Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ed1702054a033ba…

MALICIOUS

PDF

79.0 KB Created: 2021-09-19 03:44:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9f0ff402e4e0f6419aca88bf3d24e5d6 SHA-1: e3df6d8c67a88b3871c0a8e1b2b0d964f65bdd8f SHA-256: 7ed1702054a033ba6f94621a78fadb85552b5300d75370756c8c53c23c8a7f3d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier assigned a high probability of maliciousness. The PDF contains numerous embedded URLs, many of which point to external, potentially malicious sites, indicating a phishing or malware distribution attempt. The presence of PDF_SEO_DISPOSABLE_LINK_FARM heuristic further suggests a link farm designed to obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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://llbyggodesign.se/UserFiles/files/69516076765.pdf In PDF document text
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/6a9ae1599f157b443e2917d6624bd29d/81572992638.pdfIn PDF document text
    • https://laser123.com/geektic/files/biduti.pdfIn PDF document text
    • http://ride-on-earth.com/images/blog/file/subasawonopilafag.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/pipusikiboxetagajitemamu.pdfIn PDF document text
    • http://raczpalinka.hu/userfiles/file/resosoro.pdfIn PDF document text
    • https://ubitanduk.com/contents/files/firetamekukapixi.pdfIn PDF document text
    • http://elmbbq.com/uploads/files/musofoluginuron.pdfIn PDF document text
    • https://sskundal.com/userfiles/file/rebomivoke.pdfIn PDF document text
    • http://terezszilvia.com/images/uploaded/file/dizowaxabogojewunasu.pdfIn PDF document text
    • http://cmtl.in/uploads/userfiles/file/file/moxasepuzew.pdfIn PDF document text
    • http://www.derbysignandgraphics.com/uploads/file/87103024677.pdfIn PDF document text
    • https://icon-studios.com/userfiles/file/fatuxilufibe.pdfIn PDF document text
    • https://yukkumpulgroup2.com/contents/files/gilisalikekijorod.pdfIn PDF document text
    • https://kingcom.edesign.fr/gr33/web/uploads/assets/file/lurotogurafuwad.pdfIn PDF document text
    • https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/16145bdb9673be---watamulibikabosited.pdfIn PDF document text
    • http://fra2ange.it/userfiles/files/zapokidobejudolusobe.pdfIn PDF document text
    • http://apart1day.ru/file/setife.pdfIn PDF document text
    • http://dangkydoanhnghiep.org/hinhanh_fckeditor/file/gisofija.pdfIn PDF document text
    • http://relaxzenter.com/uploads/files/jonebovojarorug.pdfIn PDF document text
    • https://vietucmould.com/img-vietuc/files/11308342541.pdfIn PDF document text
    • https://lucky-erotic-massage-bucharest.ro/ckfinder/userfiles/files/52646293128.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/nopakibofogagalasasus.pdfIn PDF document text
    • http://citranco.com/users/files/dekiju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=alchemist+code+mod+apkPDF 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_off0000cf62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF62 10648 bytes
SHA-256: e26b3633e6a2f7a0a4d88e50bc6e37b79d0e66f75cae343b5121a59f7b93ad40
font_01_sfnt_off0000e7d0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7D0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ffe2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFE2 17852 bytes
SHA-256: 133b20934fd39ec6d6652c9bc4da1ab8fe5972507fc992a5eae111e645ea4dda

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