Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6e82d6d204666f3…

MALICIOUS

PDF

91.1 KB Created: 2021-07-02 05:21:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6181a3150bfde0d92c36c5f3ccecc465 SHA-1: cd93aac018ccb1a0885eca4e44cdcdac7c1b1952 SHA-256: e6e82d6d204666f301b421393e5450e5110667c18e7089d8afe7b5bcc32d1b56
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicated a high probability of maliciousness. It contains a link farm pointing to compromised WordPress upload directories, suggesting it's used to distribute malicious content or lead users to phishing sites. The presence of external URIs and a link farm on disposable hosting further supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://www.hospedeagora.com.br/wp-content/plugins/super-forms/uploads/php/files/9h312i40ojebcs59ir5nfvdmpc/62182145975.pdf In PDF document text
    • http://goldnumber.info/userfiles/file/23889802111.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16098347e7b997---69745109384.pdfIn PDF document text
    • http://inlikeflintlogistics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa3db83ea83---42561236588.pdfIn PDF document text
    • https://jennysbooks.com/wp-content/plugins/super-forms/uploads/php/files/0955a04fa7b30d9c4fac1c089b203130/vegitetureguwaf.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a979c768ef5---mexalupekulisugedumo.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cfd5098d9f8---dafipakutejozekiduguxilav.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160867bd9a5a99---24757443888.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/892438237.pdfIn PDF document text
    • https://hpsoft.shop/upload/files/sonoboduketakag.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160813aae80251---kefij.pdfIn PDF document text
    • https://www.sehersirin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fabe72ba3---zifivujov.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160730d0724a88---64644719474.pdfIn PDF document text
    • https://aradovan.com/userfiles/file/sobowegakutelof.pdfIn PDF document text
    • https://warungmimpishio.com/contents//files/dilunoretexesolip.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/1aab870bddd987f422dc0fcc871a305f/26886706204.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/160777b47315d1---78741546776.pdfIn PDF document text
    • http://opalbiosciences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b462bb2c59c---danezite.pdfIn PDF document text
    • https://quickonboarding.com/wp-content/plugins/super-forms/uploads/php/files/06c5052f138412ee3047f6999ecaa863/zatonafodi.pdfIn PDF document text
    • http://ipjanah.ir/wp-content/plugins/super-forms/uploads/php/files/9egso6qo665pmg155rpr149941/37891293786.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c91afb02198---73678909670.pdfIn PDF document text
    • https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/fhpspg2a2qlustk5gonbjjqqer/panatowexarogilo.pdfIn PDF document text
    • http://dragonera.cn/admin/userfiles/file/dibelimagawifemasula.pdfIn PDF document text
    • https://srmhospitalities.com/images/bulk_images/files/dazijopomoxepelebikobalod.pdfIn PDF document text
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/16084fd8b1a468---5457481834.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606c6c417f6f9---12499382420.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=tomato+juice+and+prostatePDF 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_off000101fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101FC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011a13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A13 10820 bytes
SHA-256: 3dc5bf59080e3becdf60aab101d1d34287f1f380139512a4d62471bd011ba05d
font_02_sfnt_off000132f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132F8 16920 bytes
SHA-256: d53808c45e0e74392574f859a2d8b58f8ce55b84838ddf1e837038536734c81e

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