Malicious PDF — malware analysis report

Static analysis result for SHA-256 154ea0421c3087fe…

MALICIOUS

PDF

89.2 KB Created: 2021-09-21 00:24:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1767e19e9bd2deb870c229dcc7c9895d SHA-1: c6f2b52017e52783ca60c99dcafbaeb523949386 SHA-256: 154ea0421c3087fe65eec5a87e39eabea7ffcd7cef11319ffd47d78468eba865
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and exhibits characteristics of a PDF link farm. It contains numerous embedded URLs pointing to various domains, many of which appear to be compromised or disposable hosting. The primary purpose seems to be directing users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://infrive.ru/uplcv?utm_term=can+you+see+how+many+times+someone+has+visited+your+instagram PDF link annotation
    • http://mackielaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/95876908797.pdfIn PDF document text
    • https://ctcitsupport.com/media/files/kudurodita.pdfIn PDF document text
    • http://studiospazioambiente.it/userfiles/files/59857243548.pdfIn PDF document text
    • http://ontis.sk/editor_uploads/system/files/58201638733.pdfIn PDF document text
    • http://alfatreyd-mebel.ru/archive/images/file/24100312008.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/cd4rgnc5unfi8kop8g51noq113/nunadevigafug.pdfIn PDF document text
    • http://sushifactoryazusa.com/uploads/files/sugotabaresuki.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/161308ec84f7b5---4559167847.pdfIn PDF document text
    • https://mimpishio.com/contents/files/mejomelijixubakuwemiraram.pdfIn PDF document text
    • http://mutamobilya.com/images_upload/files/52607797056.pdfIn PDF document text
    • http://bluestandard.pl/ckfinder/userfiles/files/vawamaxogusakasutemabewo.pdfIn PDF document text
    • https://maintogelonline2.bet/contents/files/89874245191.pdfIn PDF document text
    • https://jooli.ru/ckfinder/userfiles/files/31538956467.pdfIn PDF document text
    • https://ddnepal.com/assets/userfiles/files/movurofunelaxag.pdfIn PDF document text
    • http://xnucleus.com/members/member_images/files/sevikidasu.pdfIn PDF document text
    • https://markapin.com/calisma2/files/uploads/97788957067.pdfIn PDF document text
    • https://rodolphe-blanchet.fr/Rodolphe/fckeditor/file/99723465692.pdfIn PDF document text
    • http://195exim.com/datas/files/luwesoloduji.pdfIn PDF document text
    • http://antoniolescio.net/userfiles/files/93534864670.pdfIn PDF document text
    • https://yarsan.ru/wp-content/plugins/super-forms/uploads/php/files/7eb3030336aa2e471a9ca573f8ff7821/11528766009.pdfIn PDF document text
    • https://www.abrasco.org.br/ckfinder/userfiles/files/76498440044.pdfIn PDF document text
    • http://rintoyo.com/userfiles/file/10495571034.pdfIn PDF document text
    • http://prompol.com/media/file/63304953775.pdfIn PDF document text
    • https://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/d84c41c3be7f675d0eafd34e40ef085f/51153520822.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_off0000f841.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF841 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11053 17392 bytes
SHA-256: 3263fe36602149c2248135e71c7a508177df8bb8fb05d77501f73b7f9f053ed0
font_02_sfnt_off00013d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D5A 11044 bytes
SHA-256: 74cb17b94d0b7560d3bfa1ebb55bbb1be66b43615347ab72a3fda38ae2695cd6

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