Malicious PDF — malware analysis report

Static analysis result for SHA-256 6344565827164184…

MALICIOUS

PDF

89.6 KB Created: 2021-07-02 00:58:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 3cbfc4860f350293524625995fa40741 SHA-1: dc31ccf815e078300aa09557622e071876d72c2e SHA-256: 6344565827164184a16991f5745b44d410af1780ee82a40c08ceb177f3af1f49
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to various websites, many of which appear to be compromised or disposable hosting, suggesting a link farm or phishing lure. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and link farm behavior are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://myvideoclasses.com/ci/userfiles/files/90989022545.pdf In PDF document text
    • http://sammyuriasproperties.com/userfiles/files/26377120872.pdfIn PDF document text
    • https://earthideasawnings.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d5bfa2470eb---xigamipiliv.pdfIn PDF document text
    • http://moveworldtogether.com/datas/files/98171528927.pdfIn PDF document text
    • https://argentinaproduct.com/ckfinder/userfiles/files/rabevupudisiwulud.pdfIn PDF document text
    • http://seoulmenu.com/uploads/files/17137467963.pdfIn PDF document text
    • http://bajajsports.com/userfiles/file/18526450609.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/pq72omps1992v4njibp15s2265/36518055893.pdfIn PDF document text
    • https://frontiersneurophotonics.org/wp-content/plugins/formcraft/file-upload/server/content/files/1/160bc7aa412b75---wukejobirilugetitufug.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/596d8ec89bda00738dc43b8d913033bc/letemosidenefevat.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa67569afcb---jenodotel.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606f00d80f359---52180686511.pdfIn PDF document text
    • http://xboxheerlen.nl/userfiles/file/61825787766.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/69385a370906cba793250fc92974c122/ribovoroxijo.pdfIn PDF document text
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076c8769ec60---27847945311.pdfIn PDF document text
    • http://abwmountvernon.com/uploads/files/sokumizerut.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/xilopezogopobutuzimuji.pdfIn PDF document text
    • http://metaglas.kr/userData/board/file/61592750211.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a97565c159---75996714644.pdfIn PDF document text
    • https://aartipalette.com/userfiles/file/rewepajobepumeke.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/hr4p120a87rmjehf2cuush5284/46116267489.pdfIn PDF document text
    • http://steakclubhn.com/campannas/file/fetewo.pdfIn PDF document text
    • http://alarcon-v.com/editor_upload_image/file/nevosotajanivenatiwapamoj.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad930ac4057---98630124295.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/moludovin.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606fd947473e9---53134098025.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=god+fearing+man+meaningPDF 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_off0000fd4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD4A 16660 bytes
SHA-256: eed56b2d3e7a4c046350751006ec3cf124d412ddbedc618cbb578fb908d58045
font_01_sfnt_off00012824.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12824 10424 bytes
SHA-256: 3e94d156c003a1e33067fe53ead74f4166faa72b04070c8eb8b72d843b4289b4
font_02_sfnt_off00013f85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F85 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1