Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d66c4c79d720bd4…

MALICIOUS

PDF

97.5 KB Created: 2021-06-17 11:07:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: ac83e02a3aba922d81c223202df3215f SHA-1: 58c239d3c98758eb825a8fcb3f262d2648576568 SHA-256: 4d66c4c79d720bd4180468b801b0492bb6f2724685ef88ea57ab31751f310da0
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://crysiq.ru/uplcv?utm_term=nostradamus+predictions+book+in+tamil+2020 PDF link annotation
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/ep6soq2r997p5mim6muus4r1v7/71184593880.pdfIn PDF document text
    • http://1960ihs.com/clients/e/e0/e0b58928a48036c9af8d6cfc9cffdd99/File/xokoxipun.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/897cf6fadde2d65992d48e6af6e3ca53/57625013822.pdfIn PDF document text
    • http://esoftland.com/userfiles/file/73623701663.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607af8623fa3f---28904176956.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b95dcbed4e844c5ea41701a2f7dc0be8/46359443162.pdfIn PDF document text
    • http://modnyi-buket.ru/uploads/files/44616344311.pdfIn PDF document text
    • https://qamarapps.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608611416b540---18120227274.pdfIn PDF document text
    • https://fortlauderdale-carservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160945c815a1f5---xakiwozetibagonis.pdfIn PDF document text
    • https://dubaimotorcycletours.com/uploaded_images/files/tanuregesevotujujijad.pdfIn PDF document text
    • http://artecgroupservices.com/imagenes/file/gonevatagudasumafozobetix.pdfIn PDF document text
    • https://securityguardsupply.org/php/uploads/file/45464995802.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16081bb4dafd5a---tipififoduwuninofere.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160c8bc4691182---gamopizeso.pdfIn PDF document text
    • http://viaterrestre.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160988cf5d8744---15270678180.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c9fe7bcb4e---2095184666.pdfIn PDF document text
    • https://slide-bearing.com/d/files/sokefumika.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/bce543f9b3406fd4e7cff699bfcff563/vosupojifodazomepitunepo.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00013575.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x13575 9096 bytes
SHA-256: 104cc45bdfb1ab09de8c54275861b665f4a3b8b5d8ce5875914774050eb8cec2
font_00_sfnt_off00011698.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11698 5668 bytes
SHA-256: d05fb41dc3e206ecd0cc3bc682fbf174ff2a9b47af7c6d04e804170fc2159598
font_01_sfnt_off000129c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x129C4 2768 bytes
SHA-256: b2f1db282cdc1c367c1693c95e6e5bb290452098a27124aa7f47d9d677bafce4
font_03_sfnt_off00014f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14F64 11160 bytes
SHA-256: 9aea278b8261fd56120e34870439aceb7b9d7ba5b6447f39b2e17e8ee19282bc

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