Malicious PDF — malware analysis report

Static analysis result for SHA-256 32403061d4a19720…

MALICIOUS

PDF

80.0 KB Created: 2021-09-07 14:59:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: a252923d02205015fd69c093a10e65bf SHA-1: cd2c7d44c79eccf3757c0d0a3a40e3724b37ee7d SHA-256: 32403061d4a19720ee9c54570eb01508f7dff951166a975d4670de522520f74e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded JavaScript stream and a large number of external links, many of which point to compromised CMS uploads or disposable hosting, indicating a phishing or spam campaign. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware via the link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://wrtour.com/FileData/ckfinder/files/20210702_89E85872E0F3BAF5.pdf In PDF document text
    • http://www.mueblesgamez.com/ckfinder/userfiles/files/92235261772.pdfIn PDF document text
    • http://congtydaihai.com/upload/files/90707357855.pdfIn PDF document text
    • http://barudan.hk/UploadFile/file/20210702145423338.pdfIn PDF document text
    • https://electrabicycles.pl/app/webroot/uploads/file/16224420777125.pdfIn PDF document text
    • http://massimobertoarchitetto.com/userfiles/files/razowugomogija.pdfIn PDF document text
    • https://nullemont.fr/nullemont/ckfinder/userfiles/files/9220055236.pdfIn PDF document text
    • http://1137.jp/app/webroot/js/ckfinder/userfiles/files/duwemoralofuluve.pdfIn PDF document text
    • http://cosmoscm.com/contents//files/dotor.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/16070cec80ad4c---muxazazijunidesizurakon.pdfIn PDF document text
    • https://dacinsara.ro/fckfiles/file/rokule.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609496953a4ab---48680104189.pdfIn PDF document text
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/075b60cc6aa631069e7c973081033bc6/91047472400.pdfIn PDF document text
    • https://yourlightingbrand.com/wp-content/plugins/super-forms/uploads/php/files/ebac50a345bf457d7b590bff05a3b5a2/75821206157.pdfIn PDF document text
    • http://didongsinhvien.com/upload/files/3359551158.pdfIn PDF document text
    • https://broadstripe.com/wp-content/plugins/super-forms/uploads/php/files/7a5888965a0dc8a7df21373ffc815ccd/79085106546.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/78009235648.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dca9de3a3c---60541130089.pdfIn PDF document text
    • https://www.charroninc.com/wp-content/plugins/super-forms/uploads/php/files/74e95f0535ac4150b95c1399472c3585/wuxemuxabereb.pdfIn PDF document text
    • https://marblobath.com/app/webroot/img/files/xugikakoxodosowimexavu.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f91f671141---mezovumusovi.pdfIn PDF document text
    • https://m-isc.com/userfiles/file/95858099939.pdfIn PDF document text
    • https://pendekaremas.com/contents//files/75307333191.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=convertidor+de+pdf+a+excel+en+linea+gratisPDF 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_off0000d020.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD020 19000 bytes
SHA-256: 8552d3905c8371e3ae50325014b4aca1cea5fdd129c197b9dba15d99052ac20a
font_01_sfnt_off000100c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000118dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118DD 10992 bytes
SHA-256: 49feefac8a3e05210a5f05f5b0e4fefa49505dcb60a692d76918c3c4857d6cd5

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