Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3f2325a7aa0aacb…

MALICIOUS

PDF

80.0 KB Created: 2021-06-05 13:04:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 32948bbc0e7a42e2c1c6cd85d91996e1 SHA-1: c05e3ed5175c69c260c44c274507abd832a0d70a SHA-256: c3f2325a7aa0aacbd08c768cffdb20ea0e43bf12f0a75e4b2aeb83d5ea3c9bac
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, indicating a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly suggest this PDF is malicious, likely serving as a phishing lure or a distribution point for further malware. No scripts were extracted, but the presence of external links and the overall structure point towards a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://chcial.ru/uplcv?utm_term=is+relion+premier+compact+accurate PDF link annotation
    • https://ercrs.org/wp-content/plugins/super-forms/uploads/php/files/32squsiu7erda42jd57qbhhom4/rowukiwe.pdfIn PDF document text
    • https://www.escon.it/wp-content/plugins/super-forms/uploads/php/files/3b0862ac4fea99f5b9a7a6bb07d04588/lavinonesiwemijaja.pdfIn PDF document text
    • http://apvn.info/userfiles/file/tanudosidopixuzumuwokofum.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b637d14f37a---60517428610.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16070d612d3d25---pogubakopijawutomakim.pdfIn PDF document text
    • https://olgapopovaphoto.com/wp-content/plugins/super-forms/uploads/php/files/5935d64f83603dda8fd602cb443c262e/68440414432.pdfIn PDF document text
    • http://gtshotel.it/images/file/16867660884.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16078af57ec181---pumitunanavivuvunumalu.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ac1fae5f980---16490595844.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbc37c8d90---ronorufamonaluxevedetu.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/2db60420a2bbb9e62605e0670ce05a27/fufikizonisebupap.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/26573632880.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077d9a63f7f1---58108060150.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/2f9587576886b455c989cb8de72307ba/66244497713.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a0535e2a35a---rodovebopenuraxufuzom.pdfIn PDF document text
    • https://plasy.com/uploads/file/liligozewi.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB7C 4900 bytes
SHA-256: 5ba32efeda78bf5065897e9024de229f818234b42dca85a8bc1fc28d69ed2d1f
font_01_sfnt_off0000ebf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF5 10100 bytes
SHA-256: 6a4f1e98fa3e8839a62a10302e764da4e9508ad30ed79deb6b7fe6efa7a4ea5f
font_02_sfnt_off00010eae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAE 16312 bytes
SHA-256: aad9bc0f36eadc3314e08670b59090120051e308b357201f134af3d0b781b2b0
font_03_sfnt_off0001243a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1243A 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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