Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b9c0371982997ea…

MALICIOUS

PDF

71.6 KB Created: 2021-10-01 01:25:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2bc4754f3a88b7ec01346ef7ed44d0db SHA-1: d01b9c51cb2a9506e4e7bb2714767bbeb24adee5 SHA-256: 9b9c0371982997ea32a09b612651f64066ac8f996b82c0c95e333d2d334811b8
156 Risk Score

Malware Insights

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

The PDF contains numerous links to various domains, many of which are identified as link farms on potentially compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and link farm heuristics points towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9885

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://polnische-zaune.de/userfiles/file/xilumor.pdf In PDF document text
    • https://canionglobal.com/FCKeditor/file/29209488885.pdfIn PDF document text
    • https://fontan-montag.ru/img/upload/12202089750.pdfIn PDF document text
    • http://botaierpharm.com/upload/files/10716205655.pdfIn PDF document text
    • http://yuemeism.com/uploadfiles/files/vesonatujamawapol.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/sofuwiboxesezo.pdfIn PDF document text
    • http://joy05.com/_UploadFile/Images/file/34390164649.pdfIn PDF document text
    • https://jf-orvalho.pt/userfiles/file/74287705428.pdfIn PDF document text
    • https://woft-dining.com/webroot/editor-uploads/files/6026950631.pdfIn PDF document text
    • http://svarovani-tig.cz/userfiles/file/lalut.pdfIn PDF document text
    • http://xn--d1achljw0b.xn--p1ai/content/upload/naviza.pdfIn PDF document text
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/8182ed00e90f25e508af319911c63b73/99676360601.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///fonukonirekegefufe.pdfIn PDF document text
    • https://xn--p3t29jo1ed4o4xw.tw/upload/files/rarub.pdfIn PDF document text
    • http://fairbank-ia.org/admin/ckfinder/userfiles/files/71923448075.pdfIn PDF document text
    • https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1615194a1e8617---15800897373.pdfIn PDF document text
    • http://namadagaskare.ru/ckfinder/userfiles/files/wikulurufuvavixarev.pdfIn PDF document text
    • http://i-akparat.kz/ckfinder/userfiles/files/99411799489.pdfIn PDF document text
    • http://upakuika.com/img/file/93294203303.pdfIn PDF document text
    • https://unitedcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146a8876ef6a---gojozutilojej.pdfIn PDF document text
    • http://lammensfilip.be/uploads/files/4363991129.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1614fd2af28413---bewilud.pdfIn PDF document text
    • http://sungwoneng.com/upfile_editor/2021/files/33221296851.pdfIn PDF document text
    • http://alpes-de-haute-provence.proximeo.com/ckfinder/userfiles/files/40625516140.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161343acd57994---45384729155.pdfIn PDF document text
    • http://www.naraihillgolf.com/admin/userfiles/file/risazub.pdfIn PDF document text
    • http://purofirstli.net/userfiles/file/61572786219.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=headache+vomiting+dizzinessPDF 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_off0000b4ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4EA 17368 bytes
SHA-256: 5fcf46bb328133d0dbcc5a951029d9ee6b55316fa5f3ac4ee9bd9ae39b92c818
font_01_sfnt_off0000e01e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE01E 10788 bytes
SHA-256: 735200726d2f33fae5890e04c8ee49a01b4f39f7b9dc2c971dc97994cb6d1b0f
font_02_sfnt_off0000f88e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF88E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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