Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0e6147b42cd016f…

MALICIOUS

PDF

82.6 KB Created: 2021-09-12 02:11:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4573a4f79e72a4343215b7266213a271 SHA-1: db24e74d4400a3a2fcd7b72178180bd337e9d4f8 SHA-256: f0e6147b42cd016f4bb845f684c013b3ba3177e4fa8ab245cf894e3e31574ea7
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. Heuristics indicate the document functions as a link farm, directing users to multiple external URLs, some hosted on compromised CMS uploads or disposable domains. The presence of numerous unknown URLs suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 6

  • 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.
  • 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://ndc-group.ru/uploads/files/bixebepinijabaridajovatak.pdf In PDF document text
    • http://bawaconstructions.com/editorData/file/zidewipula.pdfIn PDF document text
    • https://totounited.com/contents/files/21798388120.pdfIn PDF document text
    • https://maintogelonline2.bet/contents/files/jowixagejudanitawuwip.pdfIn PDF document text
    • http://baltic-rt.ru/ckfinder/userfiles/files/bodorexegejitodizur.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/028td6r43qbpj8m4btb8te3fj1/nufonewosapamoredolujina.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161377c18c6149---18151099180.pdfIn PDF document text
    • http://lmalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/4527487255.pdfIn PDF document text
    • http://jfhcoaching.nl/userfiles/files/2179382025.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385bf864e9b---rafidojuruvanupuwunepap.pdfIn PDF document text
    • http://www.taimaobi.com/admin/ckfinder/userfiles/files/12745101292.pdfIn PDF document text
    • http://studioriggio.it/userfiles/files/37054261746.pdfIn PDF document text
    • https://mk-sito.it/uploads/file/semutev.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/fezovarasul.pdfIn PDF document text
    • http://movitecnic.com/ressource/site-image/files/suzakuvuvipafomuvisosevup.pdfIn PDF document text
    • https://infrapanel-alegjobbfutes.hu/userfiles/file/77082348712.pdfIn PDF document text
    • https://billard-hauri.ch/userfiles/file/rewovosipidajaf.pdfIn PDF document text
    • https://krassimirtaskov.com/userfiles/files/sarovudemupof.pdfIn PDF document text
    • http://fractinvest.com/uploads/file/dulomikivem.pdfIn PDF document text
    • http://studiorestagno.eu/userfiles/files/toramiruzokekirudajolo.pdfIn PDF document text
    • http://rotarybrescello.it/userfiles/files/rosamilojilaxasikemo.pdfIn PDF document text
    • http://de.ruben.pl/ckfinder/userfiles/files/nutowawawopemudedam.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/kifubofumadegajej.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613a82d04c362---71044225020.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=best+android+10+gamesPDF 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_off0000dec1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEC1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f6d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D3 17640 bytes
SHA-256: 55525e6b53fdfed5c4818fad28029d291d748567d0e55b14c10c16e7442fb602
font_02_sfnt_off000124aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124AA 10772 bytes
SHA-256: 69c56ab886fec2c469926dbc50a1983a336cb6b952f5b913e335925e359f0ec4

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