Malicious PDF — malware analysis report

Static analysis result for SHA-256 e014521f9236ab7a…

MALICIOUS

PDF

68.8 KB Created: 2021-09-18 17:53:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: b7599ca55335d6f07156eac48db870e6 SHA-1: 19c331ad34601b33783c7b39432af40ed12db178 SHA-256: e014521f9236ab7a3df0afb9b549ab7238981c2ce628ea49b5fc58e864b5023e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to numerous external URLs, including suspicious domains like pixomot.ru and live-lessons.net. The PDF structure and embedded URLs suggest an attempt to redirect users to potentially harmful content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://pixomot.ru/uplcv?utm_term=can+you+download+emoji+on+android PDF link annotation
    • http://live-lessons.net/lcj/web/uploads/assets/file/wodebedewon.pdfIn PDF document text
    • https://aluminiosarla.com/userfiles_arla/files/59530285051.pdfIn PDF document text
    • https://tp-pos.com/uploads/image/files/lukosur.pdfIn PDF document text
    • https://onlinendttraining.com/files/rinumobaxixadosebimo.pdfIn PDF document text
    • https://12waktu.com/contents/files/govosixazegivir.pdfIn PDF document text
    • http://anapharmata.hu/ckfinder/core/connector/php/files/83011436506.pdfIn PDF document text
    • http://k12kos.com/ckfinder/userfiles/files/lironalesiriwuzu.pdfIn PDF document text
    • http://hsaltsj.com/uploads/files/fesidatupelevoriforujixa.pdfIn PDF document text
    • https://onlineadda.net/ckfinder/userfiles/files/kawadozivusetutowaxebo.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f945f09619---8036341167.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kitenopuvapowofipal.pdfIn PDF document text
    • https://medarbindia.org/ckfinder/userfiles/files/vutirisama.pdfIn PDF document text
    • http://mskgroup-spb.ru/upload/file/lukolojalesuli.pdfIn PDF document text
    • http://zabbeleecooking.com/ckfinder/userfiles/files/92641453301.pdfIn PDF document text
    • https://exlite.it/ckfinder/userfiles/files/64138367704.pdfIn PDF document text
    • https://sanmuabancongty.vn/images/content/files/53598873540.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613634a4731a9---61391608495.pdfIn PDF document text
    • http://lonniestireandauto.com/nbloom/fckuploads/file/99124695409.pdfIn PDF document text
    • http://xn--ob0bjxt9h99icicrvkksa421cwwp7hiv4d6a.net/ckfinder/userfiles/files/zuvovigijowowesedop.pdfIn PDF document text
    • http://roocenter.ru/upload/file/20013439055.pdfIn PDF document text
    • http://decom.pro/admin/ckfinder/userfiles/files/68526552017.pdfIn PDF document text
    • http://www.grifin.sk/files/2847232697.pdfIn PDF document text
    • https://ta-taiwan.com/app/webroot/userfiles/files/vawexom.pdfIn PDF document text
    • https://global-product.org/CKEdit/upload/files/susowebuxutorit.pdfIn PDF document text
    • https://h16hr15k-h19hr37urn.com/contents/files/zibozunuzetewum.pdfIn PDF document text
    • https://www.bbmnetlicitacoes.com.br/cms/ckfinder/upload/files/fitilakiletujijan.pdfIn PDF document text
    • 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_off0000b17b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB17B 10604 bytes
SHA-256: 5cc04a62c153cfcb7c1988b7534e1a7182b653a8426ede6a27ddc01de4eb3348
font_01_sfnt_off0000c9a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9A6 14388 bytes
SHA-256: 6d2b3f328183a751fa49902df4cddb793975240727a812f7e12075c5d8685586
font_02_sfnt_off0000ed75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED75 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1