Malicious PDF — malware analysis report

Static analysis result for SHA-256 126976ddbb190409…

MALICIOUS

PDF

83.7 KB Created: 2021-06-30 08:51:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 38c9f3e015613732f7bdc6e111777a81 SHA-1: 42c2c12d26a532a04422f4b9715d9b853ee6e6e4 SHA-256: 126976ddbb190409dc3f91bad7dd9ebaec07a2994af9312dd3dc07bbd1e34b59
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm hosted on multiple disposable domains, suggesting an attempt to distribute malicious content or phish users. The embedded URLs point to compromised CMS upload storage and other potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://cmtsport.com/pliki/69364256623.pdf
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608587b60f0f6---fopugasakiru.pdf
    • http://starlightcelebre.com/clients/4/43/43e9139217482d7666ce300faf566241/File/59321879321.pdf
    • http://penoplex24.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608683d01822f---9726362594.pdf
    • https://namdolove.com/FileData/ckfinder/files/20210531_0DBCD8359DAD9DF0.pdf
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160b8c667eae01---76556118256.pdf
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4229e7fa3---59823609989.pdf
    • https://avigailpekelman.com/sites/default/files/file/55975958191.pdf
    • https://daxitrip.com/basefile/daxitripcom/files/kisitolevurine.pdf
    • http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d8805d2c2---lugijodidanutojurad.pdf
    • https://daleplumbinginc.com/wp-content/plugins/super-forms/uploads/php/files/f66cf73d09682f8d7d1b03d05b65eae5/fupulitodotifuza.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/ad29351e8820733a0cc2b1d0de7b14ae/75571176138.pdf
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/c59f832073278241d302a1cbd1c36164/4690046978.pdf
    • http://curry-box-deluxe.de/userfiles/file/391553763.pdf
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/1b02a8d72fabd0aa24531a7c11051f52/pokagizerosediwotugu.pdf
    • https://fa-vietnam.com/webroot/img/files/75885092910.pdf
    • https://www.hintonassociates.com/wp-content/plugins/super-forms/uploads/php/files/eeba483473c7881dc4929043c9e02cd6/fenolawajijida.pdf
    • http://otoozevran.com/resimler/files/61519281731.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160d61cce2259b---wanilebakigedi.pdf
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/1bea6c00166055ead8cd21b2db7d431c/89933805505.pdf
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/da996e4medd4804jbgpu7gr506/pezikut.pdf
    • https://victorybear-info.com/userfiles/files/26099015471.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=cannot+verify+identity+iphone
    • 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_off0000e34d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xE34D 16792 bytes
font_01_sfnt_off0000fb64.bin
ea15b846ac99fda7f94234543da2512919bd0f39d2495a3a51dba25d059776c0
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB64 10592 bytes
font_02_sfnt_off0001138d.bin
e3f1e42d436502379e5f5c208d6d1c066c4c1dee0cdb18b09e3ad4c79a110504
pdf-font-stream PDF embedded font (sfnt) at offset 0x1138D 16928 bytes