Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbd56316b56fe0b0…

MALICIOUS

PDF

90.0 KB Created: 2021-09-20 05:31:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 6ee3a196d700b47d6df6b83a62fcbfd8 SHA-1: 72bb2a7ac367bb52479e94adf8f68d39437d7cdb SHA-256: bbd56316b56fe0b08a10e8d6f54ca9429d242d0de48ad202d42c8d8a8891b599
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF file flagged as malicious by ClamAV and an ML classifier. It contains embedded JavaScript, which is a common technique for executing malicious code within PDFs. The document also features numerous external URIs, many of which point to potentially compromised or malicious domains, suggesting an attempt to lure users to external resources. The presence of embedded JavaScript and multiple external links indicates a likely phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9935

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 http://fortlauderdalelimorental.net/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed6e198b13---58445477257.pdf In PDF document text
    • http://deltools.com/userfiles/file/75823803174.pdfIn PDF document text
    • http://presssimayeshahr.ir/pic/file/solarukurudowez.pdfIn PDF document text
    • https://baigiangtoanhoc.com/upload/files/suwejabepizuzo.pdfIn PDF document text
    • http://playitdirect.ca/ckfinder/uploadfiles/files/gesileberamenepes.pdfIn PDF document text
    • http://naturallabs.fr/userfiles/file/samomagurimasupesiri.pdfIn PDF document text
    • http://pro-customer.de/userfiles/file/57754783533.pdfIn PDF document text
    • http://studiotecnicomartani.eu/userfiles/files/saxerudaxifagiwedejov.pdfIn PDF document text
    • http://soluzionebenessere.eu/userfiles/files/riguman.pdfIn PDF document text
    • https://toliveinchristjesus.ceosale.catholic.edu.au/application/third_party/ckfinder/userfiles/files/luvedawin.pdfIn PDF document text
    • https://atavio.ru/files/file/lupasuxemapadilijasetu.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/2a28c7299a37489c424499249bb93f34/ponopiligokurokikira.pdfIn PDF document text
    • https://riosemarescentrodemergulho.com/ckfinder/files/40880741792.pdfIn PDF document text
    • http://www.laterveer-biesenbeek.nl/ckfinder/userfiles/files/dodazezidifurefefawubopez.pdfIn PDF document text
    • http://maydemtienvn.com/upload/files/54310836269.pdfIn PDF document text
    • http://hangtatmj.com/userfiles/86391441418.pdfIn PDF document text
    • http://german-ex.com/images/blog/file/54306561434.pdfIn PDF document text
    • http://sk-massimo.com/js/upload/files/duwelupefuzarabuzovu.pdfIn PDF document text
    • https://www.shamshabaddiocese.org/files/js/ckfinder/userfiles/files/12907885289.pdfIn PDF document text
    • http://ylpqzl.com/ckfinder/userfiles/files/jatuxunaxigudimotob.pdfIn PDF document text
    • http://piotrkowska77.pl/zdjeciafile/gekepanup.pdfIn PDF document text
    • http://shahgrp.com/uploads/zozidobufasi.pdfIn PDF document text
    • http://pomelieagency.com/userfiles/files/duxusoletotidof.pdfIn PDF document text
    • http://panyuchen.com/ckfinder/userfiles/site_eachfun_com/files/28043928263.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=dragon+ball+super+season+5+full+episodesPDF 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_off0000fae5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE5 10952 bytes
SHA-256: f171f5d72a2837d83defc9d8e4ff934055b9100330c6f49ba4bb6c99b8eb2b0b
font_01_sfnt_off000113f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113F2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C04 17992 bytes
SHA-256: 695dad6e2b47a3f92b3427d8fce5dc8f630273389825d0006cd4ec12c1839586