Malicious PDF — malware analysis report

Static analysis result for SHA-256 32904469c8f56088…

MALICIOUS

PDF

83.0 KB Created: 2021-09-01 21:23:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: b1fdb3ed543b73c96c16c48787c81f2c SHA-1: 6c7eee49a99b05b7f02c170f72aa9a7398e85aca SHA-256: 32904469c8f5608858e5a493610a67347caff8f510c2c775a98f17245723ea03
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of links pointing to various websites, many of which are hosted on compromised or disposable domains. This structure is indicative of a link farm, often used to distribute phishing content or malware. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or trojan distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://uci.ir/userfiles/file/vabikedemaxibetifu.pdf In PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160729907cddac---17084236271.pdfIn PDF document text
    • http://dongzzang.com/userfiles/file///47547294313.pdfIn PDF document text
    • https://magicdiscoradio.hu/userfiles/file/7971644112.pdfIn PDF document text
    • https://gyn-koe70.de/obrazky/file/rebipeb.pdfIn PDF document text
    • http://alphabodysupplements.com/newerac2c/userfiles/file/rixasajirukoboduxizane.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/a461f7a9df2ba890a6643d5926bf9d04/59947350465.pdfIn PDF document text
    • https://zippy-inc.com/app/webroot/userfiles/files/78614639527.pdfIn PDF document text
    • https://cuacuonbentre.com/upload/files/55964385393.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/fac9952cb226efc7b93f838b62be4968/kosoxez.pdfIn PDF document text
    • http://0-50.ru/userfiles/file/12973252436.pdfIn PDF document text
    • https://familienbilstrup.dk/userfiles/file/12341061343.pdfIn PDF document text
    • https://china-glass-mosaic.com/userfiles/files/20210606_194647.pdfIn PDF document text
    • http://minhvuongthuphap.com/upload/ck/files/liwajum.pdfIn PDF document text
    • http://fisioterapiasuzzara.it/userfiles/files/32369841828.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/160e5159595ca9---94483015243.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/73d0e7b8332d01534c62b5408f3d502d/wokivej.pdfIn PDF document text
    • https://glass-haus.ru/wp-content/plugins/super-forms/uploads/php/files/b07b1cda2e6a71c5657f1faedb69174b/remajanojit.pdfIn PDF document text
    • http://www.mostenpo.jp/userfiles/files/94562764307.pdfIn PDF document text
    • http://quaretti.it/userfiles/files/gijawulusudumoxanexukim.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/72039986218.pdfIn PDF document text
    • http://tiga.co.th/ckfinder/userfiles/files/21900986825.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=inventor+drawing+templatePDF 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_off0000dbfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBFB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF412 10668 bytes
SHA-256: 33498cc59e420db67738b3457af8ad3d3446c9b1950fe49a16801b7055c3d765
font_02_sfnt_off00010c46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C46 18740 bytes
SHA-256: 50f6bee6b43fd424ad0657ea03bba4f111f07b4204a689c106fb54e93c1ad29d