Malicious PDF — malware analysis report

Static analysis result for SHA-256 eecba182a33f369c…

MALICIOUS

PDF

71.7 KB Created: 2021-09-03 21:05:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: ea059efdf98934dedd144e1ff0e0c663 SHA-1: 7d3d61234b24e6826cad470efaa8ebb553ff8281 SHA-256: eecba182a33f369c709571c65a253260bb08a0b8390bf979425e8ea761e442bc
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to compromised or disposable domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://terhautz.com/upload_files/files/12236724667.pdf In PDF document text
    • http://buddhavehicle.com/userfiles/file/48139652194.pdfIn PDF document text
    • http://midlandhigh65.com/clients/6/68/682e31fde28f8c6bff7ebba57332ef5f/File/27013649769.pdfIn PDF document text
    • http://russia-ex.com/loruxotuvin.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/baxime.pdfIn PDF document text
    • https://air-separation-supplier.com/d/files/32237845904.pdfIn PDF document text
    • http://automozg.by/upload/editor/files/fobupitofetij.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/96f513b1c1a076691b9c7a0ed0f44c85/4466563986.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d5fa972373---zufivowibiwekewawaloleb.pdfIn PDF document text
    • http://innotack.com/userfiles/file/42836698584.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160d005799ad4a---91221099476.pdfIn PDF document text
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/9f569286de6f0ad9ac60d3211d59a024/xivod.pdfIn PDF document text
    • http://farmaciacogliate.it/userfiles/files/nisuzivisizesedexuzilub.pdfIn PDF document text
    • https://www.tamilsaga.com/ckfinder/userfiles/files/mefopogi.pdfIn PDF document text
    • https://ankaratemizlikcim.com/depo/sayfaresim/file/37111208484.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/19kah18b7rlhvu6j5fsbhb7fmn/padewevofiv.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/459e16e66db4898f6ce036b3ce69e37a/59083754790.pdfIn PDF document text
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4daf4c0631---xalimukumosupuvizuritibak.pdfIn PDF document text
    • http://www.anieliasfx.com/uploads/textareas/file/46792266889.pdfIn PDF document text
    • http://bmsorganica.com/userfiles/file/30761743048.pdfIn PDF document text
    • http://frigosztufi.ro/ckfinder/userfiles/files/xoletive.pdfIn PDF document text
    • https://almentispharma.com/ckfinder/userfiles/files/jinopewux.pdfIn PDF document text
    • http://hengtaixin.com/HangShun/ckfinder/userfiles/files/givewilavabububaxab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=hudson+reed+thermostatic+shower+valve+manualPDF 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_off0000b8ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB8BA 10876 bytes
SHA-256: ac5f215f564f7e242aa1d834475ca20f8502085d68129e5d17b92ad37784e9fb
font_01_sfnt_off0000d1aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1AA 15500 bytes
SHA-256: f8da16d03617e46344f4a197fdf03c794c85b4eb9c786816a610e011958c60fe
font_02_sfnt_off0000f959.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF959 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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