Malicious PDF — malware analysis report

Static analysis result for SHA-256 005e8bd8e28d89b3…

MALICIOUS

PDF

86.1 KB Created: 2021-09-19 21:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7ec9c3ff65d06a4b7c0d2448411516a2 SHA-1: d608e92b421baebb628ba4827da695a2496aa35a SHA-256: 005e8bd8e28d89b3839dc050dc315888a4ad1be617bb39054dcb7a4d1e208e03
164 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, indicating a high likelihood of malicious intent. The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised websites or disposable hosting, suggesting it functions as a link farm. The embedded JavaScript likely facilitates the redirection to these malicious sites, which could be used for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 7

  • 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.
  • 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://garglob.ru/uplcv?utm_term=android+phone+surveillance+software PDF link annotation
    • https://parklanehotel.asia/userfiles/file/sawajisunavafilolu.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc6aff2f0a---7575977149.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/abdd07cf531e3b94c216da33cf454cde/57186614258.pdfIn PDF document text
    • http://bscartridge.com/pic/jajusuro.pdfIn PDF document text
    • http://stoewebdesign.no/userfiles/file/rekamujekajuz.pdfIn PDF document text
    • http://ever0036.com/assets/uploads/ckedit/files/20210905084258.pdfIn PDF document text
    • http://3m18.com/images/editor/files/zinimupobeniluk.pdfIn PDF document text
    • http://burragebrothers.net/demo/jolie/beta/userfiles/files/volowosanakago.pdfIn PDF document text
    • http://a9188.com/upload_files/art_files/files/20210915_100354.pdfIn PDF document text
    • http://www.performhabitat.fr/bundles/astadmin/js/ckfinder/userfiles/files/pulapajuruwegagigepuw.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/jojaz.pdfIn PDF document text
    • http://educaholistica.com/resources/img/imagesck/files/45518173637.pdfIn PDF document text
    • http://dakhoanhanai.com/images/files/dasaduj.pdfIn PDF document text
    • http://www.deco-interieure.com/userfiles/file/85088328610.pdfIn PDF document text
    • https://ijfbacknumber.com/editor_up/wazuxupelebananage.pdfIn PDF document text
    • https://quangcaowebsite.xemlaco.com/uploads/files/43715651703.pdfIn PDF document text
    • https://loyallcanada.com/editor_files/file/nidino.pdfIn PDF document text
    • http://desiaussies.com/ckeditor/uploads/files/77027356477.pdfIn PDF document text
    • https://confetti-seasons.ru/upload/files/50592584747.pdfIn PDF document text
    • http://grupomarsamo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614047bc7989c---powudarupataneronaviw.pdfIn PDF document text
    • https://ooo-kenk.ru/userfiles/file/nafunuminusosifuriseguni.pdfIn PDF document text
    • http://otevrel.eu/ckfinder/userfiles/files/36282854368.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16146a9fc7435f---5418657706.pdfIn PDF document text
    • https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145311db516c---zivutiminebesovib.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_off0000eace.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEACE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E0 17620 bytes
SHA-256: 1dfeaf00c7353ffe93c3bf692f53bb5dd61098a0f6368306346eeae516157784
font_02_sfnt_off00013101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13101 10952 bytes
SHA-256: 0f63e42e91a411d6cb0190ccf8b02c0f1bab8e5555e69c7995e9cfff92a67936

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