PDF malware analysis — malicious · 95c26e69c1be5a7c

MALICIOUS

PDF

82.2 KB Created: 2021-06-27 22:21:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: e1432f678de007706b7796654778e805 SHA-1: dcec1dd33f95ed790ba717fe33d7675b6bcc36de SHA-256: 95c26e69c1be5a7cbb2e8c82e423809a31b01a11f521412ee5994e9212b8e6c6

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a high number of embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. No scripts were extracted, but the PDF structure itself is used to host and present these malicious links.

Machine Learning

Nyx PDF Classifier malicious score 0.9846

Heuristics 7

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK

PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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://smidgel.ru/uplcv?utm_term=life+changing+choices PDF link annotation
- https://apsco.ly/userfiles/files/velagemitokisitomuteg.pdfIn PDF document text
- http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/g32pfstlefudlvkq2dji81c6e7/12740972160.pdfIn PDF document text
- https://shared401k.com/wp-content/plugins/super-forms/uploads/php/files/4705af17b5934c5d3c244c137e4dbb60/3646309551.pdfIn PDF document text
- http://www.bufolari.com/public/immagini/file/worozulojelebosurewonikil.pdfIn PDF document text
- https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608223ae2131b---xibenaxinebofolixo.pdfIn PDF document text
- http://neilreardon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/78086699952.pdfIn PDF document text
- http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606da87f77de3---banigefamozatiresedemo.pdfIn PDF document text
- http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/6647a071c9cfd371d2e12359a3427544/parezikilegusobodig.pdfIn PDF document text
- http://doublehappyvstheinfinitesadness.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ce84b6be6c---51687679796.pdfIn PDF document text
- http://alphasigmaoverseas.com/userfiles/file/55662748602.pdfIn PDF document text
- https://ccveg.org/wp-content/plugins/super-forms/uploads/php/files/j8irqtfruejijas2p0tp1gpds5/84582762620.pdfIn PDF document text
- https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609eaaf4a55b2---51881840667.pdfIn PDF document text
- https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/30de9c3f88fddb5702fa52f334f9da13/nibunolinobagefalaw.pdfIn PDF document text
- https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/160750bced5f59---benuj.pdfIn PDF document text
- https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/3a299d4052c67aba39fac36edb9438a8/11569291728.pdfIn PDF document text
- https://www.eoluk.com/wp-content/plugins/super-forms/uploads/php/files/euqevt4g71hn382r182bpf2ga8/34003624271.pdfIn PDF document text
- https://ladychief.com/wp-content/plugins/super-forms/uploads/php/files/bac38c21364ffe686411b5fdba7f43ea/47114041012.pdfIn PDF document text
- http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9c8de7a27---97568357327.pdfIn PDF document text
- https://alamansyria.com/userfiles/file/13652729426.pdfIn PDF document text
- http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160895fe9eb575---kisolu.pdfIn PDF document text
- http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160791bd3dc45a---bunedo.pdfIn PDF document text
- https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096b232a7fdf---wabujenurivimubikadifut.pdfIn PDF document text
- http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/2a3486043ecc1ad50c10814e6051f12f/65565465854.pdfIn PDF document text
- https://arizonalightingsales.com/wp-content/plugins/super-forms/uploads/php/files/fa3fc4ac7b8c84ef85693a565d26a11b/giwulepapomajo.pdfIn PDF document text
- https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/ko3uta1gjj5m5ug6ejombbol1t/40832867317.pdfIn PDF document text
- http://schroniskoorzechowce.pl/ckfinder/userfiles/files/tepogab.pdfIn PDF document text
- 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_off0000df53.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDF53	10328 bytes
SHA-256: `2288cb3461c0720cf4b52d8fdaf654eea4d1a9d067abc072f6605a97988c895f`
`font_01_sfnt_off0000f689.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF689	17108 bytes
SHA-256: `4e25e1e4aa472039f13c91933b7103df1535a3f053089de295f61eb9e5d4c2af`
`font_02_sfnt_off00012364.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12364	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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