PDF malware analysis — malicious · 8be7b30ee90179bd

MALICIOUS

PDF

80.9 KB Created: 2021-08-06 12:16:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 17f520830b4801a78263a89ac3dc9689 SHA-1: 76c0afbe2ce47cd9d772fa6ab32c7436739e4a77 SHA-256: 8be7b30ee90179bdd7aa30b197535539491c0cbd80a3fabe113591164394368e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous links to compromised CMS uploads and disposable hosting, suggesting it's designed to redirect users to phishing sites or malware. The embedded URLs, such as http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bbfe0222580---1366707825.pdf, are key indicators of this malicious redirection behavior.

Machine Learning

Nyx PDF Classifier malicious score 0.9942

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://arerp.kr/data/file///6429018069.pdf In PDF document text
- https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/8610dc09c57bf141a81f75aee450b40f/xotobegibeboranigojapi.pdfIn PDF document text
- http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/80b660a8d9bdd9dca1b6732e57c3491a/tipadeduperabamo.pdfIn PDF document text
- http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/160875610dcc34---xesegugebeluvobenibog.pdfIn PDF document text
- http://vanphongphamhienluong.com/upload/files/wojajisimujolibud.pdfIn PDF document text
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160be8e48354e7---21707494139.pdfIn PDF document text
- https://bestmiamiturf.com/wp-content/plugins/super-forms/uploads/php/files/35521e78f5675bd7feb02b6c9b4c1346/41226856577.pdfIn PDF document text
- http://gramercygrand.ru/files/file/16241652104.pdfIn PDF document text
- https://mygamedaysports.com/wp-content/plugins/super-forms/uploads/php/files/cb482c2bce38f66f27180b980b5c600c/kofomipovuxevomari.pdfIn PDF document text
- https://bonpetsupply.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079d3fa212d2---bubokenojivupakid.pdfIn PDF document text
- http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160bbfe0222580---1366707825.pdfIn PDF document text
- http://usmleworkout.com/files/file/76679725028.pdfIn PDF document text
- http://neuragen.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ce118821e55---rulajozosikupanufumekusig.pdfIn PDF document text
- https://ehblending.com/wp-content/plugins/super-forms/uploads/php/files/73477f62fbc4a7699790a3455e2881a2/39917674408.pdfIn PDF document text
- http://gistys.com/userfiles/file/80288923795.pdfIn PDF document text
- https://hoakhanh.vn/uploads/image/files/dedozizulaguxi.pdfIn PDF document text
- https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/7657cc342170570ab3e9f91b5b5b42cb/11111130159.pdfIn PDF document text
- http://greece-ex.com/images/blog//file/51705204138.pdfIn PDF document text
- https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16075b3674eb1d---genibuvijasejalofofofuk.pdfIn PDF document text
- http://markasib.ru/ckfinder/userfiles/files/dagexirebosokedulazaw.pdfIn PDF document text
- https://cristalparkhotel.com/ckfinder/userfiles/files/fujewesuxapalafalitudek.pdfIn PDF document text
- https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d5c2ea8e237---lefugigofivisogawi.pdfIn PDF document text
- https://www.enviedecrire.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075496e52725---95410613828.pdfIn PDF document text
- http://libertyquad72.fr/userfiles/file/50852263766.pdfIn PDF document text
- https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071e37227db9---92578086934.pdfIn PDF document text
- https://flvirginia.com/wp-content/plugins/super-forms/uploads/php/files/19eb76d27f00683081a4d6b930e51a95/mowixezekat.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=linea+de+captura+para+pago+de+tenencia+del+estado+de+mexico+2020PDF 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_off0000d117.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD117	11256 bytes
SHA-256: `a29e4bd817fe3111c2b6b0a6370856a5f4a68a707e4469ff4edd21bdac7228e2`
`font_01_sfnt_off0000eb46.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB46	18204 bytes
SHA-256: `c3ba0adc6377f8521946673633a2d8ea0ad80524e116fd5dd0c131aba2ac9ab9`
`font_02_sfnt_off000119dd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x119DD	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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