Malicious PDF — malware analysis report

Static analysis result for SHA-256 94ef9963dbfa3971…

MALICIOUS

PDF

80.3 KB Created: 2021-09-15 10:52:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 1d7d8c0465aa38ef6a5172d83c4ffdf8 SHA-1: 542eaec5e32fa3ec0a33c29ae83af55c16fcec58 SHA-256: 94ef9963dbfa397101288fe5409af1486649d9de6b8f71c4893eed29815fa703
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a phishing or trojan threat. It contains a large number of URLs, many pointing to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farms indicates an attempt to lead users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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.
  • 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=how+to+get+icloud+data+on+android PDF link annotation
    • http://grgct.com/ckfinder/userfiles/files/desosikide.pdfIn PDF document text
    • http://hamishehbaharcarpet.com/My_Project/Hamishe_bahar/ahar_img/files/85201335432.pdfIn PDF document text
    • https://wct.goldcrownresort.com/magazine_files/files/24837405733.pdfIn PDF document text
    • https://massagetheory.ca/wp-content/plugins/super-forms/uploads/php/files/4cf0c11c5eae3f4725e68b25d1ed8a6b/redamururobozufu.pdfIn PDF document text
    • http://bennett-legal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/luxasazubefaletinin.pdfIn PDF document text
    • https://momentous-inst.com/uploads/image/files/batekurubi.pdfIn PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/16397267658.pdfIn PDF document text
    • https://pinkrali.com/calisma2/files/uploads/84867550212.pdfIn PDF document text
    • https://proff-doors.ru/wp-content/plugins/super-forms/uploads/php/files/065d00c1c5f1f5c918c85b67ae18ff6d/bixekinalakuwomagom.pdfIn PDF document text
    • https://makiriaszto.hu/ckfinder/userfiles/files/lavuvikod.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/uhkpa7ot69vrb2v9svdn3hvnm4/baniguwiwumako.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/90436584125.pdfIn PDF document text
    • http://ewhamd.net/upFiles/ckeditor/files/nefolaseze.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/7906a208dede144b154b390b44c99093/63449701625.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/buzatala.pdfIn PDF document text
    • http://t-p-fortune.com/userfiles/file/77729307840.pdfIn PDF document text
    • https://berbagiangka.com/contents/files/11212709189.pdfIn PDF document text
    • http://moscow-vernisage.com/files/files/18477673089.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/161300278e28b0---daxijajedimitob.pdfIn PDF document text
    • https://faktxeber.ru/resimler/files/wobamiki.pdfIn PDF document text
    • https://tapuionoticias.com/ckfinder/files/57637472190.pdfIn PDF document text
    • https://pankajplast.com/ckfinder/userfiles/files/83130405949.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_off0000d6ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6AE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eec0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC0 17356 bytes
SHA-256: d2c9864e2661b9777253e237ca35eaf3a9886d1696f435814bd7a7ca85183aef
font_02_sfnt_off00011b64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B64 10556 bytes
SHA-256: 6f214d6e86631de053db9fae350bf7092a9bb9a8bea95ee7e8f4bb6d3b4c5616