Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3226adc40309b82…

MALICIOUS

PDF

86.8 KB Created: 2021-08-31 10:11:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f1228a37a78186a29025f10887cd87f4 SHA-1: b3f4064a4cf3e2305c1cfd470addb2407153e10d SHA-256: b3226adc40309b82a0d994954d66544cd5938daa9c183de0ecb0ec1dbb9af15b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to potentially compromised or disposable domains, suggesting a link farm designed to trick users into downloading files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9912

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ysmenmidwestindia.org/uploads/userfiles/file/file/15401107520.pdf In PDF document text
    • http://youngshiny.com/userfiles/file/1622831057.pdfIn PDF document text
    • http://apsons.eu/files/file/90917574601.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///2650696805.pdfIn PDF document text
    • https://snabavto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160888e0edc739---84039179157.pdfIn PDF document text
    • http://mastersequipments.com/ckfinder/userfiles/files/77588173401.pdfIn PDF document text
    • http://veitali.com/upload/files/jadixojemanifi.pdfIn PDF document text
    • http://benardoutlite.com/admin/fckeditor/fckdata/file/71058141774.pdfIn PDF document text
    • https://ipcare.nl/wp-content/plugins/super-forms/uploads/php/files/n3l1ir6krd515unc3rgil5ofcs/89836030780.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/xopujiwasisavedevaku.pdfIn PDF document text
    • https://kme.pl/global/app/webroot/uploads/file/16249239965765.pdfIn PDF document text
    • http://ixtvs.de/_upload_bilder/_filemanager/file/97954021423.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/6s171aaflet7b55u21p9j29n72/81814012163.pdfIn PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/7eekhgcl2n410pcvsgdh8nk530/wojuzowoz.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/70744778907.pdfIn PDF document text
    • http://newgatedesign.com/Images_upload/files/41772318621.pdfIn PDF document text
    • https://www.kbstephens.com/wp-content/plugins/super-forms/uploads/php/files/cad964ae40af1c1f224cae179b701d22/53251191289.pdfIn PDF document text
    • https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cc298e5bc06---rexowiwenamidog.pdfIn PDF document text
    • http://dancedynamicsla.com/clients/38740/File/gagoxogitagukoxi.pdfIn PDF document text
    • http://waypl.pl/upload/File/23818615452.pdfIn PDF document text
    • https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/c901b764623b1a5748df8c468d75756d/7043051396.pdfIn PDF document text
    • http://brickchamber.com/ckfinder/userfiles/files/83653184764.pdfIn PDF document text
    • https://comesa.com.pe/wp-content/plugins/super-forms/uploads/php/files/ljhh22m8m81ibo42funknoove1/jifemisa.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/fesanagiwadit.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160d20d7ad99f4---94363233639.pdfIn PDF document text
    • http://cnsgawefgl.netsociality.com/upload/files/wawosovodiwuluraxe.pdfIn PDF document text
    • https://traveltokiev.com/wp-content/plugins/super-forms/uploads/php/files/3kt0ajqvp1cal8cgspt992cph6/nezumifanexopirujexilo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=ffmpeg+avi+to+mp4PDF link annotation
    • 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_off0000e541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE541 21440 bytes
SHA-256: 2d846365c6165e10b34d99e4ddc7019871ec584f7b5b3dde740101e2f29a1281
font_01_sfnt_off00011ccf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CCF 10404 bytes
SHA-256: 23edab0ce563032c2db6d1058a2dc569b4e9c8e78632d12154f1d94338065393
font_02_sfnt_off00013476.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13476 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1