PDF malware analysis — malicious · 4f1250ee01782162

MALICIOUS

PDF

81.9 KB Created: 2021-07-28 06:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: 68824fd1f09e0361bdae9eb6d7b7b808 SHA-1: 837c4de5e48d5ff3135d1b09434a1200cc03114f SHA-256: 4f1250ee01782162eda0b9fe70db1d5bf1aec97d9e1f5a2132fbf9624e642ac5

164 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and ML classifiers. It contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the document's primary purpose is to act as a link farm, likely to redirect users to malicious sites for phishing or malware delivery. The embedded JavaScript suggests an attempt to exploit PDF vulnerabilities or further facilitate malicious actions.

Machine Learning

Nyx PDF Classifier malicious score 0.9917

Heuristics 7

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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 http://w3-japan.com/js/upload/files/segukalig.pdf In PDF document text
- http://aliguoriarchitetto.eu/userfiles/files/8226976541.pdfIn PDF document text
- http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbcd193e68---zopovuzevakumumez.pdfIn PDF document text
- http://nokianhakkablue.ru/ckfinder/userfiles/files/66941009544.pdfIn PDF document text
- https://adasms.fr/userfiles/file/dajuwisosavulepijapigu.pdfIn PDF document text
- http://lukoilmarine.com/ckfinder/userfiles/files/sixalujijoti.pdfIn PDF document text
- https://przyklejki.pl/userfiles/difikuvoxibozid.pdfIn PDF document text
- https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/2b5b12b36a50ff8027a09e5480207729/roketotutogodijimexatite.pdfIn PDF document text
- http://usaoxin.com/userfiles/2021-6/file/79052965645.pdfIn PDF document text
- http://sostrevalli.it/userfiles/files/3543274472.pdfIn PDF document text
- https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/471d0887d15a296e57c8675f8303c628/63534649027.pdfIn PDF document text
- http://luckyassessoria.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16099aa329d6e0---30786763094.pdfIn PDF document text
- http://biomehl.com/images/content/files/tesisik.pdfIn PDF document text
- https://mt-creativestudio.com/ckfinder/userfiles/files/mafijibuminarerejiled.pdfIn PDF document text
- https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160dbd6a53b350---wakumuduwu.pdfIn PDF document text
- https://ludifrance.fr/userfiles/file/16544176034.pdfIn PDF document text
- http://www.ncstarim.com.tr/wp-content/plugins/super-forms/uploads/php/files/5nsv0jad5mi6q67sns7ahv1rt5/dumerajubululudokugegebir.pdfIn PDF document text
- http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf66917c234---kenibid.pdfIn PDF document text
- http://www.brickchamber.com/ckfinder/userfiles/files/jofojid.pdfIn PDF document text
- https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/c40f60204c20fc42dc8e97ca97c77343/romokefajedakesara.pdfIn PDF document text
- http://foxadv.net/file/34316259948.pdfIn PDF document text
- http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/3f8da4dc9b3d6e2528da8a9a23a4b6ed/34776792475.pdfIn PDF document text
- http://vietkinggroup.com/uploads/userfiles/file/vaduzivuf.pdfIn PDF document text
- https://silga.ca/userfiles/file/91339636428.pdfIn PDF document text
- https://hzautomatisering.nl/userfiles/file/5475303759.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=tamil+baby+thalattu+video+songs+free+downloadPDF link annotation
- http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/17afcfc8e8ae494a7f634c7371e79e9b/4596893819.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_off0000dbbb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDBBB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f3d2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF3D2	11272 bytes
SHA-256: `3297d33d358e96f476e4cdec1137f6f24d7f76923c1a1590880a9d8e4892e06e`
`font_02_sfnt_off00010df0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10DF0	16760 bytes
SHA-256: `17073323a6fa3fb67fc36f9f4e8c77621e82c371af513772261e24c7b47eacdd`

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