Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaaff6e75647e823…

MALICIOUS

PDF

79.1 KB Created: 2021-07-09 21:54:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 5f99085d0e5df4b932f95ed184b811b2 SHA-1: c8108634b614ef32af2279373883e4d2152ad7a8 SHA-256: eaaff6e75647e8235c43d95e426f7b48796bf952fa93db59ba6d457cc88fe8d8
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 a link farm pointing to multiple domains, many of which are associated with compromised WordPress sites or disposable hosting, suggesting an attempt to distribute malicious content or phish users. The embedded URLs and the nature of the heuristics strongly indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160aedf1a710ba---11440787913.pdf In PDF document text
    • http://raisemoneyonline.org/clients/6/69/691275cf9a36cab982b2498ebdc715be/File/61150533823.pdfIn PDF document text
    • https://menu2uplus.com/images/file/nimuvijabix.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16248970292006.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/160bec1af8c896---bowipaxedazoxikizokoxowe.pdfIn PDF document text
    • http://ayurveda-shiatsu-qigong-nice.com/upload/files/texikudunoxukavilagob.pdfIn PDF document text
    • http://www.nationaalgolfcongres.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16083cd3bb2ae7---xuzodanakoseg.pdfIn PDF document text
    • http://zulassungsservice4you.de/bilder/file/vokusujiz.pdfIn PDF document text
    • https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/jh7b8b3i5p4m5v24k6m67fps41/vevolemun.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1609751120695f---nizozezuwozira.pdfIn PDF document text
    • https://bykevin.com/wp-content/plugins/super-forms/uploads/php/files/c2b99aab574180e115fe0dfb46c1d430/xobalatalosomaz.pdfIn PDF document text
    • https://aquaprosmart.com/userfiles/files/gebako.pdfIn PDF document text
    • http://biometria.pl/photos_fck/file/jivebonapadufup.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/61mae15dmcjpgovcqlk8m95emd/76685599451.pdfIn PDF document text
    • http://claudiodauelsberg.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c1f85503470---xulexe.pdfIn PDF document text
    • http://pension-erlkoenig.de/img/editor/file/duwevololejenenekibi.pdfIn PDF document text
    • https://panegovernance.com/ourprojects/chowki/UserFiles/file/98626417412.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/21806907482.pdfIn PDF document text
    • http://vivatbacchus.hu/files/file/welaradukosirowux.pdfIn PDF document text
    • https://angkoronetour.com/userfiles/file/30269013279.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/1608397ce0f17a---somategike.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607e921110ebf---tixaz.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=how+to+put+your+address+on+a+letterPDF 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_off0000d333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD333 10584 bytes
SHA-256: bcd39be7146f04a5fc1cd72cb0764e7149b7fdc92d8f2a7b58baa8a60fcc28bf
font_01_sfnt_off0000eb93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB93 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000103a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103A5 16928 bytes
SHA-256: 29b5a4657d91a311de8c6d6afe15887f448af7c5be46e94967747aac5b83809a

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