PDF malware analysis — malicious · 38f589678782b2aa

MALICIOUS

PDF

84.1 KB Created: 2021-07-06 14:51:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: e5ead6794cacc085060b2f6ff9b50250 SHA-1: 4618a50d8d32d292a3e47295e12596794abbb771 SHA-256: 38f589678782b2aaf6b79ec592d6c4c6fc505e68e31294b708278e4a452e6849

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF was flagged by ClamAV as a phishing trojan and ML classifier indicated high maliciousness. It contains numerous links, many hosted on compromised WordPress sites, suggesting a link farm designed to redirect users. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9833

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://cructi.ru/uplcv?utm_term=goat+head+drawing PDF link annotation
- http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc40bac7600---gejuzezukafepawal.pdfIn PDF document text
- http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607a951b8b65f---27203408091.pdfIn PDF document text
- http://moda-minulosti.cz/docs/momin/file/melipo.pdfIn PDF document text
- https://eobliecky.sk/userfiles/file/pirijutudeju.pdfIn PDF document text
- https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc9e2e5007---7152365146.pdfIn PDF document text
- http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/6d804aab6d2200301ac3f8493c775fe3/37111742565.pdfIn PDF document text
- http://stevis.cz/files/file/lagez.pdfIn PDF document text
- http://beiks.info/public/file/gegagamebexujave.pdfIn PDF document text
- http://kameleonhastanc.hu/files/file/mamibibafaxokuzupin.pdfIn PDF document text
- https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608979d0aadf8---fitunon.pdfIn PDF document text
- https://bokseinstituttet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16083e4b43f130---gudibobuxukerabizafixeruv.pdfIn PDF document text
- http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a79ccc0029b---52754189992.pdfIn PDF document text
- https://www.baptistenhardenberg.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160b77b58e5e13---83188212417.pdfIn PDF document text
- https://fultoys.com/userfiles/zogukofesixixunuzidama.pdfIn PDF document text
- https://www.ptlittleflower.org/wp-content/plugins/super-forms/uploads/php/files/9v8ll5b932h7i9duf1fmbakc5e/nodoxezegibofuzorako.pdfIn PDF document text
- http://tangiahoang.com/skinkorea/Images_upload/files/rufataxusimonoruvabumon.pdfIn PDF document text
- http://www.chinahkcarplate.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609fd4de8ecdd---fegeri.pdfIn PDF document text
- http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e3889a3d70---48406538928.pdfIn PDF document text
- http://chunmianxian.com/upfolder/e/files/20210626092510.pdfIn PDF document text
- https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/a26c9253425e2b206ea3d13ecd82131b/48923216347.pdfIn PDF document text
- https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/8e1a7332e8f68c9d56e2150159ebdf65/72027685628.pdfIn PDF document text
- https://nepalonetours.com/userfiles/files/jupukividujokod.pdfIn PDF document text
- http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/sitl0l0kv8htes14aenfkd51l7/nozivubemufuvasusima.pdfIn PDF document text
- https://www.ferienhof-schneider.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e8d51fe23---lobuzepepimos.pdfIn PDF document text
- https://catherinehourihan.art/wp-content/plugins/super-forms/uploads/php/files/9a9434bb12bdca9594d9bd22888c2c7a/97892714130.pdfIn PDF document text
- http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16074afa463613---96424540835.pdfIn PDF document text
- http://www.onegelha.com/wp-content/plugins/super-forms/uploads/php/files/52836d417a8e11c340494d7e62a5460b/rakamemefakusiduvasixub.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_off0000e408.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE408	10440 bytes
SHA-256: `ee9d773299e66cec5c2e176b6a96a95bad724260186588cb2f92dfbc93935aef`
`font_01_sfnt_off0000fb8b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFB8B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001139d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1139D	18104 bytes
SHA-256: `9300e58b7cd9115a5230a77131400c527f3edcae9a41529b2bd01ba1b1437f67`

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