Malicious PDF — malware analysis report

Static analysis result for SHA-256 de0f32987fc8ebfb…

MALICIOUS

PDF

75.9 KB Created: 2021-10-01 14:51:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 9b11ef0eb634e3830d127613b0f69e45 SHA-1: e0c73e252628d6af27c31df4b8b72cd60c14633a SHA-256: de0f32987fc8ebfb8a056ac3c0574f538091d8aaf15835b082a27ece80fb581c
146 Risk Score

Malware Insights

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

The sample is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. Multiple heuristics point to the document acting as a link farm, directing users to various external URLs, including one with a raw IP address. The document body is heavily obfuscated and unreadable, providing no further context.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://machinegroup.ru/img/outer/files/52794645106.pdf In PDF document text
    • http://www.web-globus.de/ckfinder/userfiles/files/87794667514.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/16141d5ab4c90a---3662075297.pdfIn PDF document text
    • http://pttaccounting.com/userfiles/files/18690090645.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/8095197637.pdfIn PDF document text
    • http://178.62.148.222:300/ckeditor/ckfinder/userfiles/files/30713245595.pdfPDF link annotation
    • http://fitviewer.biz/files/file/49076818019.pdfIn PDF document text
    • https://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/geguf.pdfIn PDF document text
    • https://iphonerepairservice.nl/app/webroot/files/userfiles/files/guwedafutuniwimem.pdfIn PDF document text
    • http://helix.chuing.net/mai/ckfile/files/72554084683.pdfIn PDF document text
    • https://mimpidia2.com/contents/files/14526702968.pdfIn PDF document text
    • http://e-restauracion.com/app/webroot/files/uploads/files/kowopufuguzizerunav.pdfIn PDF document text
    • https://www.hotel-restaurant-plainfaing.fr/ckfinder/userfiles/files/jowapadebazik.pdfIn PDF document text
    • https://wildarium.com/ckfinder/userfiles/files/zagejufikarasekiweda.pdfIn PDF document text
    • https://volgogradexpo.ru/ckfinder/userfiles/files/desupabuxed.pdfIn PDF document text
    • https://mgc.to/sites/web/upload/files/14522218653.pdfIn PDF document text
    • http://www.masozilina.sk/ckfinder/userfiles/files/37532761779.pdfIn PDF document text
    • http://kedehg.com/ckfinder/userfiles/files/32123363523.pdfIn PDF document text
    • http://rebeccafantarchitetto.it/userfiles/files/7308691257.pdfIn PDF document text
    • https://pro-biomed.com/admin/userfiles/file/26362300290.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/17002067153.pdfIn PDF document text
    • https://unitedfightalliance.jordanadams.com/ckfinder/userfiles/files/52966408710.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/161492897bf2db---30419698417.pdfIn PDF document text
    • https://ceylanotel.com/firma/files/29970348087.pdfIn PDF document text
    • https://swaarm.de/app/webroot/upload/files/rinusimatovokanexoga.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=el+problema+del+hombre+joseph+gevaert+pdfPDF 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_off0000bfef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBFEF 18764 bytes
SHA-256: 9abcd510610ecc94c2b7b5c60eb6c95702a10de13b0783cb7038618fce3bd9e6
font_01_sfnt_off0000f049.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF049 11068 bytes
SHA-256: 99dc4b124ae973bb49d61681eec93f7e209cf71d4ea975723ec0eb949cbf0609
font_02_sfnt_off000109b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109B1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1