Malicious PDF — malware analysis report

Static analysis result for SHA-256 6846683ae6583045…

MALICIOUS

PDF

88.1 KB Created: 2021-07-06 17:00:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 99050c185f6b7dc88db9882ae18677f5 SHA-1: 98cadc101183fb1545abcb489c91a3f0cba78fac SHA-256: 6846683ae65830453959b00b0ffef07fbdf16e43006f3a8804cc7bc0a86bda53
164 Risk Score

Malware Insights

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

The PDF contains a link farm directing to multiple compromised CMS upload directories, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. No scripts were extracted, but the structure and URL findings point to a malicious document designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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://aquaticlandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160719793ed133---podepe.pdf
    • https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/466c346e67aaafa785531b250c01d44d/32831771652.pdf
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160bdd7e687ad3---pubolatuvuwixera.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/q4i2u54mjrr491917e2gp5pb33/voxorajenusuf.pdf
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bbf889dee6---67148658346.pdf
    • http://www.siphonicflowmandiri.com/upload/files/82314642083.pdf
    • http://ikhmongol.mn/ckfinder/userfiles/files/9385594977.pdf
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/mffie0og8m6une3jpj23sbpns0/sotar.pdf
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e5944ce9b8---59152853804.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3a1d737a1c---94818756172.pdf
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5d866c641f---ruxazebuwenuxipewik.pdf
    • https://robertmatzuzi-massagetherapist.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1d894ea39---50141584149.pdf
    • https://estigotours.com/wp-content/plugins/super-forms/uploads/php/files/548e9702d21251fbba7dbd324059db56/95643272068.pdf
    • https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/e44428492ea4427fe7b8bccc4d48412b/39389308002.pdf
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160799794f056a---352398224.pdf
    • https://citytrafik.nu/images/file/dupaluvi.pdf
    • http://ankurgroups.com/userfiles/file/74650540201.pdf
    • https://opuntia.eu/wp-content/plugins/super-forms/uploads/php/files/92ded310367c6ebf513647db3284029b/bonefogalewuvopeb.pdf
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/ne561ebvd1q9ld9rf7neit4k5b/24391966122.pdf
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/037ce16c1e7c6174f0a9cd8a39d226fb/fubuzadexuxajejaxa.pdf
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/9067f618d1a1ea9d1b96b3a3d0db0e8b/79299701533.pdf
    • http://zechnerbau.at/images/content/files/9314744608.pdf
    • https://samiznojmo.cz/wp-content/plugins/super-forms/uploads/php/files/b97167d2e8ccb38e7e808c01cb3d3fc6/mesixozemotufoj.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=levonelle+and+ellaone
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f890.bin
56716ba5a52fd77b9f5789ecf7cc919ab3f787ac6955324f36704e0d1548a44c
pdf-font-stream PDF embedded font (sfnt) at offset 0xF890 9808 bytes
font_01_sfnt_off00010e28.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10E28 16792 bytes
font_02_sfnt_off0001263a.bin
47510920387ae5c12f72716f10e385ed91caeee8676f52a00899200666dad141
pdf-font-stream PDF embedded font (sfnt) at offset 0x1263A 17412 bytes