Malicious PDF — malware analysis report

Static analysis result for SHA-256 919f7e7b4406d37e…

MALICIOUS

PDF

83.9 KB Created: 2021-09-01 17:57:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 28d2ea32c64e9ce52342cbf3791b89d6 SHA-1: 726b516b5019803cf91ee164d399961f15f17e98 SHA-256: 919f7e7b4406d37e8e29207cc55ace9b5b878b44425cdb00b0f1b5995b69c1fc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS upload storage or disposable hosting, suggesting an attempt to distribute phishing content or further malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://pixomot.ru/uplcv?utm_term=icse+class+9+physics+questions+and+answers PDF link annotation
    • http://pytextiles.com/userfiles/file/velurarunisudifuwetesuxu.pdfIn PDF document text
    • http://yaeram.com/userData/board/file/24445624471.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608df8b2e2d7e---tumabujobemitimato.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/suzap.pdfIn PDF document text
    • https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/8kiqfgcod6i970jb644ajb7e3o/86008505110.pdfIn PDF document text
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608e93b28fea7---55738649054.pdfIn PDF document text
    • http://ekbdrive.ru/ckfinder/userfiles/files/nutupumit.pdfIn PDF document text
    • http://apexnepaltravel.com/userfiles/file/15033593759.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/md56k94agbr562pjtcqaublc50/57451889893.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce18497ef1---zunuvedebenajul.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/581c0cf2727b9d3e0e15a6eadd0ab656/21622849086.pdfIn PDF document text
    • https://sankaibearing.com/userfiles/files/wipokipusumujifusobajaja.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1609849beb9632---5916142821.pdfIn PDF document text
    • https://ptogel2.com/contents//files/dipisovog.pdfIn PDF document text
    • http://etre-belle.su/images/file/15761068037.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609c02af9cc8d---99325194702.pdfIn PDF document text
    • https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160d8cb9fdb3f3---31452751718.pdfIn PDF document text
    • http://yasaitogo.com/uploads/files/49252495081.pdfIn PDF document text
    • https://esperanzadeavila.com/fotos/file/98516828651.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c6d1702ea97---nemufurixuge.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/20218181627145284.pdfIn PDF document text
    • https://eobliecky.sk/userfiles/file/podezetixemuwamazebemewok.pdfIn PDF document text
    • https://newline-eg.com/userfiles/file/bawefufosivino.pdfIn PDF document text
    • http://nhakhoasaigonkimcuong.com/uploads/images/files/riveserelirir.pdfIn PDF document text
    • http://coffee33.ru/archive/file/92244382835.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_off0000df3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF3C 11176 bytes
SHA-256: 10d0510c155a49c7cbb5d09c97f5d2b49e93fcf0c540c47a6f97bdd2a50d74b6
font_01_sfnt_off0000f93c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF93C 18256 bytes
SHA-256: 4e462eb3fd89c3aa9a489811d3e170159451d2e0a7082ba9ecaeb8d5ae9d093b
font_02_sfnt_off000128f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128F0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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