Malicious PDF — malware analysis report

Static analysis result for SHA-256 95970f078ff0b42a…

MALICIOUS

PDF

85.6 KB Created: 2021-06-27 21:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: eecf1ccbd16b06f2b8ce2bb257264235 SHA-1: e2ca7dd9ac776cf11370f82c8c51d4413dfe5cb5 SHA-256: 95970f078ff0b42afd6da833898048d5b2fa8917c670515f271be73e0f603850
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a malicious PDF, as indicated by ClamAV detection and ML classification. It contains numerous links to external URLs, many of which point to compromised CMS uploads or disposable hosting, suggesting a link farm designed to redirect users. The presence of PDF_RANDOM_URL_LINK and PDF_SEO_DISPOSABLE_LINK_FARM heuristics strongly indicates a malicious intent to lead users to potentially harmful content or further stages of an attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://eltonltd.ru/sites/default/files/uploads/jurik.pdf
    • https://diversified-nj.com/wp-content/plugins/super-forms/uploads/php/files/dcc1762480a609ec927e38f2955b97ac/43371602367.pdf
    • https://discovercefalu.com/_data/images/file/79922900049.pdf
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090f6a6c0b72---jowololosejakojipirijatox.pdf
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92318e49a---risurutazojo.pdf
    • http://sl-light.ru/design/img/upload/file/wijivifid.pdf
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/2c7c83639011403f6d6bbf94cbf03c4a/71283066474.pdf
    • https://alexandrapanayotou.com/web/images/static/file/30365154568.pdf
    • https://arvikabc.com/images/uploadedimages/file/85172559455.pdf
    • https://afriqueitnews.com/wp-content/plugins/super-forms/uploads/php/files/72eb6e4df51e24190666d4ca7209ff12/levikimoli.pdf
    • http://wojno-stal.pl/pliki/file/dopumuvuzawi.pdf
    • http://lucidareemantenerepavimentifaidate.it/userfiles/files/fesulazosegufe.pdf
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607bf27fde335---93415749080.pdf
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/770e9003a9b4090066280ad2fa59682e/57861289291.pdf
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/160b13c60d3a45---61453807278.pdf
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a55084e3c81.pdf
    • http://ptairsupply.com/userfiles/file/lejoxetenoluse.pdf
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfe04059b63---85587045143.pdf
    • http://akbmodel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b757a6f0689---detojuberalinebo.pdf
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794afc1d902---5054617932.pdf
    • http://ankurgroups.com/userfiles/file/watofawolej.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c19b6d2f372---75539903056.pdf
    • http://mea-travel.pl/userfiles/file/buvibebinarisixivir.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=stick+war+legacy+how+to+get+unlimited+gems
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • https://bit.ly/381XguVStick
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e5b1.bin
3e485c2a400aad15b9be24609307feb5a4c164a7b20a77a785098854e73b71f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE5B1 11284 bytes
font_01_sfnt_off0000ffdf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFDF 16792 bytes
font_02_sfnt_off000117f1.bin
f622861f17a317a541ceb8a0769c215e5f6e71c1913cbe06fae0fc49dfae3d13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117F1 17784 bytes

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