Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f377f308160d67a…

MALICIOUS

PDF

85.8 KB Created: 2021-09-02 08:52:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: da27503d9f78d09b4643551f1ddab3fa SHA-1: 30fd4f0c6e8d1c2d16ed5037a914ea1ac4d88bb3 SHA-256: 9f377f308160d67afe5e1f0eed9e3d0438bef39645b9c7944e9f0f0d433bffd0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting, suggesting an attempt to redirect users to phishing pages or download further malware. The presence of multiple external URIs and link farm heuristics strongly supports this attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://ginniglobal.com/uploads/file/kibotedu.pdf In PDF document text
    • http://aquamedia.cn/ckfinder/userfiles/files/25440035462.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/c0b4f0ead059c65398937cd06aa0c996/32660049055.pdfIn PDF document text
    • http://gtshotel.it/images/file/tupefalovixixax.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/tijujukezanapovukeji.pdfIn PDF document text
    • http://mspchicagolaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/12238141960.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/161183d1c20563---49858762470.pdfIn PDF document text
    • http://uk-finansist.ru/userfiles/file/27902299042.pdfIn PDF document text
    • https://net-mex.hu/ckfinder/userfiles/files/lufaxovitixogulimidobol.pdfIn PDF document text
    • https://citronel.com/userfiles/files/tolufafigakawodivatemupe.pdfIn PDF document text
    • http://pillshop.ru/uimg/files/woxumadinaloxi.pdfIn PDF document text
    • http://fairbank-ia.org/admin/ckfinder/userfiles/files/xivuped.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/65845812768.pdfIn PDF document text
    • https://gtselect.fr/ckfinder/userfiles/files/jidakopanekogo.pdfIn PDF document text
    • http://savitapiti.org/ckfinder/userfiles/files/molisenorusasipanarufam.pdfIn PDF document text
    • http://www.euro-fly.eu/userfiles/files/52839896714.pdfIn PDF document text
    • http://midiabyz.com/wp-content/plugins/super-forms/uploads/php/files/f1f50771bb08c889b33515b20328b8b7/jakajujabokupituratezot.pdfIn PDF document text
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/fdbb463fe807af2960e2d3dfa5d2634e/bilifopiwusonodagij.pdfIn PDF document text
    • http://www.psychophonie-tarbes.com/ckfinder/userfiles/files/10803994353.pdfIn PDF document text
    • http://twxcd.com/img-aim/files/nunixomenasoturavovip.pdfIn PDF document text
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160717126e9b47---duzototikijibedaripude.pdfIn PDF document text
    • http://www.deep2001.com/images/library/File/48349769467.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/turatojisefafugimodizogiz.pdfIn PDF document text
    • https://astoriareiki.com/wp-content/plugins/super-forms/uploads/php/files/1475246be9c9fe0e712b4807384a3578/22223253651.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/24054604744.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f867abd671---59203708604.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=the+different+archangelsPDF 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_off0000e666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE666 19404 bytes
SHA-256: c9bd8ba35e059d56678d5f6cb1f29b25f2db9de2134f8c07e0204c25653d473c
font_01_sfnt_off0001198d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1198D 10600 bytes
SHA-256: 59d3dc67b30fdaafc2fa2906316f41d2f8ebb8a21a7c83dfd44beb62ceb5ff47
font_02_sfnt_off00013174.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13174 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.