Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecb9fee78d978e58…

MALICIOUS

PDF

77.8 KB Created: 2021-09-27 18:57:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f50e5b0d87c9b9400ce7916b2c83fc0a SHA-1: d8fb60675ea30e06d2b2b783251336aab4b22d9f SHA-256: ecb9fee78d978e58bdb5be4d9529cc6f907a531484b41baefa420707dc521e01
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external URIs and is flagged as a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of embedded URLs and the nature of the heuristics point towards a phishing lure disguised as a game download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crysiq.ru/uplcv?utm_term=papa%27s+burgeria+to+go+free+download
    • https://thuanxuongmonmb.com/admin/webroot/upload/image/files/fuluvuwe.pdf
    • https://arvikabc.com/images/uploadedimages/file/bigofateduxasavukev.pdf
    • http://energy-labels.com/userfiles/file/36656924083.pdf
    • http://rickgrisolia.com/userfiles/files/totupalu.pdf
    • https://autoteam.in/ckfinder/userfiles/files/25008229188.pdf
    • http://cpghollywood.com/userfiles/files/74612963718.pdf
    • https://bangvetthuong.com/luutru/files/wasalisixixasimufuzu.pdf
    • https://xosobacninh.vn/webroot/img/files/39775156490.pdf
    • http://capableapp.com/uploads/files/85298174096.pdf
    • https://banktapeunadana.com/tapeunadana/bank2/admin/userfiles/file/jofebijulajomupow.pdf
    • http://balbu.hu/uploads/news/file/38431817310.pdf
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/xafevegupubij.pdf
    • http://avtrak.ru/ckfinder/userfiles/files/74053086551.pdf
    • https://braindevelopmentmaps-org.neurondevelopment.org/userfiles/files/nesadavonifuwuzogemonote.pdf
    • https://hardlineconstruct.ro/app/webroot/files/userfiles/files/53486839391.pdf
    • http://willajarmar.pl/userfiles/file/tapigivonuvewudugali.pdf
    • https://anukulagrotech.com/userfiles/file/mevofawarebabigojej.pdf
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/naxijoximajefeboguzotaro.pdf
    • http://irina-beha.com/ckfinder/userfiles/files/jerulo.pdf
    • http://regimhotelierbucuresti.com/images/userfiles/pebotewabopes.pdf
    • http://smart.sut.ac.th/tsme/src/lib/ckfinder/userfiles/files/vukewogokodufijabu.pdf
    • https://kolbandibileklik.com/resimler/files/zaseguwagi.pdf
    • https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614df433ee344---26303365262.pdf
    • http://www.medic-pneumolog.ro/fisiere/file/xorolawewogev.pdf
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bcc4098eb2---fajosinarazajabo.pdf
    • http://lighthouse-connection.at/myPix/file/21454415333.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_off0000c444.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC444 16792 bytes
font_01_sfnt_off0000dc56.bin
83cdffb9ac15ebf6471def7bb8d89ada2f21fead5fc8e1d83561719562d4730c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDC56 19544 bytes
font_02_sfnt_off00010f58.bin
098650041074280ba29c5e0a83f0d67a4d7a39d33495e89150cd8f7b9c76471c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F58 11036 bytes

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