Malicious PDF — malware analysis report

Static analysis result for SHA-256 8923d09dd675aeb4…

MALICIOUS

PDF

69.3 KB Created: 2021-05-27 12:41:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 3256f2f8c7609b30af991ad73d885f28 SHA-1: cb5daf13990cd85b857a4f16b3d46950a485f5fd SHA-256: 8923d09dd675aeb4648c4aec877d4602bae71b04a6b7b4622f923c2209a53348
196 Risk Score

Malware Insights

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

This PDF document contains numerous links to external websites, many of which are hosted on compromised WordPress installations. The document's content, disguised as spiritual discernment information, is a lure to direct users to these malicious sites. The presence of multiple PDF_RANDOM_URL_LINK and PDF_SEO_DISPOSABLE_LINK_FARM heuristics indicates a strong intent to distribute malicious content or redirect users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9693

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://archism.ru/uplcv?utm_term=what+is+true+spiritual+discernment PDF link annotation
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607371e8b951e---60546403315.pdfIn PDF document text
    • https://hafa-verein.de/wp-content/plugins/super-forms/uploads/php/files/f5147f7013f6fdd838759b1be433dc26/1081260225.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/4h6nlvnj4bnel02sd6tn5i5b00/nelujabosipix.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/36792067595.pdfIn PDF document text
    • https://atolab.it/wp-content/plugins/super-forms/uploads/php/files/d40969421124eb2782572311628d1389/52852499762.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16073ed06e506d---82984111265.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/16076f638f008c---73180700966.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082b35c4695a---70623039020.pdfIn PDF document text
    • https://www.democratum.com/wp-content/plugins/super-forms/uploads/php/files/20127bebecacf5c06d10e05da1c0210a/xinamu.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/901d125aed5ffa3b6ddd9f17543e0585/34840137971.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/e5751139c14e9bcba7f080dd0a713b24/nowiz.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16081a63d65b2e---26739351271.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9c4f226bc---33028036080.pdfIn PDF document text
    • http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1dafef350---wubumutidawuwalo.pdfIn PDF document text
    • http://riskhedgetech.com/uploaded/file/127121498060a46ea7824b4.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/3t3rj466f68of2uh96gdhst180/33945672150.pdfIn PDF document text
    • https://www.bakirkoytemsilcisi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b6252bef20---34908920566.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000df78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF78 5324 bytes
SHA-256: 365ae94ae9f21d722655a1c352cd7185c895c6128954a9541e78f34cc0456a86
font_01_sfnt_off0000f173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF173 10472 bytes
SHA-256: 62e315b0dd10751b250dae5036b423f7df3dd6968a185b85ee83c107d1a7e041