Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e2bab1c9436cdb8…

MALICIOUS

PDF

72.4 KB Created: 2021-09-25 03:52:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: bc93c5d0b29a938b31eb68d2f3ab5cd9 SHA-1: c4037634ac998147c5a19f0b9652bb57af8b6bce SHA-256: 7e2bab1c9436cdb8d761eae040465906e6fb5963c3138dce2cc3169daf0f968c
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of embedded JavaScript (T1059.007) suggests it may be used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://cructi.ru/uplcv?utm_term=android+weather+app+project+with+source+code PDF link annotation
    • http://elard-group.com/ckfinder/userfiles/files/gametamimexupazuxemikiki.pdfIn PDF document text
    • https://medbillings.us/lightspeedweb1/file/6525532607.pdfIn PDF document text
    • http://studiotecnicofrisoli.com/userfiles/files/filulutem.pdfIn PDF document text
    • http://pretaporter-pegah.com/userfiles/file/99253123739.pdfIn PDF document text
    • http://pvvc.cz/files/12118057275.pdfIn PDF document text
    • http://sjhtractor.com/d/files/tidugutoboposepariri.pdfIn PDF document text
    • https://emotionalgift.com/ckfinder/userfiles/files/dexiwutefarojol.pdfIn PDF document text
    • https://bauarch.bg/files/46318998238.pdfIn PDF document text
    • http://foxadv.net/file/85647083300.pdfIn PDF document text
    • https://www.rath-catering.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613dee7542edf---tazebar.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/vagizubugi.pdfIn PDF document text
    • http://mestav.sk/uploaded_images/file/guwowativufabipajarejorad.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/d0631b4753d4cc87ff7f81a3a943a1a7/81234649589.pdfIn PDF document text
    • http://cukierniabrzezinski.pl/www/artizam/fck/file/kidupuwemavebi.pdfIn PDF document text
    • http://www.martiusstaden.org.br/js/ckfinder/userfiles/files/pojegil.pdfIn PDF document text
    • http://efuturesthai.com/uploads/files/zifuvejadabiwu.pdfIn PDF document text
    • https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1614a1c078ea65---25041521901.pdfIn PDF document text
    • http://rracc.com/file_media/file_image/file/wedubofikoge.pdfIn PDF document text
    • http://e-sportis.com/images/upload/56868746485.pdfIn PDF document text
    • http://magicfood-cn.com/files/20210910165926.pdfIn PDF document text
    • http://posicert.com/upload_fck/file/2021-9-22/20210922165033367229.pdfIn PDF document text
    • http://thementalhealthadvocates.org/files/userfiles/file/posokowafolu.pdfIn PDF document text
    • http://abimobiliare.pl/pliki/File/13282486452.pdfIn PDF document text
    • https://felicitareonline.ro/ckfinder/userfiles/files/jusuromofurenururexasegew.pdfIn PDF document text
    • http://pm-ural.com/uploads/files/zejozefitowororo.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_off0000b534.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB534 10864 bytes
SHA-256: f56e2c1710e7a67f4716952360d1f87b533a2d8b020e3bb3695cf691352e01c6
font_01_sfnt_off0000ce47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE47 17188 bytes
SHA-256: 1c8ffd95febc020a31933061c1211faba44f2bbacae7dcfe937998ee2e1d9da0
font_02_sfnt_off0000f97c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF97C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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