Malicious PDF — malware analysis report

Static analysis result for SHA-256 200a50ca260e6c98…

MALICIOUS

PDF

84.0 KB Created: 2021-09-12 09:50:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 6c28c83b0bcfa083178562a31750a308 SHA-1: 194ebf36e0d58ca5579a17b7dd968ee1678b1c67 SHA-256: 200a50ca260e6c98e83dff6496d75ecf4a1a3168d6a7a883e45e6d2e252ffa97
184 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded JavaScript stream and the numerous external links, many pointing to compromised WordPress sites, suggest it is designed to lure users into downloading a secondary payload. The document impersonates a cloud file-sharing service, a common tactic for phishing and malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

Heuristics 8

  • 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.
  • Cloud document impersonation lure medium SE_CLOUD_DOC_LURE
    Document impersonates a cloud file-sharing service such as SharePoint, OneDrive, Google Drive, Dropbox, Box, or Microsoft 365 and asks the user to open, verify, or access a shared document
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b647da3687---60080854731.pdf In PDF document text
    • https://trichynext.com/wp-content/plugins/super-forms/uploads/php/files/f54338815ee78cbf30cd76b144542b0f/74534774683.pdfIn PDF document text
    • http://jsqnchem.com/upload/files/31676087046.pdfIn PDF document text
    • http://ibshop.gr/uploads/_uploads/files/mowufusuruwurupezil.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/15314834055.pdfIn PDF document text
    • http://www.mananthavadynorbertines.org/www/js/ckfinder/userfiles/files/15848979914.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/5f6179c5de874348f130f3fc8f5dce77/37680954067.pdfIn PDF document text
    • http://exito-opakowania.pl/userfiles/file/tibagudoninawafedepesik.pdfIn PDF document text
    • http://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/16137760c136a2---87658643551.pdfIn PDF document text
    • http://cnex.cc/images/blog/file/83613231251.pdfIn PDF document text
    • https://angkortaxiservice.com/userfiles/file/46443730697.pdfIn PDF document text
    • http://egitara.com/upfiles/files/29488323159.pdfIn PDF document text
    • https://www.kindspring.org/inc/ckfinder/userfiles/files/zilovarazupilubisig.pdfIn PDF document text
    • http://home-plast.ru/foto/files/27692304930.pdfIn PDF document text
    • http://ks4073.com/file_media/file_image/file/5579458248.pdfIn PDF document text
    • https://lemonsport.sk/upload/file/82155180463.pdfIn PDF document text
    • https://brawlcall.jordanadams.com/ckfinder/userfiles/files/xawedidurokobedi.pdfIn PDF document text
    • http://cokhilegia.com/upload/files/78014844190.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613b34d41dd8e---pusupotobipalenipi.pdfIn PDF document text
    • http://psychanalyste-gard.fr/ckfinder/userfiles/files/torerujobalawezedigoloru.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/30f6701f5bfbfa34744307ea25834d33/55662805178.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/45670647662.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=android+storage+is+fullPDF link annotation
    • https://cakamuzejs.riga.lv/ckfinder/userfiles/files/jazivinikerederagamef.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_off0000e4b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B6 17668 bytes
SHA-256: 36b29a6439d55f02c4757709559692e77f981a4bc624d0059f3e7ac590b0a7db
font_01_sfnt_off00011264.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11264 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012a7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A7B 10612 bytes
SHA-256: d4d679d29cda1373aaccff644cc2adbb2499b203dcc095d975555691a6363cb2

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