Malicious PDF — malware analysis report

Static analysis result for SHA-256 e49eda00ff5c4ebd…

MALICIOUS

PDF

80.4 KB Created: 2021-09-22 13:15:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: ef7c3e14b6e4c4e20be79022e240a97b SHA-1: eb42df9075f6026b0b25b62b836687334ac09d66 SHA-256: e49eda00ff5c4ebd0f51cea02af6541636a7354e62cb820772f97287cd0195f1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to external websites, many of which are hosted on compromised or disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 https://medvor.ru/uplcv?utm_term=play+store+not+installing+apps+download+pending PDF link annotation
    • http://serviphony.com/tinymce/jscripts/tiny_mce/plugins/phpimage/phpimage/upload/images/file/bekiwawo.pdfIn PDF document text
    • https://pinpointfeedtech.com/ckfinder/userfiles/files/foladesewetedowixij.pdfIn PDF document text
    • http://anonelectronics.com/admin/fckeditor/editor/filemanager/connectors/php/upload_jpg/file/202109121551062759.pdfIn PDF document text
    • https://www.supremecaravans.com.au/application/third_party/ckfinder/userfiles/files/39632168770.pdfIn PDF document text
    • http://indiebookoftheday.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132bfa19f860---gifudetajuzukubunolun.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613633a053fc2---68869397677.pdfIn PDF document text
    • http://kevinmcallisterlaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/28278492361.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/50312340296.pdfIn PDF document text
    • http://danguykhoidoanhnghiephp.vn/Upload/files/sopumugomefilugukivalaf.pdfIn PDF document text
    • https://alasclub.gr/neuro/ckfinder/userfiles/files/vafujisigepeminoj.pdfIn PDF document text
    • http://finproekt-msk.ru/userfiles/file/41205782869.pdfIn PDF document text
    • http://hocikto.info/userfiles/file/vidawifukizuxokil.pdfIn PDF document text
    • https://tonicsuitemusic.com/userfiles/files/40892282172.pdfIn PDF document text
    • http://collectifff.be/imgdb/accueil/files/47540902680.pdfIn PDF document text
    • http://saeronbio.com/userData/board/file/73111354111.pdfIn PDF document text
    • http://vatlieubaooncachnhiet.com/userfiles/file/99240124538.pdfIn PDF document text
    • https://tuinvandecruys.be/file/11074993184.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/kixidogijozoga.pdfIn PDF document text
    • https://www.hadlowsecurityshutters.com/wp-content/plugins/super-forms/uploads/php/files/0755d01a868c36998808f29ecb987706/lemanag.pdfIn PDF document text
    • http://chiaranannini.com/userfiles/files/86904881079.pdfIn PDF document text
    • https://netwindowvn.com/uploads/userfiles/file/69967392988.pdfIn PDF document text
    • http://diversecityuk.com/userfiles/file/nefuvo.pdfIn PDF document text
    • http://podlahypilat.cz/admin/file/59861396299.pdfIn PDF document text
    • https://gotoko.com/cmsv2/upload/files/97847220593.pdfIn PDF document text
    • https://m-audio.vn/img-m-audio/files/43879939021.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_off0000d699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD699 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eeb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB0 10768 bytes
SHA-256: 87b5af90e341bc5b1f69481bdca32901c67b2cb06044c31c70f71f5ef286507d
font_02_sfnt_off0001077c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1077C 17072 bytes
SHA-256: 42812b27d02edcd1a40e084b2ba0131f988513ee8ec45b298e368ae74222b04e

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