Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c17896cef48c1c2…

MALICIOUS

PDF

85.5 KB Created: 2021-09-20 00:16:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 501d37eeeb0a11a5e8ec138491907386 SHA-1: 93ee43a4257b0505808b3d6eb126f5d5bbaeeb9d SHA-256: 2c17896cef48c1c2306c33046ef932b9df80bf1c4deac07ad0d917f0a291c0e7
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, indicating it is designed to redirect users to potentially malicious websites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript points to its use in exploiting PDF vulnerabilities or delivering malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • 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://laborke.ru/uplcv?utm_term=12+rules+pdf PDF link annotation
    • http://gdlianyu.com/uploadfiles/file/nizowegaxepakojalizifuxo.pdfIn PDF document text
    • http://nanchang.chinatupai.com/web/js/ckfinder/userfiles/files/44086612842.pdfIn PDF document text
    • https://apc-algercentre.dz/ckfinder/userfiles/files/dunijobamogunolasibow.pdfIn PDF document text
    • http://mentor-tutor.com/newGroserLikeProject/uploads/files/robakis.pdfIn PDF document text
    • http://racecross.com/upload/edito_fckeditor/file/7291577218.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/jekubomuxadokugozifef.pdfIn PDF document text
    • http://aceonlinementors.com/userfiles/file/91993401335.pdfIn PDF document text
    • http://lasantitosrestaurant.com/userfiles/file/90764308148.pdfIn PDF document text
    • http://seyrimerdin.com/userfiles/file/58516007472.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f8e890a69d---vamutimoxojuxowuxuke.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/gajakit.pdfIn PDF document text
    • http://arenda-v-novosibirske.ru/ckfinder/userfiles/files/85167930837.pdfIn PDF document text
    • http://elskup.pl/images/assets/file/32401489882.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/file/remasapesesujajovex.pdfIn PDF document text
    • https://coverline.ro/userfiles/file/55166746751.pdfIn PDF document text
    • http://ccsup.co.th/uploads/ckfinder/files/51587595637.pdfIn PDF document text
    • http://goddesshair.net/upload/users/files/49993842081.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/bagenuzu.pdfIn PDF document text
    • http://fueandhair.com/userfiles/files/90070283209.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16132dddb9b6ae---47695351120.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/18637119972.pdfIn PDF document text
    • http://lamekatus.com/uploads/ckeditor/files/4789806861.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_off0000e9ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9EE 18212 bytes
SHA-256: 71156c36faaf23053f3e7fbc7a6927d123d815633284a54796a8b0b2a6fc5325
font_01_sfnt_off000119bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119BC 10092 bytes
SHA-256: 456d4d1d017cbe3aaa927360c400daf6f87b01aed9896a1ccc594c507cac1ff6
font_02_sfnt_off00013069.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13069 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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