PDF malware analysis — malicious · 8a1bee8f19fe3597

MALICIOUS

PDF

78.6 KB Created: 2021-09-16 13:52:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: ea1de57414c751856f511071aa3d556b SHA-1: 942d04a7800004542272d40fa25c29f76db8ecf9 SHA-256: 8a1bee8f19fe3597ff48720b05d546009d48ed6f27cfeba0355e4df62ccd73bd

196 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is a PDF containing numerous external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to lure victims. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery. No scripts were extracted, but the structure and URL patterns are consistent with a malicious PDF dropper.

Machine Learning

Nyx PDF Classifier malicious score 0.9978

Heuristics 7

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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK

PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
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://wastran.ru/uplcv?utm_term=view+hd+instagram+profile+picture PDF link annotation
- http://ambulatorioveterinarioilghirlandaio.it/userfiles/files/93342812089.pdfIn PDF document text
- http://kubkao-kubpla.com/userfiles/files/fozenilapaza.pdfIn PDF document text
- https://vernadoc.com/wp-content/plugins/super-forms/uploads/php/files/be96492d7b3e39d3bcdc2aff5d5830ba/95239325677.pdfIn PDF document text
- https://vicareyou.com/userfiles/file/23103509877.pdfIn PDF document text
- http://ueros.fr/admin/ckfinder/userfiles/files/xorawarulixosul.pdfIn PDF document text
- http://vekosgroup.ru/userfiles/file/24406863256.pdfIn PDF document text
- http://npi-management.org/ressource/site-image/files/duwilexawajomo.pdfIn PDF document text
- https://letajicikoberce.cz/userfiles/file/darafogokegame.pdfIn PDF document text
- http://kwik-it.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613745fe707dd---95599148306.pdfIn PDF document text
- https://tatsolarlight.com/uploads/files/fajiribagitusaje.pdfIn PDF document text
- http://yuhenganquan.com/userfiles/file/20210902092016_1204764231.pdfIn PDF document text
- http://gongin.humenia.com/upload/userfiles/2021/09/files/210916102145.pdfIn PDF document text
- https://anfauglir.com/images/file/fepebekexurezowexidaros.pdfIn PDF document text
- http://www.startservis.sk/novy/ckfinder/userfiles/files/zigijur.pdfIn PDF document text
- http://ohmytour.kr/FileData/ckfinder/files/20210907_378B542C3D0DC630.pdfIn PDF document text
- http://appartenvue.net/appart/upload/images/sitawosaza.pdfIn PDF document text
- https://khambenhxahoi115.com/images/files/lodavikikewojinifozij.pdfIn PDF document text
- https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130f5ff7d20a---41360432192.pdfIn PDF document text
- http://giayviettri.com/img-ftec/files/xujerelelejazopejarelod.pdfIn PDF document text
- http://turinhotelcompany.com/userfiles/files/gugagaluporivu.pdfIn PDF document text
- https://kingwaterpure.com/ckfinder/userfiles/files/tadilonukavipapasibopibu.pdfIn PDF document text
- http://oaklandscreche.ie/userfiles/files/fugin.pdfIn PDF document text
- https://aarushimukhwas.idealviews.com/userfiles/files/wojiwusobipakofegefemadap.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_off0000cc9d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCC9D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e4b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE4B4	11220 bytes
SHA-256: `a7bc40bbfc4a7f2ff3c6e208840602ca2de47b0f8efebfe1a6d5d8c631a86168`
`font_02_sfnt_off0000feb2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEB2	17600 bytes
SHA-256: `178127319ef8c3cfaa20cf5de30809ef683d1ba279d065f5233d6ffc4a8a9444`

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