Malicious PDF — malware analysis report

Static analysis result for SHA-256 3828dcc7ef4cc617…

MALICIOUS

PDF

78.3 KB Created: 2021-09-02 09:52:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 815789238d78dadd7c5ee75ff5734baf SHA-1: 39fde930d08d16fa6f5c83c20a43c1495d0636cc SHA-256: 3828dcc7ef4cc617fb69a1d9e36bd7883b76f8bef9d1afd8486ef90d78e64c60
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and disposable domains, likely intended to lure users into downloading further malicious content or submitting sensitive information. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a pattern of using such domains for SEO manipulation, often associated with phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/d4f36a3c8d00f8c0e523a2c2f00e4644/83416550548.pdf In PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/0085e8430bb41fd11dead277260e64ea/pulosowifozowajuzoxa.pdfIn PDF document text
    • https://davaocarrental.com/images/file/38849067641.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608832ae4a948---sapivukejitup.pdfIn PDF document text
    • http://senn1962reunion.com/clients/2/2f/2fc2c703930c5c120d54ce0350dd22c7/File/60055145393.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/fenur.pdfIn PDF document text
    • http://www.barankayalar.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16106204295e4c---feboz.pdfIn PDF document text
    • http://www.driftime.ee/wp-content/plugins/formcraft/file-upload/server/content/files/16084ce91bed1d---nekililu.pdfIn PDF document text
    • https://jahanchart.ir/data/files/file/gabasebo.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102ed6891b4e---jajegenipididotik.pdfIn PDF document text
    • http://alexanderjamesbackcatalogue.com/userfiles/file/wedikoxatoganovifagezume.pdfIn PDF document text
    • http://buergerforum-tirol.at/file/76984649048.pdfIn PDF document text
    • https://reparationmobile.net/userfiles/file/76511846596.pdfIn PDF document text
    • https://brawlcall.com/ckfinder/userfiles/files/55513602742.pdfIn PDF document text
    • http://sskj.pl/userfiles/file/lusonalovozobowe.pdfIn PDF document text
    • https://lolakarimova.uz/ckfinder/userfiles/files/rimikefok.pdfIn PDF document text
    • http://nhs-carpediem.com/clients/46367/File/10925384419.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609479ac4c35f---refoxib.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/ffb4b1c3751e600acc4352d673784e37/kotofoximo.pdfIn PDF document text
    • https://tirthmobile.com/wp-content/plugins/super-forms/uploads/php/files/7apooc4n2tdpscht85ucqj6kr8/sodiliwazazapelomafunaxob.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2e3766d07c40c9f6b279aef0909ca3c4/23230957369.pdfIn PDF document text
    • https://medsplus.us/admin/images/file/kinatibulawonav.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2313679d72---maluvapikoxuwogezav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=pdf+to+excel+converter+online+100+pagesPDF 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_off0000cb94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB94 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e3a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A6 17724 bytes
SHA-256: b9c26c929287a26b93bb8ab30db5a51fcf846106b7a59a7105f718d8386b56ff
font_02_sfnt_off0001111a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111A 11136 bytes
SHA-256: 9bc9944b1a6119757f637a922706e8a605f3e65629d2a1c0813ed9cc2436a488

Open this report in the interactive analyzer, or submit your own file for analysis.