Malicious PDF — malware analysis report

Static analysis result for SHA-256 02b475ed217897cf…

MALICIOUS

PDF

102.7 KB Created: 2021-08-03 22:32:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 850a6ea760e6684b63845e5887dd3864 SHA-1: cd04b2c1948ce01016224c31673c30aa742be43c SHA-256: 02b475ed217897cfb5f048629513ee18fc7697218e9d111731bf623bbe1db08f
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and disposable hosting, suggesting it functions as a link farm to distribute malicious content. No scripts were extracted, but the presence of multiple external URIs and the overall structure indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://juegosinflablesarizona.com/files/58577922626.pdf In PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/vscvk4pj4uchj96r6k8vkatjd2/sabipi.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160bbbef02d065---38316392703.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aaa1eb468f8---52871126376.pdfIn PDF document text
    • http://chargers68-50th.com/clients/3/3d/3dd154274af4887fbe356f6dcfc18689/File/bipukafuparifebakite.pdfIn PDF document text
    • http://xn----gtbercbfedtm3b.xn--p1ai/admin/ckfinder/userfiles/files/6416344906.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071b645eb2ec---zavorofisuzulu.pdfIn PDF document text
    • http://www.vinoplaza.nl/img/upload/files/43354466560.pdfIn PDF document text
    • http://simonhoirup.dk/userfiles/file/doxarazananig.pdfIn PDF document text
    • https://www.marbelitesa.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b2afe3159dc---nejerotokeja.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad1133c86bc---wijufuzifojulepobitoj.pdfIn PDF document text
    • https://pointswestliving.com/ckfinder/userfiles/files/nuzinotuziwexixaguba.pdfIn PDF document text
    • http://fincasotilloviejo.es/files/sotillo/_repo/file/risidotupixifisopoxor.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/74b41bd064d3ff99c66cb0fa1d9d86e1/pefazuzolami.pdfIn PDF document text
    • http://jpsacademy.com/slbdavbatala/userfiles/file/25547093695.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/06/28/file/20210628_032055_107.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c328b0772a---65856935255.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/510ddb14cdc215a93e8919e6a022b005/73620419290.pdfIn PDF document text
    • https://accesoriosalmayor.com/images/userfiles/file/84076334966.pdfIn PDF document text
    • http://bjbtrh.com/files/pic/file/wevukikivuxozuzotesala.pdfIn PDF document text
    • http://telmeed.com/web/ckfinder/userfiles/files/31241200967.pdfIn PDF document text
    • http://braintradingbcn.com/wp-content/plugins/super-forms/uploads/php/files/3ef5278831dd9ecda091320e51689be4/89918175857.pdfIn PDF document text
    • https://client-sms.com/ckfinder/userfiles/files/1434789833.pdfIn PDF document text
    • http://stonestudio.pl/files/upload/file/jemazisibu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=xtreme+good+guys+vs+bad+guys+unblocked+77PDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011f2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F2E 19504 bytes
SHA-256: 807d777a4ffa6307419b17e063b5a4de4d9c3943b97a5a6d2b7f14382b935d84
font_01_sfnt_off000150a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150A0 11188 bytes
SHA-256: 71d201c60c170af0a179477f228754df177c17fe566c7e07cdf4b175a0358e2f
font_02_sfnt_off00016ac0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AC0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000182cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x182CD 1932 bytes
SHA-256: 78b0a163e4eaea4fd1c276a6e09b3ffe8714eb7cdf5cd8e6d31ca7f4d18684d2

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