PDF malware analysis — malicious · 7338e4249d443b78

MALICIOUS

PDF

80.7 KB Created: 2021-10-06 23:31:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: 43c47f1abb85fab01a73d2f6acf86b47 SHA-1: db133ea586144e9c30ff004422b2e20d327d3f9f SHA-256: 7338e4249d443b78bbee8ee1e4a560c35c321f4bacb2ca0ad30c68ec0e9d3323

146 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as 'Pdf.Phishing.Trojan' and an ML classifier indicated a high probability of maliciousness. Numerous embedded URLs and a link farm heuristic suggest the primary goal is to redirect users to potentially malicious sites. The document body is heavily obfuscated and contains no readable text, but the presence of many external URIs points towards a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9975

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
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.
QR-code redirect lure medium SE_QR_LURE

Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
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://crysiq.ru/uplcv?utm_term=mama%27s+baby+papa%27s+maybe+an+american+grammar+book+summary PDF link annotation
- http://hoachathoanggia.com/userfiles/file/xadujuseni.pdfIn PDF document text
- https://fulzugaskozpont.hu/files/93995168332.pdfIn PDF document text
- http://www.kymkarajok.net/tiedostot/files/fapewawo.pdfIn PDF document text
- http://sicilyontable.it/userfiles/files/40820886211.pdfIn PDF document text
- https://kemxoi.vn/app/webroot/files/images/pages/files/62777547005.pdfIn PDF document text
- http://kammed.com/userfiles/file/dasujiniwigozif.pdfIn PDF document text
- http://esistore.be/userfiles/file/gimetovowidifori.pdfIn PDF document text
- http://homeopathyhongkong.cn/files/75894880005.pdfIn PDF document text
- http://mentaplywood.com/images_upload/files/wexiwidijekufak.pdfIn PDF document text
- https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/1b663f467215b797c31fce44fae0dcfe/kajatemamatipibulusove.pdfIn PDF document text
- https://plasy.com/uploads/file/rajofirowitub.pdfIn PDF document text
- https://elearning-chemistry.ro/userfiles/file/76029602002.pdfIn PDF document text
- http://londonjip.com/userData/board/file/lezom.pdfIn PDF document text
- http://usaoxin.com/userfiles/2021-9/file/dizukajapegusi.pdfIn PDF document text
- https://www.spoton.pet/wp-content/plugins/super-forms/uploads/php/files/go9rac83270j7sbashpp5sv877/955146193.pdfIn PDF document text
- http://innovad-ltd.com/userfiles/file/18365330361.pdfIn PDF document text
- http://mediaworld.pro/ckfinder/userfiles/files/fefibujidoretikutelekev.pdfIn PDF document text
- https://nutstudio.it/userfiles/file/95803295359.pdfIn PDF document text
- http://jedzenie365.pl/ckfinder/userfiles/files/tidoxiderud.pdfIn PDF document text
- http://emke.hu/uploads/ckfinder/userfiles/files/wekijabi.pdfIn PDF document text
- https://moyaexpresss.com/ckfinder/userfiles/files/simevabuniwurosude.pdfIn PDF document text
- http://dorapeyzaj.com/userfiles/file/gosuzuke.pdfIn PDF document text
- http://strategie-online.net/catalogue_dynamique/file/79188427408.pdfIn PDF document text
- http://ddservice-bmw.pl/userfiles/file/20524846798.pdfIn PDF document text
- http://stopguepes72.fr/userfiles/file/64372415193.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_off0000d55f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD55F	17484 bytes
SHA-256: `dd8b04ccf4d900390d6220f926c40c57f12ea1aaef9a456ec2b469b53f0d2059`
`font_01_sfnt_off00010244.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10244	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011a5b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11A5B	11044 bytes
SHA-256: `e67b1e8c52bc2d92c51d6bbd697c5ad86c31a73b37f5df2478fb9c30e409cc36`

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