PDF malware analysis — malicious · 8ce269e3b4fdc5e2

MALICIOUS

PDF

83.2 KB Created: 2021-07-25 15:52:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: e8a7c20e7366dbb49bd586050e9191ea SHA-1: ef9d3fa8b93735607720091631e59c9d97a2abd2 SHA-256: 8ce269e3b4fdc5e229fdcbe591b2b68b28f06ae8e91c26318433cc8969c37478

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier with high confidence. Heuristics indicate it functions as a link farm, with numerous URLs pointing to potentially compromised or disposable hosting. These links likely serve as lures for phishing attacks or to distribute further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9984

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://ekolojikweb.net/upld/userfiles/file/52238044076.pdf In PDF document text
- http://bellsazshihtzu.com/clients/878694/File/kokijokaridesonekaz.pdfIn PDF document text
- http://saludocupacionalpso.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/160c52ed7b87dc---90344063820.pdfIn PDF document text
- http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b69b2eeb836---kowizowibikeweditok.pdfIn PDF document text
- https://ankaratemizlikcim.com/depo/sayfaresim/file/xevejavatipininatitapok.pdfIn PDF document text
- http://bhk-aindling.com/userfiles/files/95960138881.pdfIn PDF document text
- http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/55118027525.pdfIn PDF document text
- http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a68b45361b3---puxupexesu.pdfIn PDF document text
- https://menu2uplus.com/images/file/68723510538.pdfIn PDF document text
- http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160796ed5e9698---pidomijazasawijavisarowow.pdfIn PDF document text
- http://stoewebdesign.no/userfiles/file/8970409727.pdfIn PDF document text
- https://sportuna.be/ckfinder/userfiles/files/25449108786.pdfIn PDF document text
- https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/450dcaff7c9e1422ada93070ceba5636/pinozuxitotenimor.pdfIn PDF document text
- http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f766c93d7f---31227976680.pdfIn PDF document text
- https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16085d656e1005---11647023449.pdfIn PDF document text
- https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/cc86aadbe9fc1416e25c4816f48a16f0/40977939614.pdfIn PDF document text
- http://rykatd.com/files/wefesit.pdfIn PDF document text
- https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/9f7d6181edc2aa1a980ea42cb6c38342/pitimizomubenosumek.pdfIn PDF document text
- https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/16072efa84ad69---49514116443.pdfIn PDF document text
- https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/4fb946bbec4bcf8a38d24f6c26d931c6/kixovefob.pdfIn PDF document text
- http://yaqeen-eg.com/userfiles/file/516937801.pdfIn PDF document text
- http://iproperty.ae/userfiles/file/jujupeg.pdfIn PDF document text
- http://galerie-louise.be/userfiles/files/gelugizegoti.pdfIn PDF document text
- http://candybeauty.vn/upload/files/kewesubuxatedajod.pdfIn PDF document text
- https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acaf300a637---saxonubipajogowepuku.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3vuEKuznOb8/uplcv?utm_term=return+man+unblocked+full+gamePDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c8dd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC8DD	17192 bytes
SHA-256: `d0c9db4029fe010311a820bda83e8fb529c3bf624a6b8b896b94a27f6a346b78`
`font_01_sfnt_off0000f4b0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4B0	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00010cc7.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CC7	10936 bytes
SHA-256: `0217323168badf38a97318962ceaf5299e4044bd0d9f3b9af3811ebdad37b08c`
`font_03_sfnt_off000125ec.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125EC	16380 bytes
SHA-256: `677e9695f62afeefa27de66f2ae2c7cbd721294f5310bfc85fc12255cd4c105a`

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