fb5642bd5