PDF malware analysis — malicious · bad6d2aef9acc696

MALICIOUS

PDF

72.5 KB Created: 2021-09-16 22:20:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 1381bdadb7660ac4d81352de21216aa4 SHA-1: 2499292f9f72d61657dd39bb9cce00b945775edd SHA-256: bad6d2aef9acc696d233218a2b5cb5687458941f2ee8a0b7ec58a1648a9dbc56

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are structured as link farms, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites, potentially for further exploitation.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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
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.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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://chcial.ru/uplcv?utm_term=the+rookie+season+1+putlocker PDF link annotation
- https://bywuf.org/upload/editor/files/13345998604.pdfIn PDF document text
- http://creaorganization.com/depo/sayfaresim/file/sikajinuxukoz.pdfIn PDF document text
- http://bestpokeya.com/uploads/files/72692879490.pdfIn PDF document text
- https://eownauto.com/uploadpic/files/werukudakat.pdfIn PDF document text
- http://airelimpio.mx/img/editor/file/galamekuvi.pdfIn PDF document text
- http://uniondrygoods.com/fckeditor/userfiles/file/kumudulapazijuxi.pdfIn PDF document text
- http://mastervin.ru/files/file/dojusuratewiwabis.pdfIn PDF document text
- https://www.delaneyllc.com/ckfinder/userfiles/files/pixekutasaxofeg.pdfIn PDF document text
- https://www.tristar-technology.com/ckfinder/userfiles/files/78933616919.pdfIn PDF document text
- https://milsagliksen.org/upload/ckfinder/files/48112164696.pdfIn PDF document text
- http://sonsuadogo.org/Images_upload/files/kutoxufopamozid.pdfIn PDF document text
- http://eunlocker.com/Images/Editor/file/bogivomakugoxezab.pdfIn PDF document text
- https://filetorme.com/upload/files/vuwenafo.pdfIn PDF document text
- http://www.yevres.fr/ckfinder/userfiles/files/4245659568.pdfIn PDF document text
- http://nigerseedindia.com/uploads/11355782754.pdfIn PDF document text
- https://nocnepal.org.np/ckfinder/userfiles/files/dalagotunedokej.pdfIn PDF document text
- https://ladachess.ru/userfiles/file/29201127286.pdfIn PDF document text
- http://sinorarechem.com/upload/files/ponomokivufazog.pdfIn PDF document text
- http://alacarte-grafik.de/userfiles/file/sisilezuvonugogudufagasow.pdfIn PDF document text
- http://w-f-l.de/user_img/file/nujepodijilasifegut.pdfIn PDF document text
- http://quickfix-poland.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b53a639990---sopemugarunezomorilito.pdfIn PDF document text
- https://mk-sito.it/uploads/file/tawab.pdfIn PDF document text
- https://ecowaytechnologies.com/ckfinder/userfiles/files/25541062737.pdfIn PDF document text
- https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/9ad6ccf3eb54d2d9b23618a3fece707a/52629474457.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_off0000b7aa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB7AA	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000cfc1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCFC1	10680 bytes
SHA-256: `7fcea542e51bfb1ee76f709bb124ae4beaa0a2cd0654fd5149d96b91bf0abf0b`
`font_02_sfnt_off0000e847.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE847	16512 bytes
SHA-256: `e02b07988d04d83a43e2b27a1ec72f7fe921017706ef4d824b6aa7966d0948d9`

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