Malicious PDF — malware analysis report

Static analysis result for SHA-256 59b5a273eb9da94c…

MALICIOUS

PDF

68.3 KB Created: 2021-09-19 12:21:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d0d3afcd3ca7119fdd2ebba27eae83ec SHA-1: 433ba358305e24c51ebd687790603aa3bd518627 SHA-256: 59b5a273eb9da94c91b82d9a50ae8081b0a74cd55260a42150e130ed845ee354
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-only content, typical of a screenshot designed to trick users into clicking embedded links. Multiple heuristics indicate the document contains a link farm pointing to potentially compromised CMS uploads and disposable hosting, suggesting an attempt to distribute malicious content or phish credentials. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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 https://synerhu.ru/uplcv?utm_term=what+can+you+make+with+mushrooms+in+minecraft PDF link annotation
    • https://safecampus.in/cmsCart/upload/file/zawavaxiginajafelomefoz.pdfIn PDF document text
    • https://openkomm.yussfone-crm.com/userfiles/file/tevekapavir.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/18749596756.pdfIn PDF document text
    • https://quanticabtl.com/cms_2018_quantica/sgi_userfiles/userfiles/files/lonuvuzib.pdfIn PDF document text
    • http://madmojo.com/fckupload/file/gaduwogu.pdfIn PDF document text
    • http://sanzmendia.com/userfiles/files/97395528820.pdfIn PDF document text
    • http://engroupe.ca/aym_image/files/maxigotidipizaj.pdfIn PDF document text
    • http://incomsistema.ru/ckfinder/userfiles/files/nakugisujekudegigituzu.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613fd85286b5e---garetejuruvofadafat.pdfIn PDF document text
    • https://ingatlanfelugyelet.hu/uploads/file/ludegekuw.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/3498e018098539fab560e7020694a7cd/resubonijobek.pdfIn PDF document text
    • https://ihappywash.com/uploads/files/202109160208322285.pdfIn PDF document text
    • https://jensbrode.de/files/file/4528799097.pdfIn PDF document text
    • http://kraemer-duennebacke.de/files/file/mizupuv.pdfIn PDF document text
    • http://ebonit.light.bg/includes/libs/ckfinder/userfiles/files/dusegopodipiliv.pdfIn PDF document text
    • http://studiosantese.eu/userfiles/files/51595599622.pdfIn PDF document text
    • http://fk-fudosan.1nino3.com/app/webroot/img/userfiles/files/55458660595.pdfIn PDF document text
    • http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16136c3532ae65---kixiwowezes.pdfIn PDF document text
    • https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/30998655743.pdfIn PDF document text
    • http://fzcce.com/aimgs/uload/files/xebikidamoxesezowajubob.pdfIn PDF document text
    • https://www.ruchya.com.tw/upload/files/95781323723.pdfIn PDF document text
    • https://abogadosaccidentealicante.centralcms.cloud/galeria/files/83379542093.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/deqrnckjdmequli3b1srhumbk2/kevapadinizamobimenagim.pdfIn PDF document text
    • https://www.luxboss.com/ckfinder/userfiles/files/30834576064.pdfIn PDF document text
    • 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_off0000b05b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB05B 13868 bytes
SHA-256: 60d7137510a1c6f428a5047b9529e7dd6df11c83533a4ff892bc1cb432d2590a
font_01_sfnt_off0000d23f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD23F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA56 10940 bytes
SHA-256: 39dcf51406a547646ec56c5db361af6e0c7007c35dd28569b3d9c2a3ca9bd79b

Open this report in the interactive analyzer, or submit your own file for analysis.