Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f1f0f1518c32a23…

MALICIOUS

PDF

81.1 KB Created: 2021-08-26 18:54:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 2d212624caa229b96dcbd37af221a5c8 SHA-1: 3d5c7e62ce83e8a16d2654c862cf1f6af8172b34 SHA-256: 0f1f0f1518c32a231700d75ca1bb37b311a04076f27db0b37ea2b48eef5a3d52
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating a link farm designed to host malicious content or facilitate phishing. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as a phishing trojan. The presence of multiple links on potentially compromised CMS uploads reinforces the attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/23c8f90baae2ffbed4a6096950eed9f7/pirisekimimulo.pdf In PDF document text
    • http://4x4autok.hu/userfiles/files/5722484468.pdfIn PDF document text
    • http://divapharma.com/uploaded/file/68582993187.pdfIn PDF document text
    • https://cortemadera.com/wysiwygfiles/file/22930768332.pdfIn PDF document text
    • http://www.srijonihealinghome.com/fckimages/file/61558456154.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/95594890846.pdfIn PDF document text
    • http://jedwines.com/cmsCart//upload/file/womolamom.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c42661de5ab---xeraxe.pdfIn PDF document text
    • http://hoitruyengiaocodocvietnam.com/uploads/image/files/nipolilozexofafe.pdfIn PDF document text
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160960089210f8---tukasubifex.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608594746cafd---68426042140.pdfIn PDF document text
    • http://dmscsmartlifeblog.com/userfiles/files/83332279471.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/zeraxo.pdfIn PDF document text
    • https://www.wflorlando.com/wp-content/plugins/super-forms/uploads/php/files/c2bfe6fa2ae99852c2865e0bf6596256/39517260844.pdfIn PDF document text
    • http://charivne.info/images/file/59563422577.pdfIn PDF document text
    • http://namuvaldymas.lt/userfiles/file/75794233110.pdfIn PDF document text
    • http://vijyaiprismcrm.com/userfiles/files/lopopijagabit.pdfIn PDF document text
    • http://chuaphucluong.com/uploads/image/files/tozukuzafupaxixip.pdfIn PDF document text
    • http://classicalgardenfountains.com/uplds/file/laforizelavevax.pdfIn PDF document text
    • http://hongphuc.vn/userfiles/file/53910399344.pdfIn PDF document text
    • http://emeat.ru/var/files/72172481033.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16072cbf576120---36892120667.pdfIn PDF document text
    • http://chocoenglish.com/_UploadFile/Images/file/31527471827.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=acknowledgement+for+english+projectPDF 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_off0000dcd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCD4 15584 bytes
SHA-256: 57bec00716ab594e06fee918ba3fad41f9287283fbf38ce38cd06745e0b91a8f
font_01_sfnt_off000104b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104B8 11192 bytes
SHA-256: 3d719342496c34baa47e8a5695fa8b7c20a44d17d83c0b33be42724f14aef16c
font_02_sfnt_off00011e86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E86 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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