Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0b36fd62287a502…

MALICIOUS

PDF

83.7 KB Created: 2021-09-03 21:01:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 11aea21a3d07ca6efeb772d4be0c0d3d SHA-1: 83b23dc7083068222f7a48bdd16a0362290fa53d SHA-256: e0b36fd62287a50216865e6f60511b22d5fb2b9ca499bb1eaeb81cbbdadafea2
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware delivery.

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://coatielectronica.com/files/gasofesogusumopopilusugu.pdf In PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/161154f5726112---74342457971.pdfIn PDF document text
    • http://ituor.ir/basefile/chartermeinfo/files/pilopexaparojaretuxuj.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16075bc9be2c10---30362138595.pdfIn PDF document text
    • http://samtekelektrik.com/files/rolejotiwewakikizixewasus.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5939ba1daf---55930309730.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/fc213fdd66d9ebf94f3e4428162e2c81/paxetijagagobiwadixusa.pdfIn PDF document text
    • http://hz-kontejnery.cz/ckfinder/userfiles/files/lupuzalepesoro.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/vmpna10es5qhdjnulhnui3avp6/zabadeduwerot.pdfIn PDF document text
    • https://hkparkkonutlari.com/image/files/zusezapunovisapasiboz.pdfIn PDF document text
    • https://chrmglobal.com/userfiles/file/semibuvezar.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/74d3bc8086e3e81b18a2e40eeefd49da/47521655680.pdfIn PDF document text
    • http://bluedevils59.com/clients/862365/File/ruzol.pdfIn PDF document text
    • https://mindweave.co.uk/wp-content/plugins/super-forms/uploads/php/files/4mqciakib92q339p3h4uprpjvd/jevirebawoxap.pdfIn PDF document text
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/beb16a9149a8ac81a871f7fd629fb7ef/77162297364.pdfIn PDF document text
    • http://mebelhotel.ru/images/news/file/zozegobejokod.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a040e949183---bokularosuzikaman.pdfIn PDF document text
    • http://ahrestygz.com/userfiles/files/20210811_044612.pdfIn PDF document text
    • https://adepotcustom.com/UploadFiles/file/20210430043706181.pdfIn PDF document text
    • https://rts-wm.com/ckfinder/userfiles/files/pizazenifowivisoni.pdfIn PDF document text
    • https://cal.lighting/wp-content/plugins/super-forms/uploads/php/files/d73273a3c673869aee297ccbf000bff8/danidekeguv.pdfIn PDF document text
    • http://www.sanruou.com/app/webroot/uploads/files/ziwewematebe.pdfIn PDF document text
    • http://secretinvitation.net/images/files/xakasezakowobodepin.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=modal+arpeggios+guitar+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_off0000dfcd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f7df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DF 18848 bytes
SHA-256: c40cfd182cdb02531dd0129c0df0c27c44408664d6ad2fa76f5405e7be5dd305
font_02_sfnt_off000128fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128FA 10664 bytes
SHA-256: 540579561be1a8ed5d95118b618a286c996ef8357cd8066ad53bbc04e1cebdcd