Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae222bfc6102d905…

MALICIOUS

PDF

95.3 KB Created: 2021-06-28 06:05:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 54db7dd0a2b0d9b960e595f06104fadb SHA-1: 1f7bcd65724ff197ecea5dc7feaffa10183ce8ec SHA-256: ae222bfc6102d9053b6bc8022917ae6d7f852b282a7af62c11b0cdfa9d6e2017
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links to compromised websites, including WordPress upload directories, suggesting a phishing or malware distribution campaign. Although no scripts were explicitly extracted, the PDF structure and embedded links indicate it's designed to redirect users to malicious external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ketchas.ru/uplcv?utm_term=entropy+in+irreversible+process
    • http://fiumaradelsossio.it/userfiles/files/wezepikuvozevutusul.pdf
    • http://haciogullari.com/depo/sayfaresim/file/95622890579.pdf
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/cf31e6c313c8fe734fe26a4764c45b04/jobesegewevavezire.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/3167d319c9a0b6a97073f4d791d2189a/70909662928.pdf
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/c6da561d031bcb10c06ca14264679313/93594395757.pdf
    • http://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/mamegobig.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0bf895396---56080102642.pdf
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/16089322c8907f---japoxarulojapugufozavam.pdf
    • http://perchegouet.com/ckfinder/userfiles/files/difuwapukawemagib.pdf
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b86207022f0---sonobefojujuraboduk.pdf
    • https://mides.vn/images/ckeditor/files/14758789138.pdf
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/ae3262cb27f122a0eaf68ad54d3abbbe/xivedelosoxagabanonabaf.pdf
    • http://hilltop1976.com/clients/24685/File/75180789039.pdf
    • https://lightingsystemscol.com/wp-content/plugins/super-forms/uploads/php/files/73a362eff87262d8b834abfde10889c8/batukijewezibasol.pdf
    • http://jnnycc.org/userfiles/file/94230150298.pdf
    • http://100gastro.cz/soubory/files/7560794981.pdf
    • https://ludifrance.fr/userfiles/file/60821454140.pdf
    • http://woonhuislift.info/wp-content/plugins/formcraft/file-upload/server/content/files/160ac21c170531---nugomafejivez.pdf
    • http://bezagsecurity.cz/userfiles/bibigowa.pdf
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/fae921bb86f0953979a3b4146a821e77/wuzewogalopefexilivagebu.pdf
    • http://sam-global.info/files/file/81221468627.pdf
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1f3b928da---towumasutolob.pdf
    • http://www.predoisiasociatii.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160831d395710a---6252595990.pdf
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16082acad6a2ff---zafopox.pdf
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/160805674e4204---1714124189.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_off00010fb2.bin
3beedee51845e27af0fa189e277b523ad30692728bf56b38cc5e7ebf13bc9546
pdf-font-stream PDF embedded font (sfnt) at offset 0x10FB2 10508 bytes
font_01_sfnt_off0001278b.bin
a009e7e096321b0a0a1ffd8497b6150f9b6b703768b37a9a8faab63ffc9a9a1a
pdf-font-stream PDF embedded font (sfnt) at offset 0x1278B 18428 bytes
font_02_sfnt_off0001579b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1579B 16792 bytes