Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5d017004a4c20be…

MALICIOUS

PDF

83.6 KB Created: 2021-09-03 19:28:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9a80fd42b5a876870fccbd7893916445 SHA-1: 4ee45db1a712533fa2385fac53612dd6eee37446 SHA-256: b5d017004a4c20be023257ebbffa0654ddb52a946585907afafd2718fe53361a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution attempt, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/a07d6e4b33e041b4db6fc8f3ddef8780/42683707778.pdf In PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16087c8894666f---kemugijarosugu.pdfIn PDF document text
    • http://schouteninterieurwerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c8b1f7479b1---93950875566.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/1253d595b2d102962771d56526b72570/sevesimagavegoziwokemabe.pdfIn PDF document text
    • https://securitydm.net/slicice/file/28673521969.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/7c602ab57b88668ae99e53c9d100520b/84657167359.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160933eae8cfad---nenuvune.pdfIn PDF document text
    • http://davcpundri.com/css/file/48057280080.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877afe24691---gojotaragadusebox.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080ce8957758---fetoralasivimaxex.pdfIn PDF document text
    • https://butterfly-propertymanagement.com/userfiles/file/balaroluviweginebutev.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/9e267a302d7d031cf41739deb379deab/95950623634.pdfIn PDF document text
    • https://infotechsystemsonline.com/ital/www/img/file/26497944568.pdfIn PDF document text
    • http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160b08df73403d---kixomoxugomo.pdfIn PDF document text
    • https://fieldofgreen.com/wp-content/plugins/super-forms/uploads/php/files/413426c87b7280109613891f42627821/lutararadudidazu.pdfIn PDF document text
    • http://dsagco.com/Upload/file/nojufigopura.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/labemonuzuseponomoweseto.pdfIn PDF document text
    • http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/8df000893f4b9a470d0b374cb6616455/79376874093.pdfIn PDF document text
    • http://residenzaeden-albisola.com/userfiles/files/boresanu.pdfIn PDF document text
    • https://vendax.ro/files/file/25264447590.pdfIn PDF document text
    • https://www.straightmyteeth.com/wp-content/plugins/super-forms/uploads/php/files/b13d4fe3c2983e511bd0c083cf3c195b/sademo.pdfIn PDF document text
    • http://cke.hk/userfiles/wafevokagudigudanore.pdfIn PDF document text
    • http://novena99.com/uploads/files/202108160350582449.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=samsung+microwave+manual+pdfPDF 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_off0000e1b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1B4 11192 bytes
SHA-256: b5ba0a8611fd6833aec9efa030266980d6c6d4b5e577e40676ed9f1931e6395d
font_01_sfnt_off0000fbb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBB0 17364 bytes
SHA-256: b863f61ed8ee56218d75b2103bd3a601c687c08a74c2aa378570056ea7596294
font_02_sfnt_off000128cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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