Malicious PDF — malware analysis report

Static analysis result for SHA-256 6aeb47fe92b17f11…

MALICIOUS

PDF

69.6 KB Created: 2021-09-26 06:49:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 781dff500116f83b4a7b4a3bca1c2823 SHA-1: 891abd0f6bbb32f891d1cca1d515c34cffefe6df SHA-256: 6aeb47fe92b17f1117433a836ebf4ecbea04388c3d02e64527a08b8b6315bd3b
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to other PDF files hosted on various domains, suggesting a link farm or content distribution network. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic indicates a high likelihood of malicious intent related to SEO manipulation or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 5

  • 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.
  • 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://webaprint.be/img/file/24167636937.pdf In PDF document text
    • http://www.alfapilates.pl/upload/file/77867115623.pdfIn PDF document text
    • https://sibiucuratenie.ro/fckeditor/userfiles/file/66963219485.pdfIn PDF document text
    • https://sporyolu.com/resimler/files/93856256447.pdfIn PDF document text
    • http://ahknchem.com/upload/files/10407328793.pdfIn PDF document text
    • https://101doctor.com/uploads/ckfiles/files/614e2354a9f59.pdfIn PDF document text
    • http://aotwresort.info/ckfinder/userfiles/files/lesodavozebijegotavuvom.pdfIn PDF document text
    • https://dtd.com.pk/ckfinder/userfiles/files/45883153854.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/64594794697.pdfIn PDF document text
    • https://www.prieur-equipement.com/ckfinder/userfiles/files/wimariforafefonu.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/37107142215.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b0d5be48f3---balopedelor.pdfIn PDF document text
    • https://299-45.com/CKEdit/upload/files/33968168133.pdfIn PDF document text
    • http://lahma.pl/_u/userfiles/file/45989113993.pdfIn PDF document text
    • http://sushiosushi.com/uploads/files/lozut.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/wiziroxi.pdfIn PDF document text
    • https://baoholaodong24.com/userfiles/file/lezunexuxesewenon.pdfIn PDF document text
    • http://reklamavysocina.cz/UserFiles/File/30643795375.pdfIn PDF document text
    • https://gitimohammadilakhimpur.org/ckfinder/userfiles/files/penikilod.pdfIn PDF document text
    • http://mansiya.com/uploadfile/files/37891631524.pdfIn PDF document text
    • https://indikino.com/ckfinder/userfiles/files/zufolijerojifur.pdfIn PDF document text
    • http://fitviewer.biz/files/file/ralerube.pdfIn PDF document text
    • http://jualumnitoronto.com/editor/uploadfiles/vizanafamimozipupusivefa.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/44163156834.pdfIn PDF document text
    • http://fuhua.tumujike.com/assets/upload/files/202109080125239820.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=4movierulz+mx+download+movierulz+appPDF 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_off0000b045.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB045 10684 bytes
SHA-256: d6e2047faf4f26d55b5cadfccd59e9cddc6709fd27b510a25d75ab3313bcd82c
font_01_sfnt_off0000c8bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8BF 15736 bytes
SHA-256: 70bcd969eb552c5b60cb93d3e3ea43264a6527683649de6bc9233ad512245269
font_02_sfnt_off0000f0c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0C2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1