Malicious PDF — malware analysis report

Static analysis result for SHA-256 5084f7268f0459e1…

MALICIOUS

PDF

80.3 KB Created: 2021-08-16 18:45:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: afbc7d1666ede5ccadb95cf2b371ee2b SHA-1: 058eec1340256f8bd2f09943ad84d177cb2778b5 SHA-256: 5084f7268f0459e1ff7a5e4bf06107a51da1e8ffc3ec56a37f47d4922086e015
156 Risk Score

Malware Insights

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

The PDF document was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://thepetrichortouch.com/wp-content/plugins/super-forms/uploads/php/files/k060v8uj5mhi18ph4bdvv1uf17/45055374991.pdf In PDF document text
    • http://angelojrobles.com/admin_initial_test/userfiles/file/zupupukinabugifaj.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/16072a3a77f926---17082119301.pdfIn PDF document text
    • https://basisnomor.com/contents//files/zokaper.pdfIn PDF document text
    • http://cachnhietwin.com/luutru/files/nupuromokixiz.pdfIn PDF document text
    • http://tjsijiqing.com/ckfinder/userfiles/files/2021/0607/d530c1b9a9ed752728ca0d7593ab7bdd.pdfIn PDF document text
    • http://thuocnam.xyz/images/files/wewetozidug.pdfIn PDF document text
    • https://path.mn/userfiles/files/51312982491.pdfIn PDF document text
    • http://tylincms.com/userfiles/files/28178765383.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/80715188949.pdfIn PDF document text
    • http://dtcguild.org/clients/80367/File/tenoxolexalikuravo.pdfIn PDF document text
    • https://stmarys-perthamboy.com/upload/File/33089658569.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/69813888310.pdfIn PDF document text
    • https://prsnashville.com/wp-content/plugins/super-forms/uploads/php/files/da8c590d673329d88ecfac8282063370/kerat.pdfIn PDF document text
    • https://asset-books.com/userfiles/file/ximorifikavagogizepa.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff269d3684---kumorusekomekinemewari.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/buxuzigenukajinowogup.pdfIn PDF document text
    • https://istocdukkan.com/userfiles/files/bukujotobunavadopuvol.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/653588e4aecd179e06e7caa878754388/nenimenivozak.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/hfmvq1kpobilactb8km5gfdkhk/zedujuz.pdfIn PDF document text
    • http://luxe-pools.fr/i/File/gubawamapafulolokilono.pdfIn PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160841f0ea43fd---95201339121.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607293c89ee85---85558267626.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=8+ball+pool+instant+rewards+free+coins+app+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://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_off0000d7b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000efca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCA 10952 bytes
SHA-256: e908ca0bf202530cb8b7d040e284ba5bae4b94dea560b80df7d6584da09d0f39
font_02_sfnt_off0001091d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1091D 16272 bytes
SHA-256: 87079c04e95420edc9e221705c94413f8635f25008ec477cf149accfe5e7b500

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