Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2aaba55add473f4…

MALICIOUS

PDF

76.0 KB Created: 2021-09-05 21:26:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 9d17b16e884573f44dec858c6a0e57de SHA-1: 208fd9761a5121e6b5498ec4cc2c0a2cd6b4d22e SHA-256: b2aaba55add473f4ef70d84c1770d0495d12ee95f871966a6ea4c83d5d41603b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, with critical and high severity heuristics firing. It contains embedded JavaScript, which is often used to download and execute further payloads or redirect users to malicious sites. The numerous links to external domains, many hosted on compromised WordPress sites, further indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943ad213289---95244280066.pdf In PDF document text
    • http://ansing.nl/userfiles/file/vebatisefamaf.pdfIn PDF document text
    • http://thenext.pk/userfiles/files/zokavife.pdfIn PDF document text
    • http://dioceseofniranam.org/userfiles/file/denopimokemanazoroxeduxen.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/16086d558a33e0---bisemobapixafetexe.pdfIn PDF document text
    • http://preciz.com/uploads/wysiwyg/files/92815789651.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606f46807a035---98386338157.pdfIn PDF document text
    • http://www.sevenchurchestour.net/seven/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7d2ce70aa---13582506879.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8e24b8b1ec---96911384459.pdfIn PDF document text
    • http://eduomania.com/wp-content/plugins/formcraft/file-upload/server/content/files/160839b28604c6---5207486862.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/nbu8d3uj96m8ilqh6e290v94mo/79983787970.pdfIn PDF document text
    • https://jfefood.com/wp-content/plugins/super-forms/uploads/php/files/c2df5b3ba567071fb2d902c4e0f1c6b3/72376781832.pdfIn PDF document text
    • https://www.ventisilva.com.br/ckfinder/userfiles/files/kilovuwimivagir.pdfIn PDF document text
    • http://skyrun-arser.com/js/fckeditor/editor/filemanager/connectors/php/connector.php/upfiles/file/210706052603837778asf39d.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/c75a2ce6c66e6af4bed70a8d89b7caa3/luxafozudex.pdfIn PDF document text
    • http://saxons99.com/clients/5/5f/5faa49e4155ddd0d4faf97b0d7aa3dde/File/xelelutod.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/16094b75935ec7---73920002307.pdfIn PDF document text
    • http://wx-test.com/upload/ckimg/files/202108131900106088.pdfIn PDF document text
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/e426d1f8f375761103f1c07c0d5fe48e/jesanulab.pdfIn PDF document text
    • http://technoauto.jp/js/upload/files/dolekejinasetokox.pdfIn PDF document text
    • https://cncunse.com/d/files/lazageniwurifefadowifaba.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=insanity+asylum+volume+1+nutrition+guide+pdfPDF 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_off0000c2a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2A8 11124 bytes
SHA-256: 105d21cb19c54af991fbe52fa21159c9bf338145933bca5011491bc184eacd36
font_01_sfnt_off0000dc81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC81 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f493.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF493 17500 bytes
SHA-256: 863f6ed56961b7eba8f188b4977a7d0c50d5dce24e571fa37163313ef86e0142

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