Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0f54af2a2ebdea9…

MALICIOUS

PDF

93.7 KB Created: 2021-06-26 17:41:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: bdc1664b7af4d4f73935515cd94d03d8 SHA-1: 75adcda67e9907c1dc90e3a3a68f811d6ad09fee SHA-256: d0f54af2a2ebdea9d02ae13cbf4828fbe3ed39fd6b1bc416a11696993c6a9120
156 Risk Score

Malware Insights

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

The PDF file contains numerous links pointing to compromised WordPress sites, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple distinct hosts and the use of formcraft plugin uploads suggest a coordinated effort to host malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c31e39be10f---jojumetisitivupame.pdf In PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2fe672af83---vujakosoporipiropifimepu.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c2e65746837---xenisobogakebegikasa.pdfIn PDF document text
    • https://ailani.org/wp-content/plugins/super-forms/uploads/php/files/31254216eaa091b41421c34e4139d37b/17391168204.pdfIn PDF document text
    • http://lavera.it/wp-content/plugins/formcraft/file-upload/server/content/files/16074623b25262---wasosiduwaxaje.pdfIn PDF document text
    • http://rafaelokazakov.com/file/pokefejevo.pdfIn PDF document text
    • https://area34.info/wp-content/plugins/super-forms/uploads/php/files/3vt7b4726jfailqqbu98enq226/zetuji.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/7245eb3a1cd050028527b03b698a1f15/zanaxalizawaxepovirotan.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c86edb5cb29---87338087902.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcdbcc38948---kosowobe.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/nebovosav.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608442cc99dd7---88215731528.pdfIn PDF document text
    • http://ziepniekkalns.lv/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a813c6756---29543007335.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/paxitoteze.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aace163f3c0---bafuxilefezafodipupajuvel.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/16086d790b0191---bukenexezab.pdfIn PDF document text
    • http://cabinet-blin.fr/ressource/site-image/files/sarovifipotusomurulimidib.pdfIn PDF document text
    • https://cradlegold.com/wp-content/plugins/super-forms/uploads/php/files/buai99p5atjfbrteha6cekdfek/putojapifimune.pdfIn PDF document text
    • http://donaldbermanmaimonidesgolf2021.com/clients/0/0d/0d43fbb8ff91cab41fa1b056c0d912a9/File/najetexabibetisapabopawul.pdfIn PDF document text
    • http://darienhigh69.com/clients/866565/File/30906201711.pdfIn PDF document text
    • https://bestcoloringpages.com/userfiles/file/85438232639.pdfIn PDF document text
    • https://yellowstonewildlife.com/lijetedaforedobifemober.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/zitom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=mobile+milling+service+near+mePDF 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_off00010b96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B96 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000123a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123A8 17712 bytes
SHA-256: c1ae6e55b7e5d5159961730fa43540a2f2181ae48f37d76abd1138cc781e764e
font_02_sfnt_off00015141.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15141 10676 bytes
SHA-256: be8ba4223fc8028c7adb6c5a17e6a2b6943e6b99a2f63b2e314d60cf054e3781

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