Malicious PDF — malware analysis report

Static analysis result for SHA-256 d19361e3e3eb0905…

MALICIOUS

PDF

72.4 KB Created: 2021-09-18 14:54:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 2f93c586a793fa4788998b45e82519a2 SHA-1: 910caf7787c0508abdcabe08d9ab0a3e4798b8b7 SHA-256: d19361e3e3eb09059554abc0673be2fa76b43dfa6a1c1b508845f36c8ec0760e
156 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which appear to be hosted on compromised or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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 https://infrive.ru/uplcv?utm_term=to+be+activities+pdf PDF link annotation
    • http://carrozzeriabosini.net/userfiles/files/94722249679.pdfIn PDF document text
    • http://dermatologomiguelgallego.com/miguel/fck/file/luxenulole.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/xajawilokubedefudomuxedog.pdfIn PDF document text
    • http://hotelbasantresidency.com/uploads/95476959673.pdfIn PDF document text
    • https://www.lsv-wittlage.de/ckfinder/userfiles/files/68925107149.pdfIn PDF document text
    • http://xedaphcm.com/luutru/files/12999927336.pdfIn PDF document text
    • http://tanriovermensucat.com/uploads/genel/files/97292757460.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/rumuzibudadiravonoxemero.pdfIn PDF document text
    • http://agriturismolescuderie.eu/userfiles/files/sojilokemurazofasi.pdfIn PDF document text
    • http://fewo-spreewald-schoetzigk.de/brandenburgtag/img/editor/file/40830138141.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142f1bc56fcc---berizoru.pdfIn PDF document text
    • https://apz-arte.com/ckfinder/userfiles/files/52033622575.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/4vap17dcj0j2anf0ha39n2kds2/8883006202.pdfIn PDF document text
    • https://www.glasswindowequipment.com/wp-content/plugins/super-forms/uploads/php/files/1d985f0abf7abcf5cb34560f6fff515c/14442857591.pdfIn PDF document text
    • http://balletpanov.com/uploads/files/78542691699.pdfIn PDF document text
    • https://www.hkha.com.hk/ckfinder/userfiles/files/desotafofegofe.pdfIn PDF document text
    • http://secureyun.cn/uploadfile/file///2021091202553132.pdfIn PDF document text
    • http://porpora.info/imagenes/imagenes_contenidos///37042947151.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/lariluditukim.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/16144cafc78c7f---95527246275.pdfIn PDF document text
    • http://pk.mo/userfiles/file/furazokevor.pdfIn PDF document text
    • http://dagmare.de/userfiles/file/jowanerefabom.pdfIn PDF document text
    • http://edilcfcostruzioni.com/userfiles/files/50414240268.pdfIn PDF document text
    • http://temple.mo/userfiles/file/zojib.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/67106288284.pdfIn PDF document text
    • 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_off0000bc2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC2A 15648 bytes
SHA-256: 90e634a46e81a1fb9e417077530e11d593f2ab405c3769649b40e9d6706a95f7
font_01_sfnt_off0000e41d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE41D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fc34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC34 10532 bytes
SHA-256: 20011ce869765f6e0102796f3e16996fbd360013eb0df8204dbe9308a8e426b6

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