Malicious PDF — malware analysis report

Static analysis result for SHA-256 2985a47355407470…

MALICIOUS

PDF

73.5 KB Created: 2021-09-17 13:27:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 6e008d8bda0c99b8dd6e6d0da0e523cc SHA-1: f97883fa2f7378649831671957d3ae6d8c95cdc2 SHA-256: 2985a4735540747096dd5a03c73e17875b06fd08fbf9ccabb9bd3d78df290147
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was identified as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains a large number of embedded URLs, many of which point to disposable hosting and are used in a link farm pattern, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the overall structure strongly indicate a spearphishing attachment attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://garglob.ru/uplcv?utm_term=big+little+lies+movies123 PDF link annotation
    • http://musicpark-live.de/userfiles/file/dopovirogux.pdfIn PDF document text
    • http://cuboni.com/uploadfile/hong202109102306182551.pdfIn PDF document text
    • https://klcmekatronik.com/ckfinder/userfiles/files/2338465717.pdfIn PDF document text
    • https://ipssecurityconsultants.com/ckfinder/userfiles/files/ruzowiw.pdfIn PDF document text
    • https://dorfadvertising.com/ckfinder/userfiles/files/tonafosonibe.pdfIn PDF document text
    • https://spheresignal.com/app/webroot/userfiles/files/ligasewenofidisew.pdfIn PDF document text
    • https://cincia.ro/ckfinder/userfiles/files/35258720541.pdfIn PDF document text
    • http://diagcorlifescience.com/attachment/file/35837054972.pdfIn PDF document text
    • https://shastriratanchatterjee.com/ckfinder/userfiles/files/73602286169.pdfIn PDF document text
    • https://ladachess.ru/userfiles/file/23456340440.pdfIn PDF document text
    • http://tw-echen.com/uploads/files/202109130554526138.pdfIn PDF document text
    • http://gpp300.fr/userfiles/file/kamuxef.pdfIn PDF document text
    • https://insp.biz/img/file/30716848532.pdfIn PDF document text
    • http://loaamtran.com/files/usersfiles/files/53060772550.pdfIn PDF document text
    • http://louisamerino.com/userfiles/file/92060066351.pdfIn PDF document text
    • http://eco-building.cz/UserFiles/File/25905805286.pdfIn PDF document text
    • http://ristoranteibucanieri.it/userfiles/files/zoxuzi.pdfIn PDF document text
    • http://gyndoktors.de/ckfinder/userfiles/files/rofizexegor.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614046808904e---pivenesuwanonegozoxefig.pdfIn PDF document text
    • http://toshiteriyakiburien.com/uploads/files/3032175924.pdfIn PDF document text
    • http://ipublicity.cz/data/file/kebodegigogimujada.pdfIn PDF document text
    • http://cecev.com/stockages/files/wimowawap.pdfIn PDF document text
    • http://systempro.kr/userData/board/file/xazotabaz.pdfIn PDF document text
    • http://joyear.com/ckfinder/userfiles/files/nonumobaku.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_off0000ba1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA1B 10548 bytes
SHA-256: c297559a3a08ba0bd020e3bc7ed0c869860de409c3e5c9f9e1d6a5d411ca69fd
font_01_sfnt_off0000d258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD258 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ea6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA6A 18012 bytes
SHA-256: 71a2559541b2e35525a4801122f61f93bced8f95535e4b288f340ff63ffcb480

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