Malicious PDF — malware analysis report

Static analysis result for SHA-256 470afae38eef02ef…

MALICIOUS

PDF

77.0 KB Created: 2021-05-22 16:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 5a7f9d3f907634cc58e4135b9ab3f416 SHA-1: bd64578d73407838fb87eac9e5eca87edc86d7e5 SHA-256: 470afae38eef02ef0800e9f4d315cb10c279a6a6d5b1eb100895d316ad343c08
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098d49a730df---60625075251.pdf In PDF document text
    • https://seataclighting.com/wp-content/plugins/super-forms/uploads/php/files/2cfd2a3f66f62a4525052d1f0cfd9ffb/72018241698.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/8b0dc9eb4d5d571b18764341352e4089/tojijimena.pdfIn PDF document text
    • https://teenvolunteer.org/wp-content/plugins/super-forms/uploads/php/files/2a56be50f59c5a101b22653b49a1d66f/moretunoxudururawumitilal.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078c6e47f513---roxavomiwexipekis.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609a106a31e57---64666484701.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/f5a74d070461f2fee684750aa331124e/70348475934.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609a93f421dfb---11317832585.pdfIn PDF document text
    • https://www.stjohnhomelessshelter.org/wp-content/plugins/super-forms/uploads/php/files/32225648a58da8e204d9d869775b0bc4/fifet.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c4f087381---lusexanutafulovox.pdfIn PDF document text
    • https://cosalesrep.com/wp-content/plugins/super-forms/uploads/php/files/48bc752786b513e210d7304dcde7d1f1/50409459607.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/3sft4c1sr4lie6jviqccq4qtm2/pawupasateziz.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/xagopipaputofesizixogivi.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/92074977865.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4213abfb53---80464301192.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=download+video+lucu+jowo+status+waPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF83 6104 bytes
SHA-256: ab4e9a89fbbcbde6587d11b22423d43d4d568ecb680d612b6486a5408ad08e15
font_01_sfnt_off0000f36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36F 5064 bytes
SHA-256: 733f8162fca78f901d2dcfe320aa78e24701181d01943cccb8bbd93e4c06f1e5
font_02_sfnt_off000104de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DE 9824 bytes
SHA-256: cd17e9b71238fff60b575d04908311abb18e99eb4cf22c900edbfe57e230a586