Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e8bcdd04569ad82…

MALICIOUS

PDF

84.7 KB Created: 2021-09-04 09:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 0a499b99ece7124be53bcb456bfbb961 SHA-1: fa7f2ccdf015a5ac5f715c7c4e953589f39d4073 SHA-256: 8e8bcdd04569ad825b4fbfe604f0ea693268693c3ade4964f3258a6326f9e84d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to numerous external URLs hosted on compromised or disposable domains, suggesting an attempt to redirect users to malicious content. The PDF structure and embedded URLs indicate a likely phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://suacona.com/clients/16856/File/9127295384.pdf In PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16073e2d342437---rajupet.pdfIn PDF document text
    • http://eakqshop.com/ckfinder/images_store/files/tiwuxifedexubixir.pdfIn PDF document text
    • http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160d26cc541124---renewovevujoxiwafotebawax.pdfIn PDF document text
    • http://balassalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fojamupagerifi.pdfIn PDF document text
    • https://ancoraeducacion.com/images/buwowupusovipu.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/36404098424.pdfIn PDF document text
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1610b5a75b2e8b---tevogepibegu.pdfIn PDF document text
    • http://jp-cable.com/d/files/16772160753.pdfIn PDF document text
    • http://taihegas.com/filespath/files/20210829045520.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e0c155583d---mosegifufidalazo.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/i2sickaamgl6vie8b2mvh5vt57/tilawimakanodurivi.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16087ed189cf3f---rumefibitupi.pdfIn PDF document text
    • http://wildzipper.com/clients/wildzipper/userfiles/file/detepu.pdfIn PDF document text
    • https://doellefjelde-mussemarked.dk/images/newsmail/file/gipomon.pdfIn PDF document text
    • http://www.vlaamspatientenplatform.be/_plugin/ckfinder/userfiles/files/42692552498.pdfIn PDF document text
    • http://albino-pitti.com/pub_img/file/meborigolixazem.pdfIn PDF document text
    • http://huile-de-nigelle.info/userfiles/file/jolitarem.pdfIn PDF document text
    • https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/0f12b4695b6d73984afb618ccadadec4/8202768927.pdfIn PDF document text
    • http://srub-servis.ru/userfiles/file/gijelu.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fc545b463---36895587353.pdfIn PDF document text
    • http://www.training4thefuture.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a3ee926a93c---69850615239.pdfIn PDF document text
    • http://rhondachem.com/d/files/nenuda.pdfIn PDF document text
    • https://themodernla.com/wp-content/plugins/super-forms/uploads/php/files/edd97a18ba2c0ed297966370271aacee/24397432937.pdfIn PDF document text
    • https://fishboat.hr/files/tasigekubovibagakaxipogon.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/YTWXjIUwRh0/uplcv?utm_term=area+of+all+shapes+pdfPDF 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_off0000e777.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE777 18012 bytes
SHA-256: cd5388d622b04dd15c5b2b1443b0188ab9fca240edeb0a11f25e12ac5069d25a
font_01_sfnt_off00011630.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11630 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012e47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E47 10280 bytes
SHA-256: 1d7ac93354677be8b5c4ccf31cd073ddac94d10ddea76cc2eeed1e831b224d1c

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