Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c2d01b7a96dac3e…

MALICIOUS

PDF

83.1 KB Created: 2021-09-06 17:59:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 4fed714d2bf24e11f6f21671b2a7199d SHA-1: d69fabb3cca91e6c83f4f37c96c6ed9080d0883f SHA-256: 7c2d01b7a96dac3eab72726d875ba59b5d0f28c5a5b35b4dd1a6b906f9435dc9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. It also features a large number of external links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious or phishing content. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1606caa1df1fb1---tiror.pdf In PDF document text
    • https://vildmarksjagt.dk/userfiles/file/1186839350.pdfIn PDF document text
    • https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/4btbmepk9j2iemtfa00nifbkio/97276049099.pdfIn PDF document text
    • https://www.info-service.com.tw/plugin/ckeditor/ckfinder/userfiles/files/podasosora.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/7372c1c50b603dc8e82d1f9769201b5d/21001074735.pdfIn PDF document text
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/631d2152398bc52bc0f354d9eb20a47d/gibumexivat.pdfIn PDF document text
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/v8k5hr4biqd80t62agvit6tqj5/77344251782.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/4f2503333290251294c657d4fed00693/40321080301.pdfIn PDF document text
    • http://recrute.fr/files/files/jisilanifebukipuxofe.pdfIn PDF document text
    • https://coimbatorepressclub.com/FCKeditor/userfiles/file/daxawewagiju.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/fapovatubatu.pdfIn PDF document text
    • http://bendhigh1970.com/clients/1/10/106e6567aa8bd3cecf4080670b11bd10/File/63148016111.pdfIn PDF document text
    • https://matteagianotti.ch/userfiles/files/juforofudus.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160b87f245a22f---58242927078.pdfIn PDF document text
    • http://camberwelltaxi.com/survey/userfiles/files/bonelanokokipabulabu.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210624005650_o63i6r.pdfIn PDF document text
    • http://hzjksj.com/images/upload/File/terivogabodefaxoz.pdfIn PDF document text
    • http://logistra.fr/ressource/site-image/files/nexij.pdfIn PDF document text
    • http://reliancefla.com/admin/images/file/67753976851.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/guxapifarazadajopudesefu.pdfIn PDF document text
    • http://bienbao.org/uploads/files/17055807408.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/08de9dc82fe48f5c54f8f68e9330b566/51842053726.pdfIn PDF document text
    • https://n-zvuk.ru/upload/file/rarezi.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e008479a172---gakazofegewabodu.pdfIn PDF document text
    • http://www.jacenter.org/js/ckfinder/userfiles/files/90404043976.pdfIn PDF document text
    • http://globaltruthmediagroup.com/clients/a/aa/aa8380eac451876ae6ab993bf3a720d6/File/setofibik.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=software+manual+testing+training+onlinePDF 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_off0000e00b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE00B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f822.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF822 10816 bytes
SHA-256: a8fc514c41ca41f9dc63ee3a9b06de64c7f0c3eef78a46bb3bec3e7f719cb719
font_02_sfnt_off0001111e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1111E 17492 bytes
SHA-256: 80fb4f12046853cdbc197552bf29945bb1a9cb32cf398e2bb3a278a95e231afe