Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd02ba8362364ed3…

MALICIOUS

PDF

78.1 KB Created: 2021-09-12 18:45:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 10248ae65acd631c43891eddc8c8109c SHA-1: 57871ae7784fe1989a636ae4eae0743d9d7a8d3f SHA-256: fd02ba8362364ed3af6df1a90609aa735f0e38aef12c721270de02a147020b18
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and a significant number of external URIs, many of which point to compromised WordPress sites or use disposable hosting. These links likely serve as a link farm to redirect users to malicious content, potentially leading to further malware downloads. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://cottoneauto.it/userfiles/files/tarodojukizu.pdf In PDF document text
    • http://lejuriste.ru/files/file/77530274950.pdfIn PDF document text
    • http://avvocatogiuliani.it/userfiles/files/vapupevaleguvokaj.pdfIn PDF document text
    • http://restavracia02.com/userfiles/file/36820340159.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/52183691016.pdfIn PDF document text
    • https://mannerfeltdesignteam.se/ckfinder/userfiles/files/10175285694.pdfIn PDF document text
    • http://tcihk.com/userfiles/1522370367.pdfIn PDF document text
    • https://tpk-m.ru/files/file/duvokerod.pdfIn PDF document text
    • https://qatarsecurityservices.com/public_html/userfiles/file/34834971748.pdfIn PDF document text
    • http://surveycook.com/upload/tmp/202109/file/wulofebobumejaj.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130021851dcb---kuriboboreboxinekitu.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/161308f75ebf21---tonoxonemivag.pdfIn PDF document text
    • http://topmebli.com/content/xuploadimages/file/75367885751.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/009c6c96d67acd2303189d4bf2916930/42683913682.pdfIn PDF document text
    • https://thebottombillion.org/business_school/uploads/file/fidixirewogegarimine.pdfIn PDF document text
    • http://mediasingrid.com/js/new/fckeditor/userfiles/file/gufenoworug.pdfIn PDF document text
    • https://pakianco.ir/data/image/uploads/news/files/43042792721.pdfIn PDF document text
    • http://aaas.handyfriendship.com/upload/files/8381453735.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613e1bad24a26---89626982291.pdfIn PDF document text
    • http://ulv-fogger.es/d/files/72247172263.pdfIn PDF document text
    • http://127.0.0.1/bantraicay/js/ckfinder/userfiles/files/ziwojujatasaremegaf.pdfPDF link annotation
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/42a4b72bf532d03e247620b583eea9c5/xexurigo.pdfIn PDF document text
    • https://htapigroup3.com/contents/files/90320224132.pdfIn PDF document text
    • http://napiarsaigh.com/images/55174881357.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=square+root+of+789PDF 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_off0000cbb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB4 17876 bytes
SHA-256: 32952965dae19be80331e2e3c6703d8f9612c310ee7c700d6d6eceae905be2a0
font_01_sfnt_off0000fa53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA53 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001126a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1126A 10544 bytes
SHA-256: d8febbf9dbec18ba0a305b66b6acb5412a14fbd84e716e8b438ef3c4fa9f9d01

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