Malicious PDF — malware analysis report

Static analysis result for SHA-256 296a029d92b967ad…

MALICIOUS

PDF

92.0 KB Created: 2021-07-14 06:58:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 8b297537f954efdb6beaeddd519f56a7 SHA-1: acc936fbe62ab445869cf81ea432551050a4268e SHA-256: 296a029d92b967adc3d885a4f4e5f9c1b844b3349ed929b1b4c02c1b1c23fb3a
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, suggesting an attempt to distribute malicious content or phish users. The presence of numerous unknown URLs indicates a broad distribution effort.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9820

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://sugarfree-gelato.com/upload/file/80000399169.pdf In PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aa31665606b---26502490512.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/monigaxepefo.pdfIn PDF document text
    • http://zulassung4you.de/bilder/file/kubanunuvowadezatefufarev.pdfIn PDF document text
    • https://bcbc3399.com/upload/files/20570079340.pdfIn PDF document text
    • https://thriveelearning.com/wp-content/plugins/super-forms/uploads/php/files/6e50f2a008c49ae6a354318623ad815a/21561460334.pdfIn PDF document text
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/d4638ca8be84bfc16e8faf6778b513bc/45966632765.pdfIn PDF document text
    • http://thegroverestaurantnj.com/userfiles/files/jebipakogosebezakole.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/35202636177.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160785d57b612d---93177684847.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4c05fc57cc---75865660017.pdfIn PDF document text
    • http://www.awakohchang.com/image/upload/File/4006538903.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160887cb080849---65215270960.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fef802597a---mififowakimogopig.pdfIn PDF document text
    • https://eitmedu.in/ckfinder/userfiles/files/dewijopu.pdfIn PDF document text
    • https://xistenze.com/files/files/sijamugugadotuvele.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c0fef72aa93---mibedofabijafeli.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160b6df65cec01---54766000638.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160826b0fa1a09---51900627918.pdfIn PDF document text
    • https://roshindelivery.ae/userfiles/files/sabakaton.pdfIn PDF document text
    • http://lapenya.cat/imgjovesnaves/file/ziperufijukizozumid.pdfIn PDF document text
    • http://zhengfutz.com/v15/Upload/file/20215211514471765.pdfIn PDF document text
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/1ea2b0adae6256cc7cda6fb86c446a11/zijivolesekunarorawigid.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/posaxawajelutopafukelaz.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/adf0daa19c02794b534d9996729c83a3/21682322391.pdfIn PDF document text
    • https://beaufortbond.com/wp-content/plugins/super-forms/uploads/php/files/1031c86e93d292720002b43ef3d2163b/pogometowesepisomine.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=225+pounds+in+kgPDF 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_off00010660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10660 10376 bytes
SHA-256: 6f34bec28af9e3f42495e0ef7f13c2341970e4c880391931adea82d925895598
font_01_sfnt_off00011dbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DBF 17256 bytes
SHA-256: b2ba178fb6d0d333ac18b4f0a5ec124a4fa8abf25007c5cfa7f89d5fa9f0673c
font_02_sfnt_off00014aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14AAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1