Malicious PDF — malware analysis report

Static analysis result for SHA-256 4438d8f9075b7ff7…

MALICIOUS

PDF

149.3 KB Created: 2021-06-20 08:48:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 59f880ccfda8116a8daebbed28e4199c SHA-1: 8bbc1f1cb0a2c3c3639f90b52df8318e58405780 SHA-256: 4438d8f9075b7ff7c7ba4db6988118e73c7ae74c26404ee5fca91fb642da654e
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further payloads or conducting phishing operations. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 http://marinapogon.pl/upload/file/buvizes.pdf In PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/sab7ropkktt6n2f6aaktpbgsq5/13904714604.pdfIn PDF document text
    • http://agendatourvietnam.com/hinhanh/file/32700205065.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608724032e903---pobegimoxalujamogax.pdfIn PDF document text
    • http://grandinhr.eu/images/user/file/pewogakekoze.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/zisodivido.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/mf6564s0fc6284oqqmfl813bg5/91573373674.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/8otm7f9c5h81ss7ja8ohn66og5/93979204594.pdfIn PDF document text
    • https://www.audioclinica.pt/wp-content/plugins/super-forms/uploads/php/files/in81fadsm3iqgfa4390vhjr89f/7676391975.pdfIn PDF document text
    • https://secolink.sk/userfiles/file/22371672214.pdfIn PDF document text
    • http://agcslohian.com/userfiles/file/venitufafukinazipoti.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bed9526beec---89900973358.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adcaf1645c9---26840993956.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca9fa12fc7---94151703942.pdfIn PDF document text
    • http://arniestribu.com/campannas/file/nisonupisonage.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=keeping+up+with+the+kardashians+season+7+yearPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00020bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20BDC 5496 bytes
SHA-256: 031cdc8070a7506f2dd2afdb1405dac6762ec0d02ed7f32efb901b389306372f
font_01_sfnt_off00021eab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21EAB 11708 bytes
SHA-256: 197845a44d98615a87ceb5db2ea644cc963f98582099efdb87a858098a2ac048

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