Malicious PDF — malware analysis report

Static analysis result for SHA-256 150f3f2ade5dfd38…

MALICIOUS

PDF

81.9 KB Created: 2021-09-18 22:10:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 9fb83c1396c52a49a8b7475616e946de SHA-1: 9a43c1042071861a4e870050c6c5cfa4c4bc3feb SHA-256: 150f3f2ade5dfd38954fbf311f2d5ff9aeb7536ec7745074de2cd90fb15ffc0a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external resources, many of which point to compromised WordPress sites. The high-severity heuristic 'PDF_RANDOM_URL_LINK' and the ML classifier output strongly indicate malicious intent. While no scripts were explicitly extracted, the nature of the links suggests the PDF is intended to facilitate the download of further malicious content, likely through a phishing or social engineering pretext.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141ed856e89a---xinimisokofewoxagupusijar.pdf In PDF document text
    • http://sntaviator.ru/ckfinder/userfiles/files/xevujexetudowubejuwodi.pdfIn PDF document text
    • https://conrays.ru/f/data/14684789017.pdfIn PDF document text
    • http://stroytehcentr.ru/images/file/lizibirajawatok.pdfIn PDF document text
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/161328767720fd---xolemexuxatoxitadak.pdfIn PDF document text
    • http://musik-fachberatung-neumarkt.de/images/uploadedimages/file/98036593054.pdfIn PDF document text
    • https://kirbas.com/img/uploaded/file/40604944661.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/681sb7nua5333bjj5u0o62hlv1/kigiterivujimepaba.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/84maiakiv2i6saa5q20g5pv9gf/misuwusegodimak.pdfIn PDF document text
    • http://studiogallerani.it/userfiles/files/62430602833.pdfIn PDF document text
    • https://cuatudongsaigon.net/uploads/files/93924639756.pdfIn PDF document text
    • http://aotwcasino.com/ckfinder/userfiles/files/lobogowuvewibozutefuwuben.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/161401b62b40e1---41258900036.pdfIn PDF document text
    • http://logisticsnetworks.net/ckfinder/userfiles/files/73647880805.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16136629125ecf---90299443074.pdfIn PDF document text
    • https://naucharts.com/ckfinder/userfiles/files/wefagasovegizelazojibolit.pdfIn PDF document text
    • http://musicandyouapp.com/webupload/editorimg/files/bonuvupalokake.pdfIn PDF document text
    • https://vidaleve.ind.br/ckfinder/userfiles/files/nerol.pdfIn PDF document text
    • http://hotel-gerard-dalsace.com/upload/document/sofagarimesenedigula.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/161409eadb6e99---93792886895.pdfIn PDF document text
    • http://officinedesign.it/userfiles/files/gepalejuvubonem.pdfIn PDF document text
    • http://huyminhplastic.com/upload/files/39065348612.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=download+gundam+battle+gunpla+warfarePDF 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_off0000d878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD878 18448 bytes
SHA-256: 0052c6324975e921ce8741bd7aa98ac1a0bfbf818d93d8ecee6e5f1aab29faae
font_01_sfnt_off0001088b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1088B 10908 bytes
SHA-256: e49f36cec61b05c246d9ae439a723f85c3a9ae4964197f06b657c230abd2733f
font_02_sfnt_off00012169.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12169 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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