PDF malware analysis — malicious · dbe68680970c852e

MALICIOUS

PDF

90.4 KB Created: 2021-08-24 17:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 6a6b5a129e807492b1c85209de53b374 SHA-1: b193e11f2272537b35fb8db7a9f078810d5d3f02 SHA-256: dbe68680970c852ecca42e512c9d440d2fcde0292c60031d0278b16733e549d5

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF was flagged by ML and ClamAV as malicious, indicating a phishing or trojan threat. It functions as a link farm, with numerous URLs pointing to compromised CMS uploads and disposable hosting, likely serving as a distribution point for further malicious content. The document body is unreadable, but the heuristic findings strongly suggest a malicious intent to redirect users to harmful sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9981

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://camphacement.vn/upload/files/wojonususoxijikaza.pdf In PDF document text
- https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af401a20d57---bujilejafenitiw.pdfIn PDF document text
- https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/587a197f5d8381367190a502c941928e/97809773947.pdfIn PDF document text
- https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/f5tfcatleeeo3bf4k55vgjdbrn/48221300415.pdfIn PDF document text
- https://alkalacarservice.com/public_html/userfiles/file/talozito.pdfIn PDF document text
- http://chiengthai.com/file_media/file_image/file/nolusogosemotopiv.pdfIn PDF document text
- http://metzpaintings.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608239a7ca1b0---lovusoper.pdfIn PDF document text
- https://dm288.rs/slicice/file/fudanupima.pdfIn PDF document text
- http://softwarefactory.nl/images/file/64691887069.pdfIn PDF document text
- http://alimentosldm.com/userfiles/file/kogedelarurad.pdfIn PDF document text
- http://neoneofitou.com/ckfinder/userfiles/files/pumusawiwavifemaxesujop.pdfIn PDF document text
- https://calendarsunrooms.com/userfiles/files/wuruzekidaxibe.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088e8341fee9---47290036447.pdfIn PDF document text
- http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ddf9fbed23---3300216083.pdfIn PDF document text
- http://ufnk.fr/app/webroot/files/file/98007252252.pdfIn PDF document text
- https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b0cbd950e94---6606750740.pdfIn PDF document text
- http://happy-travel089.com/CKEdit/upload/files/90467836257.pdfIn PDF document text
- https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/4de6rlf0ubm8n92csagta7q16f/dabixatodemuwa.pdfIn PDF document text
- https://vallejardin.com/wp-content/plugins/super-forms/uploads/php/files/6eeb77e73a919a01ef8526f501e8bc3b/lumovenigadetarelitabe.pdfIn PDF document text
- http://lotuscourtpune.com/wp-content/plugins/super-forms/uploads/php/files/shcjr8hijaboil62spccie20t3/marodirepapejavuxif.pdfIn PDF document text
- https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/8d90d76db43daa6e15570e0ddfb87958/77163857495.pdfIn PDF document text
- http://heryeryesil.com/resimlerfiles/pixikurasimi.pdfIn PDF document text
- http://abpaluso.com/upload/file/8352678905.pdfIn PDF document text
- http://evopizza.lt/ckfinder/userfiles/files/36971584820.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=what+is+additive+inverse+of+rational+numberPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e789.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE789	17424 bytes
SHA-256: `5d1fd21302a6d37742216e21bd4d81dd03e3f59db96d92e65c357b7a912f4422`
`font_01_sfnt_off00011472.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11472	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012c89.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C89	10916 bytes
SHA-256: `589e4868d549485a44c691d2e89db561c18c845096a6ea0940d5eabbfba9f279`
`font_03_sfnt_off000145a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x145A3	16088 bytes
SHA-256: `450eea5fc67953cc3bdc764260aa6f1739571c17331c9588074966c3dbef4c6c`

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