Malicious PDF — malware analysis report

Static analysis result for SHA-256 646ffb513117732f…

MALICIOUS

PDF

72.3 KB Created: 2021-09-25 09:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f3b76d303b6dd3d969d2c858088f4f09 SHA-1: d01e090b00e9fc71d8d367fb8652e96864848f68 SHA-256: 646ffb513117732f24ffe7d857b4aadf15e652d30277a1dedfa110a3eb34c718
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users. The PDF also hosts a large number of external links, many pointing to PDF files on various domains, indicating a potential link farm or phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9849

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
  • 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://saintarseny.ca/sites/saintarseny.ca/files/file/45602155824.pdf
    • http://halanmilk.com/upload/files/5381827501.pdf
    • http://zsdbiopharm.com/upload/files/lonemizozinesuzoru.pdf
    • https://insinkerator.us/images/uploaded/file/mujuxupojapozoxelajo.pdf
    • https://synersys.fr/contenu/file/46489392925.pdf
    • http://frickcontrols.com/uploads/files/jobolib.pdf
    • http://ekopaczka.pl/imgbrama/files/66781598519.pdf
    • http://xn----7sbndn5at.xn--p1ai/uploads/files/dafikemivukavukuf.pdf
    • https://sistemagestiondpr.com/userfiles/file/gugupipewofasatonukejipen.pdf
    • http://serenetour.com/image/upload/File/xutatixagupokujavid.pdf
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/e1ebf77acd38aedbc7fa74baabac4d86/dakixetikarefuzojeb.pdf
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/4n1vngohdm91li13kpjc6fce4gc6c583/dutunewibokok.pdf
    • http://www.dawnrotaryclub.tw/UserFiles/files/kaxorirekerabale.pdf
    • http://laibros.com/ckeditor/userfiles/files/39135296134.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/finonevorasev.pdf
    • http://ngocminhcnc.com/demo_thietbimay_24_7/upload/files/18552414918.pdf
    • http://youngshiny.com/userfiles/file/1631102826.pdf
    • http://tipkeo.com/js/ckfinder/userfiles/files/30862086579.pdf
    • https://www.esfa.bg/root/ckfinder/userfiles/files/28918183303.pdf
    • http://paitoonbox.com/userfiles/files/42216180799.pdf
    • https://thehouseproduction.net/file/75133995277.pdf
    • http://ihdbd.org/upload/files/76961572763.pdf
    • http://lamorenj.com/userfiles/files/jozanalujuwegor.pdf
    • https://transturist.ba/ckeditor/ckfinder/files/files/88512640173.pdf
    • http://hjhchem.com/upload/files/10201421623.pdf
    • http://krevue.cz/UserFiles/File/tizejuj.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=cod4+download+torrent
    • 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_off0000b328.bin
8e6d022e626efd82baa8945fad9f696a828b52a70f1bd0771f00fcf47e1fe5ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB328 18552 bytes
font_01_sfnt_off0000e343.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE343 16792 bytes
font_02_sfnt_off0000fb5a.bin
c7c131fb6341be81dca4027e321e73fb4b345c9af28e62420c00c33bcd09e1d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5A 10176 bytes

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