Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a1caa1cdd4768e3…

MALICIOUS

PDF

68.6 KB Created: 2021-09-24 21:34:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 0f9605cc3284652bbeaf5a03b47b7086 SHA-1: 52a49147d5e90df8e0b5827c331cda34cd3d52cd SHA-256: 6a1caa1cdd4768e3cd71cb93cebaa1beef2ea06e410f54b1a8bc78a90bcc30f8
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript indicates an attempt to execute code within the PDF viewer, likely to facilitate further exploitation or download additional payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://allytemp.ru/uplcv?utm_term=kumkum+bhagya+25+december+2020+full+episode PDF link annotation
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/7a975omi1h84efu28pdssra5rm/mutazewumelarazifajuxi.pdfIn PDF document text
    • https://yakin-surewin.com/media/file/ratek.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/zimunewupirisajurorug.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/25040037456.pdfIn PDF document text
    • https://traffictkt.com/viking1/uploads/files/bikazibanewutawolexudi.pdfIn PDF document text
    • https://needletherapy.eu/upload/file/55251876558.pdfIn PDF document text
    • http://image.dlib.vn/libedu/news/bvu/20210920/file/zuwit.pdfIn PDF document text
    • https://inwestorfinanse.pl/userfiles/file/gifapevikiwatiduweve.pdfIn PDF document text
    • https://manualismedicina.hu/fileok/file/wasivuletosow.pdfIn PDF document text
    • http://seteo-dechets.com/images/file/ravopasununene.pdfIn PDF document text
    • http://machi-tomo.xyz/js/ckfinder/userfiles/files/demaxojukedija.pdfIn PDF document text
    • http://vucert.vn/uploads/files/xulivexixob.pdfIn PDF document text
    • http://dongduong.net/Images_upload/files/zevawifedarijegavoj.pdfIn PDF document text
    • https://butzbacher.turnpoint.jo/app/webroot/upload/files/laweb.pdfIn PDF document text
    • http://yanarfabrics.com/firma/files/52848695857.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ab1b7b8553---fofoxifukexe.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/2528034462.pdfIn PDF document text
    • https://www.alliance-educationsexuelle.ch/ck/ckfinder/userfiles/files/meguwo.pdfIn PDF document text
    • https://gabconstruction.com/ckfinder/userfiles/files/72555242513.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/coee2jfls22e53d19aclthjj02/77514868132.pdfIn PDF document text
    • https://szallas-karpatalja.net/upload/81486440565.pdfIn PDF document text
    • https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/16140ac3831cbf---geperatisojavosojuj.pdfIn PDF document text
    • https://puntodeplacer.com/userfiles/file/66209426580.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_off0000ad97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAD97 11680 bytes
SHA-256: c3e90c6b0aa9b6c9816d75ac778cdd6b6cc23ceabe80410f22bca0e775d193bb
font_01_sfnt_off0000c908.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC908 14308 bytes
SHA-256: 62a1b568925718d71a68c3e416604fe3e15010ec91bd930e7b67a3485481ffae
font_02_sfnt_off0000ecc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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