Malicious PDF — malware analysis report

Static analysis result for SHA-256 35b838060daf92a5…

MALICIOUS

PDF

84.8 KB Created: 2021-10-06 04:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 30527407eb3e9b6217b9c367b7d6596d SHA-1: 7234cd514dfe7df41ac3997ea8ca731fa1ed522c SHA-256: 35b838060daf92a5f8eedb355a19997ffa8ca73357e1bb62fb97c99c5e04f014
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple external websites, some of which are hosted on compromised CMS uploads. The embedded URLs, such as http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613c97e09298d---62989423346.pdf, are likely intended to host further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://barcelona-health.com/files/galeria/files/38365982630.pdf In PDF document text
    • http://shbaicun.com/userfiles/file/2021092204130473499.pdfIn PDF document text
    • http://resortvillairene.it/userfiles/files/16608788021.pdfIn PDF document text
    • http://netmutum.com/userfiles/file/gufidoko.pdfIn PDF document text
    • http://toyotacri.com/userfiles/files/17532926380.pdfIn PDF document text
    • http://georgewongdesign.com/gwd/upload/files/49526289102.pdfIn PDF document text
    • http://kodemari.info/data/files/17565625375.pdfIn PDF document text
    • https://profm.hu/files/file/25579997786.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613f778275977---89490528872.pdfIn PDF document text
    • http://pospatrans.cz/UserFiles/File/51399081895.pdfIn PDF document text
    • https://uhcp.com/editor_upload/file/betebaroxitudejipox.pdfIn PDF document text
    • http://struttur-arch.it/userfiles/files/18965039912.pdfIn PDF document text
    • https://sportscientistsviews.ijmsir.com/ckfinder/userfiles/files/55780971234.pdfIn PDF document text
    • https://www.geya99.com/ckfinder/userfiles/files/40217743862.pdfIn PDF document text
    • https://sensiblemachines.com/ckfinder/core/connector/php/files/wezarakemabe.pdfIn PDF document text
    • https://manorhair.com/uploads/files/202109290019084832.pdfIn PDF document text
    • http://appextskihjthj.handysociality.com/upload/files/kevakuxovobus.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/1613c97e09298d---62989423346.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/zidejunafitopusa.pdfIn PDF document text
    • http://drairtools.com/ckfinder/userfiles/files/65810892685.pdfIn PDF document text
    • http://coyada.com/up_images/up_images/46747879825.pdfIn PDF document text
    • https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/16146a3ec35ce8---lemenamesunelomagixekiko.pdfIn PDF document text
    • https://cortopolis.ar/userfiles/file/71184043025.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=perfect+match+full+movie+download+mp4PDF 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_off0000e3a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3A7 11048 bytes
SHA-256: a60523bfec076e751ef1426486f49737eed0d0d95af8246b1d7bf17572856943
font_01_sfnt_off0000fd3e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD3E 18672 bytes
SHA-256: 5974ba34d8a1b770eb59c4f3144f6a9f2e64793c29d9fdf6d556fab3d92123bb
font_02_sfnt_off00012d26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1