Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f67bcbdb6ef350…

MALICIOUS

PDF

80.8 KB Created: 2021-09-10 13:16:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 6a79c8c3ae81277f4e694287a3d5f151 SHA-1: bcb8bfeb8f38ac407a6ac38c5b82d26f75ba2bf5 SHA-256: 47f67bcbdb6ef35026e1c85bbd733b0c47eadd7fadd38cc4868ebe23896acf29
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan' and a high ML score. The presence of embedded JavaScript and numerous links pointing to potentially compromised or disposable hosting sites suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution. The document's structure as a link farm on compromised WordPress uploads further supports this malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

Heuristics 7

  • 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.
  • 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://albarossa.jp/js/upload/files/kejovo.pdf In PDF document text
    • http://malir-naterac.info/UserFiles/File/zolomopuvuvukuxilat.pdfIn PDF document text
    • https://tennis94.fr/img/pics/files/ninotasivi.pdfIn PDF document text
    • http://ncfc.com.tr/ckfinder/userfiles/files/nemovafodalafewibugo.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138175b377f6---99314996487.pdfIn PDF document text
    • http://mingzhicc.com/userfiles/files/jatedunetik.pdfIn PDF document text
    • http://laserinnsbruck.com/static/23285424571.pdfIn PDF document text
    • http://xn--12cbg9dihj7egda2g6a7dceb1d2cp4nvgf4f.com/datas/files/3975052371.pdfIn PDF document text
    • https://chasehr.in/userfiles/file/vidopuzelujaxovuvowawu.pdfIn PDF document text
    • https://halkapsikoloji.com/userfiles/file/jigoxisimiwule.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/posiwezofebomidiwiz.pdfIn PDF document text
    • http://bienbao.net/uploads/files/panuba.pdfIn PDF document text
    • https://www.accidentinjuryalbuquerque.com/wp-content/plugins/super-forms/uploads/php/files/sld6s69tt3tbb0l16bfqg0lurd/68402083845.pdfIn PDF document text
    • https://ribaczpeter.hu/files/file/wuliwobake.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/161378549af85c---loduz.pdfIn PDF document text
    • http://evpltravel.com/xv_image/file/24828661020.pdfIn PDF document text
    • http://haiqi-machine.com/d/files/95097935329.pdfIn PDF document text
    • http://abwingsva.com/uploads/files/gezojolimeriretoloxi.pdfIn PDF document text
    • http://datong-travel.tw/upload/ckeditor/files/20210908212836.pdfIn PDF document text
    • https://ermolino.mebel18.com/uploads/files/55966598930.pdfIn PDF document text
    • http://summitremodelinginc.com/userfiles/files/75959774937.pdfIn PDF document text
    • http://vipacademy.org/userfiles/file/25058012163.pdfIn PDF document text
    • http://sprinter-lab.ru/content/File/54193241306.pdfIn PDF document text
    • http://avision-italia.com/userfiles/files/76323307913.pdfIn PDF document text
    • http://viettruss.com/upload/file/kisaxowakitafapobeled.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1613a9e129d97e---tomevodomizakujilokaned.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=sadak+mp3+songPDF 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_off0000d7ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7EF 10604 bytes
SHA-256: b85450dde8484db721fa9d608712a5339deb2fe5575cacca1b7a985072c0a305
font_01_sfnt_off0000efda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFDA 17612 bytes
SHA-256: 411f46050c87056ceb32b10862d1109e23f7618298112db729e4d8deb1ab1d3c
font_02_sfnt_off00011dae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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