PDF malware analysis — malicious · 33b18b34cfa65fc8

MALICIOUS

PDF

88.3 KB Created: 2021-06-28 04:11:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25

MD5: 089bef4691666a4758f93af5d1968886 SHA-1: fb3501acfba0e91b4e8d894e1785b3ea50047a12 SHA-256: 33b18b34cfa65fc8d5f8c0423323d3da9515227d0094565afcbf3e2c0425c9a8

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model with high confidence. It contains numerous links to compromised WordPress upload directories, suggesting it's part of a link farm designed to redirect users to malicious content. The presence of these links and the overall detection indicate a phishing or exploitation attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9835

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://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ceecdd4f93---49724953245.pdf In PDF document text
- https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/69e95b787d7001faeb76591e3d7d8ad3/66506946257.pdfIn PDF document text
- https://rpdev.org/ckfinder/userfiles/files/83269015754.pdfIn PDF document text
- http://monkey-do.net/userfiles/file/12688306617.pdfIn PDF document text
- https://betenrealestate.com/sites/default/files/file/diwat.pdfIn PDF document text
- https://drsaman.com/files/62267813391.pdfIn PDF document text
- https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/11c1531e23f7c5b5c84a26ca88ba8a44/josenatujotujowudu.pdfIn PDF document text
- https://okazdedziecko.pl/_files/Media/file/7709264467.pdfIn PDF document text
- http://ackerviewguesthouse.com/userfiles/file/74584408493.pdfIn PDF document text
- https://www.sabiamente.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb6d4a20eb---kaxobajoxe.pdfIn PDF document text
- http://magyaringatlanadatbazis.hu/dev/_user/file/nokeniwirupeduroleneruxu.pdfIn PDF document text
- http://wksystems.net/HotelEstimator/userfiles/file/69410413354.pdfIn PDF document text
- https://na-nule.ru/wp-content/plugins/super-forms/uploads/php/files/t8lmp2ohcrudn0pu4h4923foo0/77975765870.pdfIn PDF document text
- https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/561ae77297fc153225c9f844d19f83ec/femisabutexomutor.pdfIn PDF document text
- https://technok.cz/wp-content/plugins/super-forms/uploads/php/files/14962d2a192e9f93c3f575b319420618/wonuwakoxitupaxuno.pdfIn PDF document text
- https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/eeajr61mlae1pka4t9dnh85827/fuwawim.pdfIn PDF document text
- http://suarezbeltran.com/aym_images/files/51023330731.pdfIn PDF document text
- http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3d9504ed6---jizuzox.pdfIn PDF document text
- http://brothersaluminium.com.np/wp-content/plugins/formcraft/file-upload/server/content/files/1608e6d025d1d2---25301914453.pdfIn PDF document text
- https://member-amz-seller-system.de/wp-content/plugins/super-forms/uploads/php/files/2d549e6a9a74205a8f4d4e7dd7c42f20/kokenorokomoweb.pdfIn PDF document text
- https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/7f5ab6fd5ae71db97fca0536a5d65bbe/83536651418.pdfIn PDF document text
- http://domholidays.com/userfiles/file/narezuxutexeboz.pdfIn PDF document text
- https://www.movingwithmagna.com/wp-content/plugins/super-forms/uploads/php/files/d6caf43a0c5313e074177cfdb1f8f109/wufapifasutisiwineliruzuj.pdfIn PDF document text
- http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c48c9cb582c---50367792819.pdfIn PDF document text
- https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/s015440o8rviqf2hismgms2hi1/lenoguxakikiriwudo.pdfIn PDF document text
- http://biomassasia.net/data_ed/userfiles/file/razezaxilamolemuzogovak.pdfIn PDF document text
- http://rld-carbon.ru/file/95969523488.pdfIn PDF document text
- https://lerong.vn/wp-content/plugins/super-forms/uploads/php/files/6d98e36e016185e0c8d1e2498c71bbc7/15148242465.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=golden+retriever+x+puppies+for+salePDF link annotation
- 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_off0000f45e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF45E	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off00010c70.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10C70	17556 bytes
SHA-256: `0d10d0e9889c5a57e8df3ae780d2cf0cdafa973cc1f4163d02e33d61a2066394`
`font_02_sfnt_off00013a45.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13A45	10800 bytes
SHA-256: `0d61f28fd05f28327dcc9558e7a88a564826e1c16bde80dde7513aac217c7abb`

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