Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7a39dd6b9497541…

MALICIOUS

PDF

96.9 KB Created: 2021-09-03 04:21:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: de72c939774160e067bfff41169dfb1e SHA-1: 0f7ce8352395a7c83e92c67771230fefc9a8594f SHA-256: e7a39dd6b94975411624701c1ee32bafa22f1a122e7b03590eaec98206b735f5
156 Risk Score

Malware Insights

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

The sample was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable domains, suggesting a link farm or phishing lure. The PDF's structure and embedded content indicate it is designed to redirect users to potentially malicious sites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4464c091cb---16785848770.pdf In PDF document text
    • http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16080bdfa17573---6870635291.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/dobawirixakuseg.pdfIn PDF document text
    • https://euforbiabulgaria.com/uploads/pages/files/1895255400.pdfIn PDF document text
    • https://www.geosuiteonline.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084bd7c0413f---belewudufigugerakalere.pdfIn PDF document text
    • http://mopron.ru/upload/files/74693809352.pdfIn PDF document text
    • https://bonekarusa.com/contents//files/bivujalib.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/8d3b846040f72a59094a69f10a474195/49621297095.pdfIn PDF document text
    • http://www.sbawerribee.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071b23ba0d1d---22934076677.pdfIn PDF document text
    • https://doanandieuduong295doson.vn/namthuan/images/news/files/duwatigozejul.pdfIn PDF document text
    • http://rickgrisolia.com/userfiles/files/25582009218.pdfIn PDF document text
    • http://taiwan-casters.com/userfiles/file/99353595164.pdfIn PDF document text
    • http://slavutich-media.ru/userfiles/file/85650679205.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609dda4aee4bc---fejurirofemo.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/160733e93a7b38---13351490234.pdfIn PDF document text
    • http://tverzhilservis.ru/foktver.ru/ckfinder/userfiles/files/73437180199.pdfIn PDF document text
    • http://maslatalaia.com/userfiles/file/zejebiniruboloruse.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609257b556ecf---mikujidaxezenidefu.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/b6nfpsguc7f45tl5s1g8h1g44v/82131592231.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/35a30eef8207923835598a5fbc64fcde/jeropukolefizum.pdfIn PDF document text
    • https://klubkanine.com/home/klub/public_html/ckfinder/userfiles/files/83097022638.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=pdf+pancasila+sebagai+etikaPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001196f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1196F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013186.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13186 10808 bytes
SHA-256: cc26a5660633ee48065ae7547b6240b14f5b9106d31c27408343b23ab58dae12
font_02_sfnt_off00014a25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A25 17008 bytes
SHA-256: e6d4482531770a0070ea4b12ee18a18b5f9ad4f91c9f1bffa7636066eb5df53f

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