PDF malware analysis — malicious · 81adeac5da8fde9b

MALICIOUS

PDF

80.4 KB Created: 2021-09-18 11:56:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 0f662aa7c3a019629f1da38b3888c11f SHA-1: 85df0f88075ea02047bb2bf7ab048a69f48fe890 SHA-256: 81adeac5da8fde9bfdebbcbfb83c08e8c7a0ff45e2c1a756b28fdbf560d4ab40

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document was flagged by ClamAV as a phishing trojan and ML classifiers indicated a high probability of maliciousness. Heuristics identified it as a link farm hosted on compromised CMS uploads and disposable domains, with numerous embedded URLs pointing to PDF files. The document body is heavily obfuscated and unreadable, suggesting it is designed to evade static analysis and deliver malicious content via the listed URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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://archism.ru/uplcv?utm_term=keep+talking+and+nobody+explodes+centurion+manual PDF link annotation
- http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1614345d408d14---viwulivipananipunozazu.pdfIn PDF document text
- https://lecachet.fr/docs/files/vigawakoforefutini.pdfIn PDF document text
- http://sweatrinserepeat.com/ckfinder/userfiles/files/7463130630.pdfIn PDF document text
- http://ambulatorioveterinariomariani.it/userfiles/files/7450563331.pdfIn PDF document text
- http://www.hgekc.com/media/userfiles/file/bosogoniv.pdfIn PDF document text
- https://www.leasing.net.in/ckfinder/userfiles/files/66116776568.pdfIn PDF document text
- https://xn--q3cceuw0c6ab0d2ii.com/upload_file/files/83614965932.pdfIn PDF document text
- https://pelicanfinancialnetwork.net/ckfinder/userfiles/files/mevedutazikegepi.pdfIn PDF document text
- http://fcvperu.org/data/fcvperu/userfiles/file/30234952719.pdfIn PDF document text
- http://pattarasawat.com/ckfinder/userfiles/files/semesofarelanovilop.pdfIn PDF document text
- https://linkevicius.com/upload/galery/file/xedebirugupixu.pdfIn PDF document text
- https://speculatio.in/userfiles/file/rusonudev.pdfIn PDF document text
- http://globalroomplus.com/bot/ckfinder/uf/files/88317195940.pdfIn PDF document text
- http://theheavent.com/userfiles/files/fifolexefamiladawadiki.pdfIn PDF document text
- https://raselapp.com/userfiles/file/64250925131.pdfIn PDF document text
- http://siciny.eu/userfiles/file/30802710360.pdfIn PDF document text
- https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aadc3d3abf---dagirujaberuxineren.pdfIn PDF document text
- http://pattarasawat.com/ckfinder/userfiles/files/18989722672.pdfIn PDF document text
- http://meijialx.com/ckfinder/userfiles/files/zemikuzevulurapabut.pdfIn PDF document text
- http://sarkar.ie/userfiles/file/devesuwozudelobib.pdfIn PDF document text
- https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614176e23fa61---moralujobexukogevupokezes.pdfIn PDF document text
- https://martabaktelor.com/contents/files/nirozoselariwugemo.pdfIn PDF document text
- http://thewesternmist.com/userfiles/file/10756583516.pdfIn PDF document text
- https://12waktu.com/contents/files/46941801751.pdfIn PDF document text
- http://hairtransplantmangalore.com/uploaded_files/userfiles/files/tipifugazisiwudunajodasif.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_off0000ce80.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE80	11396 bytes
SHA-256: `81cf713238084c96aa59ad9f6b172b09fd59b9b77ba65102160685a29e42d9dd`
`font_01_sfnt_off0000e8f6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE8F6	19316 bytes
SHA-256: `b079512a5d17514749cd8eefb75d488eb000220b6a273b70abbc1ffb37fe1c88`
`font_02_sfnt_off00011b63.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B63	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

Open this report in the interactive analyzer, or submit your own file for analysis.