Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e54fd74771333b0…

MALICIOUS

PDF

223.1 KB Created: 2021-08-10 16:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 7383bf76d7d3909ea8613aa051beced0 SHA-1: 063c5e132e9117b1931b8d3d0fbe2bae63e43e95 SHA-256: 4e54fd74771333b0a8eedd0f7c8fe174d1e85538ff5b8e2d138bec61165df243
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The heuristic 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' indicates that the document links to compromised WordPress sites, likely serving as a distribution point for further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9773

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://asokmontridental.com/userfiles/file/82254187923.pdf In PDF document text
    • http://mawaevents.com/uploads/file/rotizakajakegagixekalama.pdfIn PDF document text
    • http://cicm2015.mist.ac.bd/app/webroot/ckfinder/userfiles/files/vivukunugupotowosopinadet.pdfIn PDF document text
    • https://www.ibyservice.com/wp-content/plugins/super-forms/uploads/php/files/8e5f51c957463f30d59021e6d79fe8df/26906865604.pdfIn PDF document text
    • http://lawngo.net/fckfiles/45516754619.pdfIn PDF document text
    • https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/fsmp4r4ds35ftt0lvi68s085oc/29829093082.pdfIn PDF document text
    • http://donaldbermanmaimonidesgolf2021.com/clients/0/0d/0d43fbb8ff91cab41fa1b056c0d912a9/File/dotijan.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/645a35bfd612c9652057d090444c59ed/68455545245.pdfIn PDF document text
    • http://balogmihaly.hu/UserFiles/file/sozikeragirapobobesud.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/jubupenapulaganepogafo.pdfIn PDF document text
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/7d223533f6bbbf0acbaf5264cdf93041/91382799994.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/m0nlqf1lieopjck5p7p45fo651/23703433246.pdfIn PDF document text
    • http://vce34.ru/attachments/file/25057867311.pdfIn PDF document text
    • https://techielingo.com/fck_uploads/files/vijotutige.pdfIn PDF document text
    • https://www.ideaklinik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160c1615042b70---mubufe.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f5cf873f97e---60661890892.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/2aff54b33f1667532f12d1084ac45d0b/nuwagogusitoterelikonovi.pdfIn PDF document text
    • http://pitin-akutsu.com/js/upload/files/zepibin.pdfIn PDF document text
    • http://www.jimenez-casquet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ae35e29ed---zanelo.pdfIn PDF document text
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160786df4d9e48---90505004563.pdfIn PDF document text
    • https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/ecbqd4m6oipv3f1idsh5355bp6/16066951780.pdfIn PDF document text
    • https://aannemingsbedrijfbarthulsbosch.nl/userfiles/file/48920412661.pdfIn PDF document text
    • https://thewentworthco.com/wp-content/plugins/super-forms/uploads/php/files/vulug04t8sv229r3pkk1a71mt9/29861562286.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160875c7f5ffbd---dabap.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160b232a8ce996---9454614480.pdfIn PDF document text
    • http://oodow.cn/upload/file/2108081446354013093bjk87sxms7g.pdfIn PDF document text
    • https://go2germany.ru/files/file/98650966061.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=angry+birds+transformers+how+to+unlock+all+characters+2020PDF 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_off000301ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x301AE 21116 bytes
SHA-256: 64040f26a6e69606ea5f0383c7bf8c469d6d9f87ad78ebc59f2ce078c5a4ee20
font_01_sfnt_off00033951.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x33951 11676 bytes
SHA-256: 124dd2eef8e3ea4c0eacf7ab77b61e43041df17f5aaad705d88ed9e227e7369e
font_02_sfnt_off000354e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x354E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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