Malicious PDF — malware analysis report

Static analysis result for SHA-256 30d5c489ccd6d1b4…

MALICIOUS

PDF

88.7 KB Created: 2021-06-28 23:44:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 52fe126f667f5fea627e6bf213e52405 SHA-1: bd611179078e6fab64582f9f404b76fff532d989 SHA-256: 30d5c489ccd6d1b4d9f0acab6d45b64f84ce5fb1cdb7dc4e5564c836f6b664f2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics as a link farm, directing users to numerous external URLs. Several of these URLs point to compromised CMS upload directories and disposable hosting, indicating a likely attempt to distribute phishing content or malware. The ML classifier and ClamAV detection further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://portalcom-b2b.es/img/user///file/_0386802001620224388.pdf In PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d6vfv3v50rcldhtu2kcq6apoc4/10196706738.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/417a7a64f6f3f7302d041f072b52d812/85565968546.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/7abc87c9f6503b3a8745febafa15f72e/66107134530.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/13313886074.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a46de4e5688---8373215387.pdfIn PDF document text
    • http://leesfeest.nl/leesfeest/sites/default/files/file/5258105626.pdfIn PDF document text
    • https://allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/464358dc64d3b5787e3ee628af2d79c5/79588633086.pdfIn PDF document text
    • https://burmesecatclub.nz/wp-content/plugins/super-forms/uploads/php/files/c12c58c27a75dc325cdae5cbb97bdc89/15889275097.pdfIn PDF document text
    • http://gapoom.com/upload/fckeditor/file/xuxebisujufobofebike.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/7fe7bd1d0e1e0f82dcff466bb9ce50e1/25173403586.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bc0c683c0a1---rabibuk.pdfIn PDF document text
    • https://aprilboya.com/userfiles/file/94732197264.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac3ca05e48---41302670580.pdfIn PDF document text
    • http://ajisushionline.com/uploads/files/93456596189.pdfIn PDF document text
    • http://cck-brno.cz/ckfinder/userfiles/files/29434875035.pdfIn PDF document text
    • https://kede.org/userfiles/file/23215863978.pdfIn PDF document text
    • http://snypes.nl/img/customer//files/lowexakezapixapulu.pdfIn PDF document text
    • http://songiadabinhphuoc.com/upload/ck/files/44245131356.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/0e8ea123265d8b30d410e1377660680b/golebesafufokefun.pdfIn PDF document text
    • http://www.consorcio.edu.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16099efd3bc3f4---siwabugabudugapifiw.pdfIn PDF document text
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/vebuselojuxiz.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160818292ac522---jimaxupapopevitufalizu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=citizenship+test+questions+in+spanish+pdfPDF 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_off0000f62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF62D 17728 bytes
SHA-256: c1f8a3d2879a4bff4d177220bc1e73b2a209f0bb4606fc9d7bf689894be8da10
font_01_sfnt_off00012479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12479 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013c90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C90 10784 bytes
SHA-256: 5609233d37271137116bff9b6a5bd22c1454bd9e0af693ffc19bf9325a861f87

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