Malicious PDF — malware analysis report

Static analysis result for SHA-256 98c6c8172763b4b4…

MALICIOUS

PDF

70.1 KB Created: 2021-09-26 23:08:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 31327be6fbf8b4ed870b1b6a6855a46c SHA-1: ea3b3dcd7c3185b42aec3f9c593f8b25e6340bb8 SHA-256: 98c6c8172763b4b465cf47b1656e88c831003fc5fbf4987d9bd3eace99e96e18
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs that point to various domains, many of which are associated with link farms and compromised content management systems. These URLs are likely intended to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://irlanc.ru/uplcv?utm_term=parametri+configurazione+libero+su+android
    • http://jilienjrubin.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/47635487878.pdf
    • https://equipelec.fr/ckfinder/userfiles/files/39597453108.pdf
    • http://bidwoodmachine.com/d/files/nejag.pdf
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/161338a5c9f106---jetalojarev.pdf
    • http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/495442a67a26752bec09f32125dcddcf/tapiketotupow.pdf
    • http://webs123.com/userfiles/file/gorogesepupupudejuz.pdf
    • http://beiwendq.com/userfiles/file/81993019815.pdf
    • https://4cmedica.com/ficheiros_upload/file/pigilafiwabe.pdf
    • http://appartementslisa.it/an3_Uploads/file/fetivaxoberoba.pdf
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161469d3242686---48592018785.pdf
    • http://bscartridge.com/pic/9090116006.pdf
    • http://rlponder.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/24946198425.pdf
    • https://szemvidito.hu/sfwkr/feltoltesek/Images/Image/defefi.pdf
    • http://johnmarzillier.com/ckfinder/userfiles/files/muluxi.pdf
    • https://balticstroy.com/uploads/files/38044801611.pdf
    • http://kk-gorenjska.si/uporabnik/file/xifowomubujo.pdf
    • https://pernambucoimortal.com/imagens/files/25649191503.pdf
    • https://hanakspotrebice.cz/eshop/ckfinder/userfiles/files/36259071699.pdf
    • http://ville-dammarie.com/ckfinder/userfiles/files/44168565662.pdf
    • https://asiastudy.in/ckfinder/userfiles/files/84372405749.pdf
    • http://smm-mm.com/uploads/news_file/20255954677.pdf
    • http://somkuthyoptika.hu/editor_up/11930590455.pdf
    • http://greenflameenergy.com/userfiles/file/94473378886.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000af9c.bin
d89630010c43771373bdad869e2147331e0945ba31fd7f8f2eb1de4f238f1ce4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF9C 11120 bytes
font_01_sfnt_off0000c961.bin
0a4ac132b60c5522d3ce0286b0c72433624c1e2e4d3f281d59c262aaaf5773df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC961 16296 bytes
font_02_sfnt_off0000f29c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF29C 16792 bytes

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