Malicious PDF — malware analysis report

Static analysis result for SHA-256 15e0af7559ee015f…

MALICIOUS

PDF

85.8 KB Created: 2021-09-02 03:23:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6d9645751f693d367c42ce8d7b6c9a93 SHA-1: b9a59d14f059dd69ac46cf40a05796e63c9497cb SHA-256: 15e0af7559ee015f16e29c3fe076574bee76bf1bbb64eb80ec4d4f6a8a92cfc7
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of links, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body is unreadable, but the heuristic findings strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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 http://brilspa.ro/userfiles/file///lakunobu.pdf In PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/f1b741a839a8760764d996e6de63cefb/batexesedafetop.pdfIn PDF document text
    • http://studiobaliva.eu/userfiles/files/sunune.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/161296df574acc---22783203053.pdfIn PDF document text
    • https://hospvetcentral.pt/site/upload/file/totofuxokiki.pdfIn PDF document text
    • https://ferado.vn/userfiles/file/dadexiri.pdfIn PDF document text
    • http://annabarons.lv/files/files/70192751731.pdfIn PDF document text
    • https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/e155538da20c6bf8ca9e7afd69e41d1a/47668905075.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a676c01b3---83033249643.pdfIn PDF document text
    • https://0924055971.com/uploads/files/202108151606433707.pdfIn PDF document text
    • http://ecohost.ru/pics/images/file/21904415189.pdfIn PDF document text
    • http://portamarioarchitetto.eu/userfiles/files/sutusitenujapamoneruv.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/g37tuokvm43l1qjj8f6bsjiosr/64841626583.pdfIn PDF document text
    • https://pfollowers.com/ci/userfiles/files/26100929317.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608a77304b59a---nusomuxiradowamujerag.pdfIn PDF document text
    • http://witnesstherealist.com/wp-content/plugins/super-forms/uploads/php/files/dbab546789ab8ea5720f78378d572ee0/74810189548.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/5f5b570721aecc9a78720b9b6db4435a/xowowojuxivawafeninejose.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/9da32dd9422a4192969d88cad8977a54/fimoso.pdfIn PDF document text
    • http://soc-in.com/data/media/files/babelibesikejulori.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210810/file/16286035836776.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/16078334d798cf---fawitawani.pdfIn PDF document text
    • https://levin-dent.ru/wp-content/plugins/super-forms/uploads/php/files/6b4863fd6e32a023379fbdc091d324ef/21420035972.pdfIn PDF document text
    • http://infinity-c-t.com/userfiles/file/tozixipatirusowi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=double+shot+at+love+streaming+vfPDF 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_off0000e4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fccc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCCC 10968 bytes
SHA-256: e75bacab5452cc853b129450c6f1f07da2d381aa051908def8dd5873c9a911b2
font_02_sfnt_off0001161e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1161E 19712 bytes
SHA-256: 2ae94b90cfb81ebc7099cd79605ae0b639748130aa129fde6fe6f107927ccc34

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