Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2708ba346beaac3…

MALICIOUS

PDF

77.8 KB Created: 2021-09-24 10:53:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 83fde98dba340fab11ffbea90bb6b545 SHA-1: 319764fa7f1af64e5c1fcdf40accd4881d6a9eaa SHA-256: d2708ba346beaac3caac879caeb92b922b0e41c7523e1d4ac7b94bda68608502
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, indicating an attempt to execute malicious code. It also features numerous external URIs, many of which point to disposable domains and are likely used for phishing or to host further malicious content. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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
  • 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://panoramabyty.cz/content/sipajigimugojot.pdf In PDF document text
    • http://autosoftware.company/autoresponders_images/files/bovopujeku.pdfIn PDF document text
    • https://office-agglo-larochelle.fr/userfiles/file/rekitu.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/85187078186.pdfIn PDF document text
    • https://luatsuavina.com/userfiles/file/zinudinek.pdfIn PDF document text
    • http://vansuloi.com/uploads/userfiles/file/89477203712.pdfIn PDF document text
    • http://dzstock.com/Upfiles/file/82024612049.pdfIn PDF document text
    • http://luckysim.com/userfiles/file/gebepiruzobonofamesonut.pdfIn PDF document text
    • http://myucpb.com/userfiles/file/vutud.pdfIn PDF document text
    • http://se-ty.ru/uploads/userfiles/file/ledefutowabadokin.pdfIn PDF document text
    • https://phunhai.net/upload/files/36226793126.pdfIn PDF document text
    • https://istanbularicilikfestivali.com/upload/ckfinder/files/rewavogus.pdfIn PDF document text
    • http://zsdbiopharm.com/upload/files/xurafulilewu.pdfIn PDF document text
    • http://yuhuimachinery.com/d/files/43079428267.pdfIn PDF document text
    • http://espressobuilders.com/app/webroot/files/userfiles/files/35100062290.pdfIn PDF document text
    • http://pm-property.pl/userfiles/file/lasuxosunij.pdfIn PDF document text
    • https://www.soroptimist.be/oldsite/intranet/ckeditor/ckfinder/userfiles/images/files/69387880780.pdfIn PDF document text
    • https://camerabentrenet.camerabentre.vn/ckfinder/userfiles/files/99966306961.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/161470cd616c00---97605303107.pdfIn PDF document text
    • http://konferencii.org/js/ckfinder/userfiles/files/wuxogedatenometafuki.pdfIn PDF document text
    • https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/63e3d657cc9c3b1dc733d3476c634acf/kiwufulowikonini.pdfIn PDF document text
    • http://abbaorphancare.org/survey/userfiles/files/65222734273.pdfIn PDF document text
    • http://cn-biyoute.com/d/files/83723911144.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/72756286684.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/32973826013.pdfIn PDF document text
    • https://latework.cz/soubory/jegokinekezekojalafadiman.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=dream+league+soccer+ppssppPDF link annotation
    • 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_off0000cba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBA3 17604 bytes
SHA-256: 13c9f06d98e7574a123fcea78ebafb4b6e9a9d806d6e0fd3d07729317f89889e
font_01_sfnt_off0000f941.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF941 10524 bytes
SHA-256: e17052635c60f0580acee26e6c552de6754636db2c49eab83beededa9c24335b
font_02_sfnt_off00011140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11140 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1