Malicious PDF — malware analysis report

Static analysis result for SHA-256 0392af3205d1ec2b…

MALICIOUS

PDF

80.3 KB Created: 2021-07-01 00:18:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 1217c764c136b3742897ad62ca709603 SHA-1: b08c51aa238455af7556f5ce8edb155b1c19634a SHA-256: 0392af3205d1ec2b2e0dcc7c7fe1d6009da6fe318bb41e622da597abe8748263
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier strongly indicate a phishing or trojan payload delivery. No scripts were extracted, but the structure and URL patterns are indicative of a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://coretry.ru/uplcv?utm_term=anna+olson+chocolate+mousse PDF link annotation
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/362b900854c8a47c6fda2792459d05b6/velobowime.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/9da145c5593a6f1f5fb3525d4d37bc28/rigamafupumusitofupavix.pdfIn PDF document text
    • https://orangerun.re/photo/files/44348529675.pdfIn PDF document text
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/q3uaftiqn2of0ng3fga7uc9kp6/tululepogejenera.pdfIn PDF document text
    • http://sooclose.eu/upload/File/10108407069.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ac8564b3939---temesukoxil.pdfIn PDF document text
    • http://sy-smile.com/upload/files/12154317522.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/7ucoj78eu600b43p48f7enesc0/98901619496.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/db3be75756769fb304c33cd8cd5e8162/16459922695.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160c6674418ed1---80463201766.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/51482306881.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160b891a39ed24---dexusijagigutoja.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ca135231c85---rozagepepejinofekasu.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a484288b489---57087536203.pdfIn PDF document text
    • http://businessdevelopmentcenter.pl/uploads/userfiles/files/50600711092.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a119aa29651---potogolubexuguzov.pdfIn PDF document text
    • http://carszana.com/image/upload/File/67308020217.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/875f5cd92f83a69a5185c2d8ba1e4083/xoziteloraf.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/95818099702.pdfIn PDF document text
    • http://ebiocell.com/uploadfile/file///2021063001002061.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/45651016151.pdfIn PDF document text
    • http://exmar.it/foto_fck/file/82970716497.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000bbf9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBBF9 16876 bytes
SHA-256: ba46b975fb30f2000e551fc0e3a1d4d2b0fd9db6ae33b0fe7676d24a7781350e
font_01_sfnt_off0000e7bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ffd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFD3 10384 bytes
SHA-256: 9a90e1c28ac7f6c5e7a155bf5ca4054fbc5c117f164d608d06c3cea89e99dc7d
font_03_sfnt_off00011736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11736 18072 bytes
SHA-256: 41730f77b630479012999badcdf086f26623ce920c54ad65e4a8179f1ab24fdb

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