Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ade9796d08bcb7c…

MALICIOUS

PDF

76.8 KB Created: 2021-09-15 23:01:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c06e802b9febb16fbd82690572c38ef9 SHA-1: 9fe388f62767baf300a90ffc88a26d454351063e SHA-256: 6ade9796d08bcb7c12eb5cfd4f6aaa8974519acaba58b6ab6f1ac61b20b2b593
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, suggesting an attempt to distribute or redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly indicates a malicious intent to obscure the true destination or to host a large number of redirectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://wastran.ru/uplcv?utm_term=download+gta+san+andreas+ocean+apk
    • http://studiodabo.eu/userfiles/files/xitirazotedaj.pdf
    • http://rulife.ru/ckfinder/userfiles/files/24868842354.pdf
    • https://leo.tw/upload/ckeditor/files/wejel.pdf
    • https://ecpa.fr/uploaded/file/56791348977.pdf
    • http://broadgatecapital.com/userfiles/file/jijimakarodumaka.pdf
    • http://odontotecnicacoop.it/userfiles/file/zexefisesa.pdf
    • https://xyoaa.org/sites/default/files/files/11517221229.pdf
    • https://people11people.com/uploads/File/topozopilamelanaxegonolub.pdf
    • http://dorinhawear.com/admin/fckeditor/editor/filemanager/connectors/php/fckeditor/editor/filemanager/connectors/php/userfiles/file/minawejevigiro.pdf
    • http://codienlanhtrangia.com/Images_upload/files/gafilalubajuforanet.pdf
    • https://mercerapparelss.com/userfiles/files/67005597572.pdf
    • https://excellencetogether.com/img/files/file/siwiworixejemadiguwabo.pdf
    • https://coonvalleycc.com/userfiles/file/kekedeporamuzuzisar.pdf
    • http://5m-tti.com/uploads/image/files/92504101291.pdf
    • http://www.hgbehringer.de/img/files/files/41264217335.pdf
    • http://bibrka-school.org.ua/ckfinder/userfiles/files/leniderofeloloragetu.pdf
    • http://kavernoklub.com/campannas/file/jobufiwigapizobusugowotur.pdf
    • http://www.jysunshine-hotel.com/up_files/file/toxuveburixasuponurodu.pdf
    • https://tenfci.org/userfiles/file/banumaxabirafazen.pdf
    • https://hitourkorea.com/FileData/ckfinder/files/20210904_15BD8E441CC98138.pdf
    • http://hrampetraipavlavosstanovlenie.ru/content/images/user/file/30024868203.pdf
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/16140d9b704f20---tefetupe.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_off0000c78a.bin
88ee79b0b17bc93a7cd7d9cc7fbf2f710692c0b3f5d4edbf820db03a01157058		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC78A 10776 bytes
font_01_sfnt_off0000e061.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE061 16792 bytes
font_02_sfnt_off0000f873.bin
c0739ef08e65ecda78ef20639f7725e0cc334c2419fcb66e2ff76cf894b14586		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF873 17320 bytes

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