PDF malware analysis — malicious · e5ac9fb91b658428

MALICIOUS

PDF

86.6 KB Created: 2021-07-22 19:23:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: c51241e7bb982ea12b69cc1a4292c1f7 SHA-1: 2f365a95b3a19a0cdfb3a54342f2a1029db40ec5 SHA-256: e5ac9fb91b6584283f3448fb9bbb441f827bd84beeffca1610b7c25e26d45600

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm that directs users to various URLs, some hosted on compromised CMS uploads and others on disposable domains, suggesting an attempt to lure users to malicious content. No scripts were extracted, but the presence of numerous external links indicates a phishing or redirection attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9904

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://apexibd.com/uploads/fck_uploads/file/28974995781.pdf In PDF document text
- https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/1919d755f4153ac1ee9371e684ad6cc4/depikosak.pdfIn PDF document text
- https://egokituz.eus/files/galeria/files/kitufapibakirinosemuseg.pdfIn PDF document text
- https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609dfae5e79b9---1044707381.pdfIn PDF document text
- http://orbitsecurity.qa/pro_mvp_tech/uploads/file/zedefeme.pdfIn PDF document text
- http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/50961cb29bede390a146813cd82ccd2d/gaxinuwusotutadogum.pdfIn PDF document text
- https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/6daee5f16f641f7c21b1aa878a2c17eb/xusurolakiboweruwe.pdfIn PDF document text
- http://takeacode.net/user/d41d8cd98f00b204e9800998ecf8427e/file/setaduvupifazifevuxagufa.pdfIn PDF document text
- https://coloreverything.love/wp-content/plugins/super-forms/uploads/php/files/2d17cf803b9720be1adf983f8a2685fd/45291871559.pdfIn PDF document text
- http://aberdeeneyes.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607d47326e086---60529302743.pdfIn PDF document text
- http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ad309ca401a---45912652849.pdfIn PDF document text
- https://ahha.az/userfiles/file/ripoma.pdfIn PDF document text
- https://thinkglobalcompliance.com/ckfinder/userfiles/files/73032370095.pdfIn PDF document text
- http://themultifold.com/wp-content/plugins/super-forms/uploads/php/files/ejgfonmb9g5kqebgd3uunhf7i7/kojofaposuwalixosujemujav.pdfIn PDF document text
- http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160773e0b96b32---63471638486.pdfIn PDF document text
- http://ligneus.hu/upload/file/defufukijumoxegibarevo.pdfIn PDF document text
- http://maytinhtuyenquang.com/home/maytinhtuy/domains/maytinhtuyenquang.com/public_html/images/file/medijirenimifaname.pdfIn PDF document text
- https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/j15p50f4vvhhnuecccl72fohl7/xibupirifukotovirawuzo.pdfIn PDF document text
- http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160981ca505ef6---35688289512.pdfIn PDF document text
- https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/51bed32b7d1306dbf1f457313df41f5f/5679636197.pdfIn PDF document text
- http://kpotplace.com/uploads/files/fozudevokelegamube.pdfIn PDF document text
- http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f89daa32da4---3996144418.pdfIn PDF document text
- https://www.dartmusicfestival.co.uk/wp-content/plugins/super-forms/uploads/php/files/b70dd4f8c1566789572738ca7b677791/vizuwoxuvesu.pdfIn PDF document text
- http://aeskulap24h.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa80773e5c2---sivijimubajilonij.pdfIn PDF document text
- http://www.davidwoodpersonnel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db9bcff2135---61222737842.pdfIn PDF document text
- https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b742ef85f90---mibelelime.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=export+tables+from+pdfPDF 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.

Filename	Kind	Source	Size
`font_00_sfnt_off0000edc0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEDC0	10688 bytes
SHA-256: `e5989ecacfcecb341776a78d8c6696edc9b77d38572435fb51f32665cc6c4dfd`
`font_01_sfnt_off00010619.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10619	17200 bytes
SHA-256: `42c559e5a29707f3cd9416bcdc2c4a555b67905463b125bf278a39a05217deec`
`font_02_sfnt_off0001333e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1333E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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