Malicious PDF — malware analysis report

Static analysis result for SHA-256 f06a9aa6545149e6…

MALICIOUS

PDF

96.1 KB Created: 2021-07-19 11:13:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 8e7908972d399a3462feeee72df87675 SHA-1: 55724589a5461776cca0f570a7cbd0e53c2c1488 SHA-256: f06a9aa6545149e6394525e86a477237fb93878a27b57764fd73bde7e181a53b
156 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload directories and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The file's structure and the presence of multiple external URIs indicate an attempt to lure users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9853

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://ibiforstarlight.ca/clients/3/3c/3cfcca4e360ca8807b7dd7d6e7cbeae0/File/27672350267.pdf In PDF document text
    • http://flgr.ru/files/files/topodewinupukiwezof.pdfIn PDF document text
    • http://www.communityheroesproject.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c84e9c68678---jalujavepo.pdfIn PDF document text
    • https://dermo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608415f74de40---30197822582.pdfIn PDF document text
    • http://tks-forever.com/upload/2021/06/24/file/33915767144.pdfIn PDF document text
    • http://poorclarescork.ie/images/68682997670.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ad87a13be14---vijinene.pdfIn PDF document text
    • http://bangkoksolarpower.com/syner_upload/images/files/luzisumenajibud.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160f498c1e943a---23284879684.pdfIn PDF document text
    • https://candbco.com/ckfinder/userfiles/files/tunifenegemogapifij.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160e1776478ba7---fudukufamuvemi.pdfIn PDF document text
    • https://civilkontroll.hu/uploads/file/gudefufuxamebebi.pdfIn PDF document text
    • http://stkvn.ru/wp-content/plugins/super-forms/uploads/php/files/46391d090cd2c346cf6dc3e4b87c8381/tojenojosuvilumere.pdfIn PDF document text
    • http://cambridgekapurthala.com/damana/userfiles/file/11205618057.pdfIn PDF document text
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/13155391148.pdfIn PDF document text
    • http://xigmatek.com/upload/files/13825792444.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a10bb201b1c---zajavotowokunixa.pdfIn PDF document text
    • https://louvre.lv/res/wysiwyg/file/zodegorowopituzuro.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16074900381ad5---kazudewegetugiwotagogugi.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/mevajaguvobupikabid.pdfIn PDF document text
    • https://aquamedicasatumare.ro/ckfinder/userfiles/files/3114608309.pdfIn PDF document text
    • http://kubabus.cz/novy-web/upload/file/15072008357.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/a966o7m3od815063sp8o7qfkj7/segetukakagimu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=double+hammer+beam+roofPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00010044.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x10044 17280 bytes
SHA-256: 0afb38007e9c177231b62f4c72c046379f0a66c760a110af02a59e7dbe9a15f3
font_00_sfnt_off0000e948.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE948 10256 bytes
SHA-256: bf8b98c98fe2cb6e828516201c737e14bc22dd8f098369eba38364048eaddc00
font_02_sfnt_off00011a2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A2B 20556 bytes
SHA-256: 3dd253c1450f56522e1b18528542eff9d708ce416c0629d2b13bef7b9156fa4d
font_03_sfnt_off00014ee3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EE3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off000166f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166F0 2648 bytes
SHA-256: 5f958d8c9d55fb1f35d009e22357d98b5d3cbb9783ab67193af1f4fa3a314ff7

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