Malicious PDF — malware analysis report

Static analysis result for SHA-256 f74be5ce30333742…

MALICIOUS

PDF

78.3 KB Created: 2021-09-02 03:25:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: b8b39e3a2c9a98f289ffe85e20d3061b SHA-1: 69620b5a6a0b1a8a6d62e76f825a124d2549ccde SHA-256: f74be5ce30333742058653ef82b0145d2c804a4f51345ce08617931a59d74779
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution intent. It contains a link farm pointing to multiple domains, many of which are hosted on compromised CMS upload storage, suggesting an attempt to obscure the true malicious destination. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest it is designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b4582774586---lasexosiludawipi.pdf In PDF document text
    • http://feynburg-uhren.de/uploads/ninep.pdfIn PDF document text
    • http://www.restorationservice.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1607336af421cd---89613734791.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/zisugizoleduzoroze.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/22347910421.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/1610499124570f---10563079029.pdfIn PDF document text
    • https://medprobr.com.br/wp-content/plugins/super-forms/uploads/php/files/1655e83cd82706094bc71692697a88a1/81592352289.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/24875799511.pdfIn PDF document text
    • http://www.conectadoscomdeus.tv/arquivos/file/83997781752.pdfIn PDF document text
    • http://xn--vb0b83rba554gca.kr/page_data/file/20210816103108.pdfIn PDF document text
    • http://dailyliving.nl/ckfinder/userfiles/files/vinopixaji.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160cde9046ad62---21842237211.pdfIn PDF document text
    • http://ldbell1965.net/clients/85689/File/zebalemuxite.pdfIn PDF document text
    • http://ingatlantv.tv/userfiles/files/furumawopukiwa.pdfIn PDF document text
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160add30226d8c---wijikozoporawaduwe.pdfIn PDF document text
    • http://heldermusic.nl/ckfinder/userfiles/files/32878229997.pdfIn PDF document text
    • http://meble-tk.pl/userfiles/file/6418384861.pdfIn PDF document text
    • http://deauville.ru/files/file/24527248771.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/d5799d18f2363f06a5094b9b956aa4ab/jisijebamegumejoxeso.pdfIn PDF document text
    • https://istanajpdua.com/contents//files/zukifijamigul.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b123d042f---26722953845.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=how+do+you+reset+an+iphone+11+proPDF 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_off0000cc8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC8F 17360 bytes
SHA-256: 3e203c3719748ef559a02bc19e85c456abcab0e368029c1b586dc8b45de11138
font_01_sfnt_off0000f95f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF95F 10788 bytes
SHA-256: d047b577ff832c22a8594e979f5f071579b4af95f6d8298c20f8f1571a1485f0
font_02_sfnt_off0001123d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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