Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ade3b5bd4161be4…

MALICIOUS

PDF

73.3 KB Created: 2021-06-19 05:17:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c0f3a248c4c38375158439ab4860cf98 SHA-1: 2e8f03e36e439db96377fa972d4bb3c62648e45e SHA-256: 9ade3b5bd4161be40e031c1653c078125a2b4bbd24133c1dafd137585e2a4316
164 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, suggesting a link farm designed to distribute malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attack pattern involving luring users to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=rehmat+baras+rahi+hai+mp3+free+download PDF link annotation
    • https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/49db9af24bf9ed1d0448cf223e76a597/23623882245.pdfIn PDF document text
    • https://ayurvedaemart.com/uploads/file/94311701673.pdfIn PDF document text
    • http://champagne-marc-chauvet.com/images/files/wufipirexit.pdfIn PDF document text
    • http://magogaralbamoble.com/galeria/files/58347290205.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078ab73e49e6---bogoradobemapopu.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/kegexoxe.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/27438155160.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/q4jdr5ouqif13apgrdvr8plpnm/54644577324.pdfIn PDF document text
    • https://smilepath.com.au/wp-content/plugins/super-forms/uploads/php/files/37c2fe5d9eb339320a369e013989a14b/voxuxigijatebiw.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1607787bc10eec---serijovifasumozufof.pdfIn PDF document text
    • https://study-abroad-travel.com/ckfinder/userfiles/file/16030500932.pdfIn PDF document text
    • http://robertfeinberglaw.com/images/edit_images/file/gifitugowimajeze.pdfIn PDF document text
    • http://snotlicker.com/clients/10243/File/ladoditifozisa.pdfIn PDF document text
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/e35df06a5cd5914c7844c2216bcbcf11/bunugaxitoz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn 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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c32c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC32C 5684 bytes
SHA-256: b85edc93d4cfd8937efde3543e142780500c86436e680b402529b0dd323d409f
font_01_sfnt_off0000d65c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD65C 10248 bytes
SHA-256: 6056d2848df46dece6cfc2c1c7a0b9b076a720046e4ae91a04b3c929d08d1681
font_02_sfnt_off0000f97b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97B 9512 bytes
SHA-256: ef8fa7804c93519090890c407d1b269e397b5b6a0a7145c17844dcb69426907a