Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6b96e3451f6a1ac…

MALICIOUS

PDF

85.2 KB Created: 2021-07-26 18:57:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e41f512cc0bc85d1a840e3a1bcd0d4b4 SHA-1: 1b0524bee2df904507d88b58cf915350ffe20b80 SHA-256: e6b96e3451f6a1accc7776710e096c107009c41aa6c7e50c295bb286fc1690bc
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URIs, many of which point to compromised CMS uploads and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are characteristic of phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://saleskerala.com/ckfinder/userfiles/files/28895054722.pdf In PDF document text
    • http://a-range.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c4cd1beb5c4---telokedozebifejelozuvuro.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/sovejezifijogeredagaz.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/6379f1f90fe0c770384562ab2631dd00/fabidagomuz.pdfIn PDF document text
    • https://chiataiec.com/userfiles/Proj_Name//files/49813925635.pdfIn PDF document text
    • https://bistakalikotenetwork.com/userfiles/file/40504868362.pdfIn PDF document text
    • https://handinhand-daycare.com/ckfinder/userfiles/files/xojat.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/jasezudokeralegiva.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/43c7f412a80f69257efdff26b400cf85/pipene.pdfIn PDF document text
    • http://tms-technology.com/ckfinder/userfiles/files/kozerisan.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/3b1pvmb0ec1e9vjigg2tkl88rt/88740788731.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/537bb6384c1efef35b1bf79201ce56f0/refenevanedixudilobu.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/160797854ccd82---73304407232.pdfPDF link annotation
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608d4fd363ba6---61802216665.pdfIn PDF document text
    • https://avela.md/userfiles/file/45233999000.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/fekedilozemanutisoguxal.pdfIn PDF document text
    • https://selectwifi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aac6bf20860---jitij.pdfIn PDF document text
    • https://nsck-cykelmotion.dk/userfiles/file/31079338456.pdfIn PDF document text
    • https://www.ezhealthcheck.com/wp-content/plugins/super-forms/uploads/php/files/9csn4s3e1achnue95iju03blqa/46163494757.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/65393548540.pdfIn PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/493c6dcb930e3286aa420f644eb52774/givebuvidoz.pdfIn PDF document text
    • http://robertoantoniz.com/resources/original/file/xexufexilorulividowex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=how+to+prepare+gap+analysis+reportPDF link annotation
    • http://zs.tom.ru/jsplugins/ckfinder/userfiles/files/fofonuliwede.pdfIn PDF document text
    • 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_off0000e9de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9DE 10620 bytes
SHA-256: fa78099090f6b2413fdf58741d7c3a8151f36ec70499b1b426ca83c9bf9603f1
font_01_sfnt_off0001024f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1024F 17332 bytes
SHA-256: a3bace38bd208a61006114eb629b8aa3eebfe91668b74bf9f2166680f69d7395
font_02_sfnt_off00012f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F51 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1