Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4602e81aadc64fa…

MALICIOUS

PDF

88.1 KB Created: 2021-08-06 15:42:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 9f4b9db0e620c492e41459e679d5d46e SHA-1: af8a0a0c6ed3d70adb27fbd8f0edd7ac4cced125 SHA-256: e4602e81aadc64fa992926614c83361087485cc93aef89e58a18fb9adb13d1a8
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, forming a link farm. The primary purpose appears to be redirecting users to external sites, potentially for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/16b86945b42735cf9fd87d88cd5b91f0/5223922058.pdf In PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7bd95ca465---53200737829.pdfIn PDF document text
    • http://www.onlinetemsilci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e45426e567---sisagawofevilon.pdfIn PDF document text
    • http://agataklimowska.pl/userfiles/file/51731328045.pdfIn PDF document text
    • https://apinero.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bdc5861eb4---28144319993.pdfIn PDF document text
    • https://realestateconnect.biz/wp-content/plugins/super-forms/uploads/php/files/1n5usiitgrvtd19djg43dbrqj0/78608435336.pdfIn PDF document text
    • http://gillsandgeckos.com/userfiles/file/gerajomebuw.pdfIn PDF document text
    • http://hy-concrete.ru/d/files/85145886900.pdfIn PDF document text
    • https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/73d2b473d2a4611bd8cc8674649a034a/20705201329.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16071394f43d4e---40981157036.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/9c88e189b163e18bdf064f853535bf73/11900882814.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/paxewibip.pdfIn PDF document text
    • http://geose.ru/userfiles/file/39995855363.pdfIn PDF document text
    • http://telekommarketing.com/firme_data/files/68276685404.pdfIn PDF document text
    • https://sluganarodu.org/userfiles/files/45792410696.pdfIn PDF document text
    • https://brune-schmuckwerk.de/ckfinder/userfiles/files/gututebigevomigewimaja.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/24e334ff9e1d1e8fa1ecbc2b703cc9e5/pimidozemezukasajudamup.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608e703f019d5---zaguvefodumokov.pdfIn PDF document text
    • https://larustt.com/upload/ckfinder/files/lixiri.pdfIn PDF document text
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/c52e0176756c78f1636be9520837ad54/98932690380.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/ab85f795a7b16a53d76f83fe44310961/8107367259.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bba17484888---78929230711.pdfIn PDF document text
    • http://mmdplus.com/userfiles/files/20210616_034854.pdfIn PDF document text
    • http://marketherballize.com/ckfinder/userfiles/files/zuwolupugokexok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=brainly+mod+apk+premiumPDF 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_off0000f262.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF262 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010a74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A74 18436 bytes
SHA-256: 8572f94a072ce578629e4a2051daf42c99d5b16838caec5177f0ea744c6b234c
font_02_sfnt_off000139f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139F4 10648 bytes
SHA-256: 3d60bb4a46e4d79701f3751c7c622c14b3c93ae02e9654915aa13a9974092855

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