Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ce293f822617fe0…

MALICIOUS

PDF

106.5 KB Created: 2021-10-10 16:27:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: da0ca910c707c24c991bc2ff45253914 SHA-1: 95d5c1508613798b19ea2978d6050cc1f7c2380d SHA-256: 6ce293f822617fe0275fe68d64098f3126c5e5b4880c8bfc8c685f139ca54c1f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous embedded URLs, with one heuristic specifically identifying it as a link farm on disposable hosting. The presence of these links suggests an attempt to redirect users to malicious sites, likely for phishing or to download further malware. Although no scripts were explicitly extracted, the PDF structure itself is being leveraged for malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

Heuristics 5

  • 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.
  • 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://plenaseguroseprevidencia.com/fotosempresa/files/donokonitikigagum.pdf In PDF document text
    • http://myxroad.net/upload/userfiles/file///84707980000.pdfIn PDF document text
    • http://cablexconsulting.com/Upload/file/79788841085.pdfIn PDF document text
    • http://omnoiptv.com/outscapes/admin/ckeditor/uploads/ck/files/toponovaminajutufe.pdfIn PDF document text
    • http://investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/sakanokekogi.pdfIn PDF document text
    • https://panoramamall.bg/ckeditor/ckfinder/userfiles/files/84212434924.pdfIn PDF document text
    • http://bosch-elektronarzedzia.pl/catalog/file/zedofevo.pdfIn PDF document text
    • https://barrier.exma.cl/ckfinder/userfiles/files/52171265838.pdfIn PDF document text
    • http://potlista.com/file/files/jatawulufatagitazo.pdfIn PDF document text
    • https://armour-technoz-ca.otzol.net/ckfinder/userfiles/files/4975317392.pdfIn PDF document text
    • https://hankilfood.com/upfile/files/pajapuga.pdfIn PDF document text
    • http://fogathajtohirek.hu/fckfiles/file/gemawiranalejajor.pdfIn PDF document text
    • https://digiconelectronics.com/media/bevapufojunag.pdfIn PDF document text
    • http://dulichtantai.com/files/uploaded/files/wolumam.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/16150f2f85d5c4---85164575438.pdfIn PDF document text
    • https://svingenieria.cl/userfiles/file/vubibaluguluzudajolexus.pdfIn PDF document text
    • https://artistprasanna.com/userfiles/file/40694628896.pdfIn PDF document text
    • http://lex.tj/img/file/88105930628.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1614932117acab---17446787164.pdfIn PDF document text
    • https://groupunsur1.com/contents/files/38593906925.pdfIn PDF document text
    • http://movesearchesuk.com/userfiles/file/davuv.pdfIn PDF document text
    • http://munnarteabungalows.com/userfiles/file/fedelimil.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/14239395113.pdfIn PDF document text
    • http://gyogytornasziget.hu/uploads/files/11266277445.pdfIn PDF document text
    • http://parafiasadkowice.pl/pliki/zibetolafizabirawika.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=louise+hay+positive+affirmations+pdf+free+downloadPDF 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_off00013482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13482 20408 bytes
SHA-256: 89f8375a2c1ef404bbadb572aba3321b41328aaef4d861fd4e6a42c512b73914
font_01_sfnt_off000169d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x169D4 11084 bytes
SHA-256: 2f0a0c1f2dae515a374ef78046758fe257a304f66f84f03db6c74778f0d107ef
font_02_sfnt_off0001839a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1839A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1