PDF malware analysis — malicious · 9bb7afb6d92088fe

MALICIOUS

PDF

81.3 KB Created: 2021-08-29 02:58:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: aab19c289bfc7214f98c91b9eaaab11f SHA-1: 9c86c6baa6edf29015588584949ab089c5bf4621 SHA-256: 9bb7afb6d92088fe5dffdd1bb6ffd2f147aee04d72fff0866e1e4cbcb49fe650

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous external URIs and links to compromised CMS uploads, suggesting it functions as a link farm or phishing lure. The PDF structure and embedded links point towards an attempt to redirect users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9978

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 https://pixomot.ru/uplcv?utm_term=jesus+christ+descended+into+hell PDF link annotation
- http://medicapoland.pl/uploaded/file/xazafaze.pdfIn PDF document text
- https://bachson.net/upload/file/54702608968.pdfIn PDF document text
- https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/dghu31i46eta155lra2a37m05m/3744187663.pdfIn PDF document text
- https://taybaite.com/userfiles/file/vebarovadekasimebagotegos.pdfIn PDF document text
- http://bahtiyardishekimi.com/fckfiles/file/18347945952.pdfIn PDF document text
- https://llibreriaha.com/img/events/file/lamopapupisusaxe.pdfIn PDF document text
- https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/009cf50b43069cc4f12a4765fccbc549/17742916317.pdfIn PDF document text
- https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/tfout6lcb6fobhkedobju63se3/25856406077.pdfIn PDF document text
- http://xprchemical.com/upload/files/30255893610.pdfIn PDF document text
- https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608af9a2e3fec---nofovufaxi.pdfIn PDF document text
- http://dyneco.kr/userData/board/file/mewewerudawi.pdfIn PDF document text
- https://medok18.ru/wp-content/plugins/super-forms/uploads/php/files/dc0c6b440649b799b3df511ce519860f/79137747095.pdfIn PDF document text
- https://charterfori.ir/basefile/charterforiir/files/supeguvam.pdfIn PDF document text
- http://theclubburger.com/uploads/files/vabiragapavogalepavujoja.pdfIn PDF document text
- http://el-system.jp/uploads/2012/files/bojes.pdfIn PDF document text
- https://terracell.info/images/file/jujadixegegenenategisaso.pdfIn PDF document text
- http://libertyquad72.fr/userfiles/file/xolatozakezu.pdfIn PDF document text
- https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080258ec2c48---64551587915.pdfIn PDF document text
- http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083e68eb8e7b---dawatokujaxogitade.pdfIn PDF document text
- https://tocgia247.com/wp-content/plugins/super-forms/uploads/php/files/icnp319i5vtfo8fkpjkura1q4c/64469689947.pdfIn PDF document text
- http://offerseir.com/basefile/offerseircom/files/2895254484.pdfIn PDF document text
- https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/c3cd77edb1b75d4c7ffdb6cfa833ebfd/6172896020.pdfIn PDF document text
- http://teamtrinity.net/trinitya/file/sofebubavimowonu.pdfIn PDF document text
- https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16088a9976365f---buxotipuwitage.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_off0000d766.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD766	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ef7d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF7D	10396 bytes
SHA-256: `965796817c2857f927a50f15fbd5e098dcb772c372406118b6bcb278d8779138`
`font_02_sfnt_off000106f0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x106F0	18604 bytes
SHA-256: `c0544f733fccbd9d5bb9eb899251c5423aeae4d2273db631169e1db3903e03fc`

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