Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d5381d6bbac9a4b…

MALICIOUS

PDF

91.8 KB Created: 2021-07-08 00:56:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 5a6d232f6a6442b378fae28957e3ec6a SHA-1: 444a4109c5ed6fdc053df63f3aa3aed505e1a42d SHA-256: 1d5381d6bbac9a4bcb076025b22b46d051663425c995d4b8c7105d37c7a82f7c
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains. The primary purpose appears to be to host or redirect to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/1606c819609063---75633865139.pdf In PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/17244808309.pdfIn PDF document text
    • http://31kouqiang.com/userfiles/file/1624768374.pdfIn PDF document text
    • https://www.indee-r.fr/wp-content/plugins/super-forms/uploads/php/files/4d1ebe020e2957a5074019634c190c3d/dapagadikodi.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/sowepemimopapilexola.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/0f557b8450af1c9ed98ea634ba5ed912/felivadelew.pdfIn PDF document text
    • http://argyler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160758f5571c87---tivubivoz.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/5ad5c4d26879714a82bfb8635048cf17/27296321502.pdfIn PDF document text
    • http://prunay-en-yvelines.fr/ckfinder/userfiles/files/23438123328.pdfIn PDF document text
    • https://travolution.travel/wp-content/plugins/super-forms/uploads/php/files/0f5d2235efe8e1a88aeddb2f0c8f4b2e/87372847618.pdfIn PDF document text
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160920b8b18954---gokexuxukupinurokiv.pdfIn PDF document text
    • https://ilexgold.com/app/webroot/files/userfiles/files/79717270618.pdfIn PDF document text
    • http://etenindex.nl/images/uploads/16462168284.pdfIn PDF document text
    • https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed145f1ba9---fasozusudokeferi.pdfIn PDF document text
    • http://better-pharma.com/images/file/files/77445955918.pdfIn PDF document text
    • http://princeworldwide.com/multimedia/userfiles/file/98497733256.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/10907092633.pdfIn PDF document text
    • http://staging.impactredevelopment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a3146d5dbf---13031046713.pdfIn PDF document text
    • https://ost-fogging.com/upload/files/vameniruvozejogibema.pdfIn PDF document text
    • http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf04d66d15a---tusamugewapapa.pdfIn PDF document text
    • https://renesens21.com/ressources/upload/files/93230770518.pdfIn PDF document text
    • https://rhagro.com.mx/wp-content/plugins/super-forms/uploads/php/files/3d1f8865311ed73e0f918bcfef740cea/95064683917.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=independent+variable+statsPDF 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_off00010797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10797 16648 bytes
SHA-256: aeeeba8a872996a72159e5b2b1a14a9069b0fd3ba24da4bf595bcf40ce1d44dc
font_01_sfnt_off000132df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132DF 10420 bytes
SHA-256: 9c5d4f3e14dc9e0a82572634bedbaa62cca4eadca74e0501e54906242a5b369a
font_02_sfnt_off00014a57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A57 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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