Malicious PDF — malware analysis report

Static analysis result for SHA-256 2111b12a7eeba0ea…

MALICIOUS

PDF

133.4 KB Created: 2021-06-29 01:37:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 6b04126f0c005435ad206932b0503394 SHA-1: 07301d7a45fc9c2d6da60bd17e93e7979ccfe907 SHA-256: 2111b12a7eeba0ea7fa1c971e8d5c413569d58dc70bd7b818523459476ec850b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains embedded JavaScript, which is often used to initiate malicious actions. The PDF also functions as a link farm, directing users to multiple external URLs hosted on potentially compromised WordPress sites, suggesting an attempt to distribute further malicious content or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075eeefe2e49---45441558072.pdf In PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/monulifipesonunuveb.pdfIn PDF document text
    • http://hk-sai.com/ckfinder/userfiles/files/pilanafito.pdfIn PDF document text
    • https://i-chat.tw/js/ckfinder/userfiles/files/ronekasebib.pdfIn PDF document text
    • https://carparts-fixture.com/file/file/pudokejosamiv.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8b9d82fef9---56101160732.pdfIn PDF document text
    • https://pet-fashion.ro/mm/file/libapexodekopuxi.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b2aea5da942---dagivuzometota.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/a88d987e904f67260bcdf718f913fcd9/malesefixov.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609ec72c61f96---52655286613.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982e778d96e---kusipemisuzodezajunane.pdfIn PDF document text
    • https://socialacademy.gr/wp-content/plugins/super-forms/uploads/php/files/250ae2188a78949673156400a3288685/17631662472.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/e03848ee95276c2e66b0d13d37981694/siwajuwulosilatep.pdfIn PDF document text
    • https://towa-aaa.jp/userfiles/file/wipunikiwut.pdfIn PDF document text
    • http://rustproofingottawa.com/userfiles/file/segopobimixifidaso.pdfIn PDF document text
    • http://www.evisiontiendaonline.com/ckfinder/userfiles/files/lutoxesolida.pdfIn PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/75855367462e5d1437d7d34e72ec3262/bofuwabivo.pdfIn PDF document text
    • https://acrgroup.nl/userfiles/file/nunuru.pdfIn PDF document text
    • http://aeronautike.com/userfiles/file/41619381295.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/f237ae17461ce700e2bc0b3f173021b5/bimilakepovozuv.pdfIn PDF document text
    • https://robinio.de/wp-content/plugins/super-forms/uploads/php/files/n0amj01fudf9uia6ars3mdo223/fupofuker.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=language+gender+and+culture+activity+12+answersPDF 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_off0001aa5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AA5A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001c271.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C271 10920 bytes
SHA-256: 31db83351f694247672292c65573dbc39cc98b2037e5966ada221c965cb322da
font_02_sfnt_off0001dbc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DBC8 17016 bytes
SHA-256: 7461be9fe8fb627129470cef3c76adf2d803f618b8e1296a3172b80f26679d73

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