PDF malware analysis — malicious · 7bf0aea2e9d687e5

MALICIOUS

PDF

79.1 KB Created: 2021-07-19 03:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: c8d1f1693b29d04f9527fdd0ca2e88b8 SHA-1: 720aa2f9c16c43757713c95ef208f78b19ff3e4e SHA-256: 7bf0aea2e9d687e58fee8e76b99ea833a06b84a6ff0b3515c263bbd5cbb081cc

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to numerous other PDF files hosted on compromised websites, indicating a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded URLs and the nature of the heuristics indicate that this document is part of a larger infrastructure designed to lure users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9844

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://aawyx.com/sites/default/imageuser/file/41539786020.pdf In PDF document text
- http://zhengfutz.com/v15/Upload/file/20216221622328605.pdfIn PDF document text
- https://harkakotony.hu/UserFiles/file/nemijegisavoj.pdfIn PDF document text
- https://pinpointfeedtech.com/ckfinder/userfiles/files/90545224500.pdfIn PDF document text
- http://hotstamping.pl/files/file/88994437267.pdfIn PDF document text
- http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607b1f3d02432---nofisezanirunenosed.pdfIn PDF document text
- http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16091160a80cfa---41443600853.pdfIn PDF document text
- https://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16072cb420bff9---13882534232.pdfIn PDF document text
- http://royalwedding.jp/images/blog//file/16639995505.pdfIn PDF document text
- https://legacyltg.com/wp-content/plugins/super-forms/uploads/php/files/01a26faae0d1655a7e5e704041e38387/vopelineripafadijeg.pdfIn PDF document text
- http://johncarroll1967.com/clients/1/18/1896e795ecc2602204d707ec4e69586f/File/lawusinukupadawopo.pdfIn PDF document text
- http://brenna-ski.pl/userfiles/file/17535261234.pdfIn PDF document text
- http://effektfilm.de/files/file/wagavezusegopewi.pdfIn PDF document text
- http://phannhan.vn/files/usersfiles/files/werelogojubazibo.pdfIn PDF document text
- http://www.climatisur.com/ckfinder/userfiles/files/desonenapo.pdfIn PDF document text
- https://yidinfo.net/wp-content/plugins/super-forms/uploads/php/files/shk908nrr1sma369v83alqciou/paberumasorepageguvukor.pdfIn PDF document text
- http://www.almansori-ye.com/almansorifiles/files/28304319484.pdfIn PDF document text
- https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b404c87800e---pofutigunafasuremaratek.pdfIn PDF document text
- https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/88beba580564315983394b705db86623/74253121892.pdfIn PDF document text
- https://tucsonhomewindowtint.com/wp-content/plugins/super-forms/uploads/php/files/10476eed93645d4b0a09f1f2d812afa7/97056607262.pdfIn PDF document text
- http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16082f22400067---jobedokamimuget.pdfIn PDF document text
- https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/391c5951982e020bd30ccda348571f12/90981531113.pdfIn PDF document text
- https://paeonia.ch/userfiles/files/87484153948.pdfIn PDF document text
- http://www.agrosystem.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609eec0fd4f56---xibolikonadasogaj.pdfIn PDF document text
- https://earplighting.com/wp-content/plugins/super-forms/uploads/php/files/216882f50b1e522df1a26390a3b02fa9/96423591964.pdfIn PDF document text
- https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/7ec89ee4778229aeb9a3cccc5bb806a7/74382694644.pdfIn PDF document text
- https://sambelteri.com/contents//files/kanopod.pdfIn PDF document text
- https://bawaniint.com/ckfinder/userfiles/files/kofibanob.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=meaning+of+altricialPDF 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_off0000cffb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCFFB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000e812.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE812	10336 bytes
SHA-256: `39dfdcf3ac4907340b6ebac332083d27211df5e8191d84ff086f5c99d865e240`
`font_02_sfnt_off0000ff82.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF82	18048 bytes
SHA-256: `822c3453ec30fc8d5bd6651f1d476adae93540a01f10a1b332c8c07051ae0292`

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