PDF malware analysis — malicious · 57c18bc57357e0d2

MALICIOUS

PDF

95.6 KB Created: 2021-06-09 04:42:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26

MD5: 96bc22304a0cf71833861c37a8175a88 SHA-1: a864661f4c6c432a7565ee246f507bcf2e716598 SHA-256: 57c18bc57357e0d27122720427bdf87aeabcb4d2f615da203e96127908116e24

194 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file contains numerous embedded links, many of which point to compromised WordPress upload directories or disposable hosting, indicating a link farm designed to distribute malicious content or conduct phishing. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.8593

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 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
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=manohar+pandey+gk+book+pdf+in+english PDF link annotation
- https://bodegoncriollo.com/userfiles/file/posatorezuwemogojonixi.pdfIn PDF document text
- https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/0n6fh18qi82gp03jjl2k4tiv4o/10380078212.pdfIn PDF document text
- http://herodumpsterrental.com/wp-content/plugins/super-forms/uploads/php/files/889f96cebcd5456f96fa340b41083ad9/38130377766.pdfIn PDF document text
- http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/vepunol.pdfIn PDF document text
- https://atcotourismtravel.com/userfiles/file/voxebox.pdfIn PDF document text
- https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f180b8e06---69541699941.pdfIn PDF document text
- https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/nvk8t38vh1g59f6pr7ogop79s8/80430725712.pdfIn PDF document text
- https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/0bb2120fe3756355f2e63f223a795e7f/69031648165.pdfIn PDF document text
- http://niestachow.pl/data/aktualnosci_imgs/file/24275919185.pdfIn PDF document text
- https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089f02be9680---fininul.pdfIn PDF document text
- https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d9afae2c86---sizikugujuwago.pdfIn PDF document text
- https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/160746b5696842---62081623429.pdfIn PDF document text
- http://rolmech-strzelno.pl/Upload/file/62513983283.pdfIn PDF document text
- http://szkolka-wiercioch.pl/files/file/48344323805.pdfIn PDF document text
- http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a0088d30b15---bononajames.pdfIn PDF document text
- http://nickels.design/ckfinder/userfiles/files/dilarasideletodesepuf.pdfIn PDF document text
- http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/p9ovd4dfio9o4h4rglu4066at0/xituravaxupu.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://scripts.sil.org/OFLIn PDF document text
- http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
- http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0001393c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1393C	5616 bytes
SHA-256: `10599e6e0022476a8cb68a3a0cce418cffa13b4c73e2e7ca6f7e71b1fa3ea546`
`font_01_sfnt_off00014c5f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14C5F	3720 bytes
SHA-256: `d0c9e33916e9e64e42e31bcf0d345f6c2fcd41735b1a34df0119bd0eb1094281`
`font_02_sfnt_off000157c3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x157C3	10724 bytes
SHA-256: `2692103900acf4cde3e43b030de02d760b6829b4e76c6018b7f1d914a109bd7d`

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