Malicious PDF — malware analysis report

Static analysis result for SHA-256 eed2b0184e7834e4…

MALICIOUS

PDF

77.5 KB Created: 2021-09-20 13:36:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 936165970c287c45b32733854b3817cd SHA-1: 78cba89029901d29da81e286661d8a4f6ed09d2d SHA-256: eed2b0184e7834e402185467327c546a9d27e0f407f96fefe80b46ca58cf242f
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is flagged as malicious by ML classifiers and ClamAV. It also features a high number of external links, with one specifically identified as an algorithmically generated URL, suggesting a phishing or malware distribution attempt. The presence of embedded JavaScript indicates an attempt to execute malicious code within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • 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=virtual+dj+download+for+android
    • http://www.asiacoservice.com/file/files/29860233546.pdf
    • http://urgentcarepb.com/userfiles/file/roradogegab.pdf
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/161304d4c02dbb---77086746348.pdf
    • https://www.hotel-restaurant-plainfaing.fr/ckfinder/userfiles/files/46429722319.pdf
    • http://onestep-tokyo.com/userfiles/file/96858690013.pdf
    • http://lejuriste.ru/files/file/joxugofuk.pdf
    • http://wgadget.com/file_media/file_image/file/xadizosoderimavir.pdf
    • http://hockeydh.com/files/ups/files/bedepomiviranona.pdf
    • http://alfonsoguiggiarchitetto.it/userfiles/files/kugiza.pdf
    • http://ydtmuhendislik.com/ckfinder/userfiles/files/lidurudagapotipobevufod.pdf
    • http://lilit-realty.com/wp-content/plugins/super-forms/uploads/php/files/eud7e6evta6vkd5uof7r1hmug4/wisulupewunogidi.pdf
    • http://builderall.info/userfiles/file/11172932812.pdf
    • http://carraracucinecomponibilitrapani.it/userfiles/files/77770042639.pdf
    • http://salocchi.it/userfiles/files/99577772483.pdf
    • http://chokysitohang.com/Uploads/userfiles/files/wanipasuwaxa.pdf
    • http://cp-tournament.org/ckfinder/userfiles/files/vakewejebodasos.pdf
    • https://izometal.net/mm/file/xewexavaxe.pdf
    • http://asv-solnice.cz/_files/file/nawaz.pdf
    • http://nhabe.com.vn/ckfinder/userfiles/files/kuvikemaf.pdf
    • http://cainghienbinhduong.com/uploads/userfiles/file/80009728566.pdf
    • http://ventiliatoriai.lt/js/ckfinder/userfiles/files/74235508019.pdf
    • http://sun-apartments.pl/data/pages/52661861129.pdf
    • http://dgjinhak.kr/DATA/upload/files/202109160831229879.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • 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_off0000cc80.bin
c27fa250ee0701d8ea98282f7f55c5db80b1f050b4e733aff190b352b28e65b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC80 10332 bytes
font_01_sfnt_off0000e3dd.bin
d135588acf467803d3e3d99106f639a52386f438a4f240cd8798596ba05e03dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3DD 17256 bytes
font_02_sfnt_off00011033.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11033 16792 bytes

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