Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eba7acb08a21000…

MALICIOUS

PDF

91.2 KB Created: 2021-09-07 16:36:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: df6e82edc8a7b1803c61505be1f36bca SHA-1: 3820595ce32e76142f0a79297cdfdff990c7cd5f SHA-256: 2eba7acb08a21000278cd0a6ace2c3857449cdc4201c802a75023e95dffbceb7
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a large number of external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm for phishing. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites for credential harvesting or further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9921

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.
  • 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 https://medvor.ru/uplcv?utm_term=nunchaku+training+pdf PDF link annotation
    • https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/4035462930.pdfIn PDF document text
    • https://grandhotelbulgaria.com/userfiles/file/tuguwinujorosar.pdfIn PDF document text
    • https://aspirans.com/files/file/73143963122.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/tuzavabis.pdfIn PDF document text
    • https://ceccardolj.ro/userfiles/file/4602323025.pdfIn PDF document text
    • http://playonathletics.com/userfiles/file/xisobisid.pdfIn PDF document text
    • http://elturo.ru/img/upload/files/9488623425.pdfIn PDF document text
    • https://nstyapi.com/resimler/files/jasepufonuf.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d929532bd2---79117893216.pdfIn PDF document text
    • http://classicalgardenornaments.com/uplds/file/lobolobakuwuwapatutuj.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/9280cf5c3abf4dc3895a02bf42b5d766/69348800210.pdfIn PDF document text
    • http://sutphinsgermanshepherds.com/clients/21958/File/55158083580.pdfIn PDF document text
    • http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/160f4a3f641e05---gopeni.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607a961f4b33c---23918494497.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160761a4def89d---bazos.pdfIn PDF document text
    • http://chothuexehochiminh.com/userfiles/file/84888685636.pdfIn PDF document text
    • http://blow-w124.com/js/upload/files/debesutivugatupibaj.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/pjs67rtpk2017i71j1vgvrd1l4/49810014503.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/9410785253947dcf8a910deb6ad8d7dd/72257971048.pdfIn PDF document text
    • http://falerisztika.hu/tmp/sadixaravorizogu.pdfIn PDF document text
    • http://bannhuaduong.net/upload/files/99150228501.pdfIn PDF document text
    • http://architects-desk.com/uploadsfile/41722920071.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d79c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD79C 10604 bytes
SHA-256: 083373853fe8e971c167515c1f2c9c612a7171455cde2328ec5c54452afcc6e3
font_01_sfnt_off0000ef87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF87 16520 bytes
SHA-256: 442da60c71a4713333640297ea62355ed8ecc21e68fd182226ee425390801dea
font_02_sfnt_off00010693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10693 21532 bytes
SHA-256: 22060c1ca1c988c87f606d355ab7fd10437719e92dabcd45736ba5904efaefe4
font_03_sfnt_off00013db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DB9 1820 bytes
SHA-256: ef4c56b83544acc0eae329b123dcb13384a4443b8ee25b6b011fcec9f25c534c
font_04_sfnt_off00014643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14643 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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