Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a2d75b35513d396…

MALICIOUS

PDF

125.4 KB Created: 2021-06-24 03:26:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: fed4615c0855b0bae44249feb320a944 SHA-1: e5132499d53acbfbbeeb524b680b49d740e6c757 SHA-256: 1a2d75b35513d396f8e69129dbea56b272187ebdcec728ac2a3bfd272587e8d9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links to external resources, many hosted on compromised websites or disposable domains, suggesting a link farm designed to distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs and link farm structure point towards an attempt to trick users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://parklanehotel.asia/userfiles/file/lexijisalewesutuxujudaxa.pdf In PDF document text
    • https://leganordavigliana.it/uploads/file/vaber.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/a4la23hpc7q1ua0iplpab759n4/xusegexafigof.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160841f514bea7---donuponunasupekebinem.pdfIn PDF document text
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/ejcrvpfagh7etqd81fdr01u11n/sopumalaxowugujuzetoso.pdfIn PDF document text
    • https://invest.pl/userfiles/file/tegibeje.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16074d01a9d064---navatavuvupejisizor.pdfIn PDF document text
    • https://whatproperty.ng/ckfinder/userfiles/files/99755024843.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608c56db7e3db---tijebigebegaganijemakalov.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/4e2e2c713c9b72bb621d53b8a384b4d6/tokikitiroxinuwu.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a05c3bc6fd8---42887052375.pdfIn PDF document text
    • https://funkydrop.shop/wp-content/plugins/super-forms/uploads/php/files/a5badddd246f332e69e6ce8f6bbd4c99/59598993802.pdfIn PDF document text
    • https://baohohoanglong.com/userfiles/file/webis.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160961f1063ad9---48223199316.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/lafonajizogu.pdfIn PDF document text
    • http://cayxaotamphan.net/userfiles/image/file/71712042718.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/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=chacha+chaudhary+aur+raka+series+free+downloadPDF 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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018441.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18441 4092 bytes
SHA-256: 12466a3c9f0cf4e2db975b7ea054e72533b5af91d7996b0a62901afb9917816b
font_01_sfnt_off000192de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x192DE 5272 bytes
SHA-256: 047fcd42df68206d4f0e2f7b09061b90cc8991e16ada7879e84bdf68f9a157af
font_02_sfnt_off0001a4d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4D8 13872 bytes
SHA-256: 7624edbf825336633d4e664da0742cf2f216fdb85b75c24adc27ea76fa30df6c
font_03_sfnt_off0001d22b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D22B 16164 bytes
SHA-256: ebd2804bff382343e08f6a42dc45f69f4e794c08b23908ae60ba78ededae74b1

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