Malicious PDF — malware analysis report

Static analysis result for SHA-256 d47e6bb270db6132…

MALICIOUS

PDF

81.9 KB Created: 2021-09-15 22:53:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 3de0be0c3f06027003eb17cace57a57d SHA-1: 2fb024caaa5a112da1ec3864dedc65805ed96354 SHA-256: d47e6bb270db61324933df4f237a50c31fb678e4cd7d13d223fb66070bc4819e
164 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS uploads or disposable hosting, characteristic of a link farm used for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing trojan. The presence of external URIs and link farms suggests an attempt to direct users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://bbmeti.it/userfiles/files/xinasagefibokuwomixizitum.pdf In PDF document text
    • http://tolaniprojects.com/userfiles/file/fijilipopivesozajaz.pdfIn PDF document text
    • https://manajrgvaaradhi.com/cms-uploads/files/mojijipototimasone.pdfIn PDF document text
    • https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/161413a40b5df0---xizadaxuwesilumum.pdfIn PDF document text
    • https://ev-owners.jp/userfiles/files/29798419011.pdfIn PDF document text
    • http://alfadent-volg.ru/images_uploads/files/detalig.pdfIn PDF document text
    • http://spain-ex.com/images/blog/file/16721548900.pdfIn PDF document text
    • http://erex.hu/upload/file/83687013435.pdfIn PDF document text
    • https://myagenda.myagenda.cz/pictures/editor/files/sulinu.pdfIn PDF document text
    • http://ssatripoli.org/userfiles/file/38568643645.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/94a0e17ab06231ef59dab1d301ee4715/dabigafule.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/161366924b7cf1---rikejapuxiziw.pdfIn PDF document text
    • https://gangnampools.com/contents/files/nisiwizeze.pdfIn PDF document text
    • http://vasset.bg/userfiles/file/fasezok.pdfIn PDF document text
    • https://fiscalonline.eu/app/webroot/files/userfiles/files/15079069486.pdfIn PDF document text
    • http://kawana.tech/userfiles/file/worifogixe.pdfIn PDF document text
    • https://onecre.com/images/content/files/73319527253.pdfIn PDF document text
    • http://word.mn/uploads/assets/58617277791.pdfIn PDF document text
    • http://paroissedementon.fr/upload/files/luroladawijasirewafaf.pdfIn PDF document text
    • http://ranchobg.com/img/file/nufusukaz.pdfIn PDF document text
    • http://shacklefordlawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/37788355972.pdfIn PDF document text
    • http://lnhaihui.com/userfiles/file/20210907034733_299074428.pdfIn PDF document text
    • http://royalwedding.jp/images/blog/file/67383719742.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=tv+prime+plus+for+androidPDF 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_off0000d8cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8CC 10688 bytes
SHA-256: b2ae35c18a8cdea3d7bb817fa37879ca90295a3c78187b8b45917093564e2f06
font_01_sfnt_off0000f148.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF148 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001095a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1095A 19096 bytes
SHA-256: 45ac815ad4eb9bfdced5cc4548b47279436c53a122202c0f39978397e930bdb3

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