Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe3da713338c2e3f…

MALICIOUS

PDF

81.5 KB Created: 2021-09-18 05:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fb4d138930def8953ec8857540cbddd5 SHA-1: a204bb5de8e114e6357746b2f0eaa9c66f844e57 SHA-256: fe3da713338c2e3f005c06e201713ae8ccd384472e11b5e3ca7d7f24572e53e9
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for executing malicious code. The file also exhibits characteristics of a link farm, with numerous external URIs pointing to potentially compromised websites or disposable hosting. These elements, combined with high ML and ClamAV detection scores, strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://synerhu.ru/uplcv?utm_term=how+do+i+turn+off+chrome+notifications+on+my+phone PDF link annotation
    • http://doctour.hu/uploads/ckfinder/userfiles/files/50099596904.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/4377071f166e6bf5a629d20944c6ee2c/kawobipujer.pdfIn PDF document text
    • http://ballarioarchitetti.eu/userfiles/files/gutobarupadez.pdfIn PDF document text
    • http://tnslib.net/userfiles/files/78719676113.pdfIn PDF document text
    • https://tnmkor.com/FileData/ckfinder/files/20210910_F263CD2402A4025C.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4967af546---19822518582.pdfIn PDF document text
    • http://feuerwehr-mittenwalde.de/mediathek/files/53123943754.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/16583557957.pdfIn PDF document text
    • https://graphicart.ro/fckfiles/file/tidivefofadowozolesif.pdfIn PDF document text
    • http://rama-sp.com/rama/webroot/js/ckfinder/userfiles/files/76270192896.pdfIn PDF document text
    • http://rebornfair.com/FileData/ckfinder/files/20210913_C24FD5EEE0BAC98C.pdfIn PDF document text
    • http://smolensk-bakaleya.ru/userfiles/file/zolamufoxoxe.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/16139dac84e945---tolobuwidawariwesodaz.pdfIn PDF document text
    • http://ls12368.com/userfiles/file/36147668097.pdfIn PDF document text
    • https://tattica.byespresso.com/app/webroot/files/upload/files/fulovamikumumi.pdfIn PDF document text
    • http://astmasme.com/userData/board/file/tijososa.pdfIn PDF document text
    • https://srccaa.bdbabymart.com/app/webroot/ckfinder/userfiles/files/39548871307.pdfIn PDF document text
    • http://sfalojistik.com/userfiles/file/24482413407.pdfIn PDF document text
    • http://m-s-g.ru/userfiles/files/3637021134.pdfIn PDF document text
    • http://daltan.hu/userfiles/file/58035570799.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613ef9eb0eba6---fenojikovinajavawo.pdfIn PDF document text
    • https://ceiling.holcom.vn/webroot/img/files/85748298029.pdfIn PDF document text
    • http://hrudolf.com/userfiles/78292333901.pdfIn PDF document text
    • http://esen-life.com/userfiles/file/86186320600.pdfIn PDF document text
    • http://orosweb.hu/ckfinder/userfiles/files/xovivana.pdfIn PDF document text
    • http://zhymwz.com/upfile/file/ralijosexomupo.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_off0000d89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89B 11132 bytes
SHA-256: 6496c95473aff405376b116523cec214dc4b852005325ca80383c09a39112721
font_01_sfnt_off0000f27c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF27C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010a8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8E 17528 bytes
SHA-256: f84a444b3993f9f50ca64314d21c6448b22f88b0cf1ce2adf815c2c6e3a8802b

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