Malicious PDF — malware analysis report

Static analysis result for SHA-256 02f2cc86502e93b2…

MALICIOUS

PDF

79.3 KB Created: 2021-09-17 09:08:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: aec21a0873698dd1ac6f46e78f50fb27 SHA-1: f179972aa01b03ba04cb1789e9e78e3eefdb4421 SHA-256: 02f2cc86502e93b2faca1bce98e35ccc5e3930a2bddd4714ed614efeed18d7b0
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and heuristics indicate it contains external URIs and a URI pointing to a raw IP address. The PDF structure suggests it acts as a link farm, with numerous embedded URLs designed to redirect users to potentially malicious sites. While no scripts were explicitly extracted, the nature of the PDF and its embedded links strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://gnatowski.pl/attachments/file/50209154721.pdf
    • https://amrapalispot.com/userfiles/file/lovofizurulosud.pdf
    • https://escritacontabilidade.net/fotos/news/file/7938170830.pdf
    • http://c2r-auto.com/uploadfiles/file/2021091701260173499.pdf
    • http://185.33.116.142/~bbyacht01/upload/files/pezava.pdf
    • http://www.barbazan-debat.fr/ckfinder/userfiles/files/xizifiwixarejif.pdf
    • http://tieulongcopro.com/luutru/files/mazewanedolotonofu.pdf
    • http://hanabi-la.com/uploads/files/89583393557.pdf
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/161440f6fb6764---vewifumuj.pdf
    • https://xn----7sbbg1ddpkdc.xn--j1amh/uploads/files/kewakejalewera.pdf
    • http://bacvietexpress.com/upload/userfiles/files/9551563294.pdf
    • https://ojazzdance.fr/userfiles/file/30167544179.pdf
    • https://apoiotelecom.com/imagens/img_fckeditor/file/25386119383.pdf
    • https://csp-pub.com/stockages/files/28814293301.pdf
    • http://gptools.net/userfiles/file/tesubakuz.pdf
    • https://sv-fin.ru/wp-content/plugins/super-forms/uploads/php/files/c1f7cb93d08603bca442e207c614debc/91853797389.pdf
    • http://srtcivilnorth.com/ckeditor_file/files/50531467340.pdf
    • https://nikolsbeauty.com/webroot/f/uploads/file/bumopesasatezukugon.pdf
    • https://fullgame.hu/uploads/files/35492196072.pdf
    • http://droneducational.com/admin/userfiles/file/84414742625.pdf
    • http://artetendasud.it/userfiles/files/dakipawomixujiw.pdf
    • http://massarentearchitettura.com/userfiles/files/jufiteje.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=friv+2017+unblocked
    • 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_off0000ca6c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA6C 16792 bytes
font_01_sfnt_off0000e283.bin
8e90e491028b3b023573d641c19872db1ff6c112690676b8c6e2a82608ad24b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE283 10652 bytes
font_02_sfnt_off0000fb05.bin
8cbc30e029877898039a05e2f480fea0557a7bc0c106150322863e53fce362b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB05 20192 bytes

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