Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfe2a4b44b88ead9…

MALICIOUS

PDF

71.1 KB Created: 2021-09-24 17:59:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e8ca58fecf65a023f205e89f80d1f2d4 SHA-1: 8b8cbaa2e11404ed1c15ae0729da13a4761239f6 SHA-256: cfe2a4b44b88ead9eb12bff910dd90a088257f21c6c1c862b86e48df38883afb
164 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and multiple external URIs, many of which point to compromised WordPress sites acting as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to download a second-stage payload. The embedded JavaScript is a common technique for exploiting PDF vulnerabilities and initiating further malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16138abaed6852---kelaxipup.pdf In PDF document text
    • http://laboratorioshamalab.com/userfiles/file/xomemozorafojikowasigeb.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16139a4edc93bf---nekarimijomel.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/161302fde1a4e2---80472134127.pdfIn PDF document text
    • https://inoxquochoang.com/app/webroot/files/images/pages/files/24637234109.pdfIn PDF document text
    • https://coolinterier.sk/upload/files/fexusumunozasuxefe.pdfIn PDF document text
    • http://dges.in/userfiles/file/gesemonilub.pdfIn PDF document text
    • http://autofactory-jin.com/js/upload/files/fogijap.pdfIn PDF document text
    • http://nedirajtebosnu.net/userfiles/file/bowapagusaronim.pdfIn PDF document text
    • http://cesishotel.lv/res/wysiwyg/file/jisuma.pdfIn PDF document text
    • https://accu-split.com/userfiles/files/32661842840.pdfIn PDF document text
    • https://interativacorretora.com/fotosempresa/files/gekotireni.pdfIn PDF document text
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/sudasimisewufenopegupiwov.pdfIn PDF document text
    • http://www.lentilles-progressives.fr/wp-content/plugins/formcraft/file-upload/server/content/files/161494b1a14f5c---96322644335.pdfIn PDF document text
    • https://superlitefan.com/uploads/files/18597824495.pdfIn PDF document text
    • http://www.radioemka.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613304262f1b4---37016349015.pdfIn PDF document text
    • https://ichibaninfotech.com/ckfinder/userfiles/files/5554105792.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/25743473088.pdfIn PDF document text
    • https://ceccardolj.ro/userfiles/file/543114102.pdfIn PDF document text
    • http://faisaltowel.com/survey/userfiles/files/86919640574.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/vokefizakufa.pdfIn PDF document text
    • http://materialdeestudo.top/userfiles/files/37152991002.pdfIn PDF document text
    • http://tcsklife.com/filespath/files/20210906101748.pdfIn PDF document text
    • http://luberoff.com/userfiles/file/6479727475.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=app+to+lock+text+messages+on+androidPDF 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_off0000b295.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB295 11032 bytes
SHA-256: fdc8c5af09815eebc35f0f32202af8a6d0477b95e709afbbe4ebe278adb797fe
font_01_sfnt_off0000cc13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC13 16824 bytes
SHA-256: 57d60a11d611a204b0e8fe3fff85965100aa4875e8288aed026ba8bc4e3274bd
font_02_sfnt_off0000f6c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6C5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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