PDF malware analysis — malicious · ebbd7b29819fd765

MALICIOUS

PDF

83.5 KB Created: 2021-09-01 14:57:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 2532b32a70c89ffc730515822ecceb80 SHA-1: 005b19c08048400cada83fbeeacf4baf8d45117a SHA-256: ebbd7b29819fd7653cd499c9bbb439097bbc70fa525e81288567bf355c4e83e1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised CMS uploads and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs are likely used to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9978

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://inwebjor.ru/uplcv?utm_term=bruit+meaning+in+tamil PDF link annotation
- http://ippon.lv/uploads/File/sijupanese.pdfIn PDF document text
- http://bekescsaba.varosom.hu/userfiles/files/46063571357.pdfIn PDF document text
- https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/5c0b9d9b7399c2e7c453632ead892209/42064532645.pdfIn PDF document text
- http://bhk-aindling.de/userfiles/files/72559441301.pdfIn PDF document text
- https://accesoriosalmayor.com/images/userfiles/file/23294654373.pdfIn PDF document text
- https://kindeeyudee.com/ck_files/files/33061970811.pdfIn PDF document text
- http://theonejsc.com/userfiles/file/fowuveputofevonez.pdfIn PDF document text
- http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612949bf0fc73---64957117505.pdfIn PDF document text
- https://vocembalo.ch/userfiles/file/57783190504.pdfIn PDF document text
- http://evohome.pl/userfiles/file/zakepe.pdfIn PDF document text
- https://saatyapi.com/upload/ckfinder/files/narirezuwarinukoluzow.pdfIn PDF document text
- http://acmemask.com/upfiles/editor/files/21190025462.pdfIn PDF document text
- https://doellefjelde-mussemarked.dk/images/newsmail/file/61979130345.pdfIn PDF document text
- http://bienbao.net/uploads/files/60477392399.pdfIn PDF document text
- http://kondicionery-dolgoprudny.ru/upload_picture/file/82022437192.pdfIn PDF document text
- https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611a58f98fe0f---faradivu.pdfIn PDF document text
- http://cheapneasytrafficschool.com/CheapNEasyTrafficSchool/pa/trainstation/uploads/image/file/bovotolesuviradeda.pdfIn PDF document text
- http://influences-vegetales.eu/assets/Image//files/wudivetivevusogepexomexa.pdfIn PDF document text
- http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609c5a7edc0ec---rebaxifaja.pdfIn PDF document text
- http://ytovietnam.net/ckfinder/userfiles/files/62806738030.pdfIn PDF document text
- https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f4991db6d18---8672900014.pdfIn PDF document text
- http://statsale.com/data/upload/ck/files/69755955454.pdfIn PDF document text
- https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/30190681827.pdfIn PDF document text
- https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/b70fd99193e6b48f801992bae1900fdb/47427141563.pdfIn PDF document text
- http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e8cc66cbd---83320793298.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_off0000db8b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB8B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f3a2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3A2	10316 bytes
SHA-256: `2b4eb66149acebaeb4f4c80383a75348a899752faf833a1182b57c3a27e2c137`
`font_02_sfnt_off00010ad6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10AD6	19536 bytes
SHA-256: `a591e9187d00990f9ac228c32ff711ec697c1d071a842902e96f788e0e4b15fd`

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