Malicious PDF — malware analysis report

Static analysis result for SHA-256 da09bf5d2cfb384d…

MALICIOUS

PDF

68.8 KB Created: 2021-09-26 05:59:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 04b0f75914e7af7cad9a67ca72b97e70 SHA-1: 68d618e878f1674d1ae94effb09e702f2eb38b7b SHA-256: da09bf5d2cfb384de3fe3c22a7e0601b714b1ee103b0f7e1dd285a56b21da122
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and is flagged as a phishing lure by multiple heuristics, including ClamAV. The document's structure suggests it's designed to trick users into clicking a link, likely leading to a malicious download or further phishing attempt. The embedded JavaScript is likely used to facilitate the redirection or exploit vulnerabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 1 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://mimpiindah88.com/contents/files/kinulelatazumuvubu.pdf In PDF document text
    • https://binarbaidfabrication.com/public_html/userfiles/file/tofolazadujuba.pdfIn PDF document text
    • http://uran-berlin.com/userfiles/file/13816350751.pdfIn PDF document text
    • http://www.moyekolodin.com/files/kujunatawinaxizewizopij.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/20938820700.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/noxinugeseluzoje.pdfIn PDF document text
    • https://patriot.ch/wp-content/plugins/super-forms/uploads/php/files/6bjehiq8c33kfm72pqhqqa2ti3/74699350453.pdfIn PDF document text
    • https://fontan-montag.ru/img/upload/56098328585.pdfIn PDF document text
    • http://taxiluzern.ch/khurasan/userfiles/files/puwinixepituvaxesiregi.pdfIn PDF document text
    • https://webaruhaz.codefon.hu/js/ckfinder/userfiles/files/46675746263.pdfIn PDF document text
    • http://zimmerei-possert.at/masobavolaludajo.pdfIn PDF document text
    • http://adas-muko.pl/photo/file/33797259451.pdfIn PDF document text
    • http://hysansam.com/fckeditor/userfiles/image/55374806969.pdfIn PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/tanilabuzi.pdfIn PDF document text
    • https://fceresources.com/ckfinder/userfiles/files/petugijunemidufef.pdfIn PDF document text
    • https://www.yoursurveysurveyors.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16148d7e2ed6fd---jamututepodatemev.pdfIn PDF document text
    • https://aksukartela.com/images_upload/files/52200045520.pdfIn PDF document text
    • https://ka-base.no/images_content/file/43326178099.pdfIn PDF document text
    • http://asr-net.ru/uploads/files/85234467369.pdfIn PDF document text
    • http://naitikfashions.com/ckfinder/userfiles/files/29327931712.pdfIn PDF document text
    • https://xyoaa.org/sites/default/files/files/97675860271.pdfIn PDF document text
    • http://christmaslandint.com/userfiles/54974620343.pdfIn PDF document text
    • https://bisleriwheel.genefied.co/ckfinder/userfiles/files/gekotutipijigosixusel.pdfIn PDF document text
    • http://airelimpio.mx/img/editor/file/86939826677.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=becoming+supernatural+free+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_off0000b013.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB013 14492 bytes
SHA-256: c26166ff7bfdd337f5cf99f34d502b0c1d7b3925f6481f8ac907e0340eccf91c
font_01_sfnt_off0000d3ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3EC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ec03.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC03 11116 bytes
SHA-256: 36c3f351d92a18f3a5908ca1575e3897b0fe822376e56849f2f154bcdee9a901