PDF malware analysis — malicious · 11abb3b74960aeb5

MALICIOUS

PDF

70.5 KB Created: 2021-04-30 06:54:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: 9676055cecb049ab05d0d14344c07c2b SHA-1: bcd94a1033a7f61f49006e7c7c5b72544969b3da SHA-256: 11abb3b74960aeb50c5ff5ec2c84e014ef8e137eb09f359c26ecf2bf853b041a

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains a large number of embedded URIs, many of which point to disposable domains or use UTM parameters, suggesting a link farm or phishing lure. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly indicate an attempt to redirect users to potentially harmful websites.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

Heuristics 5

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.
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://leonvi.ru/strik?utm_term=thanos+infinity+gauntlet+toy+hasbro PDF link annotation
- http://geforiro.scienceontheweb.net/78156159527.pdfIn PDF document text
- http://tigafik.mygamesonline.org/english_speaking_eye_clinic_near_me.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4379731/normal_5fffeb2c4526f.pdfIn PDF document text
- http://wumiwuzigimo.mywebcommunity.org/rodalemaranapupewisefinil.pdfIn PDF document text
- http://fejiximodanu.mygamesonline.org/bbc_compacta_class_11_english_answers.pdfIn PDF document text
- http://likedizar.medianewsonline.com/computer_science_lecturer_books_free_download.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4446400/normal_6002972752ae2.pdfIn PDF document text
- http://pusapev.scienceontheweb.net/gubagolot.pdfIn PDF document text
- http://zedateve.mypressonline.com/sivos.pdfIn PDF document text
- http://konalofasu.mywebcommunity.org/20584229458.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- http://nuwadolonopip.onlinewebshop.net/gazodowulumamodibiral.pdfIn PDF document text
- https://s3.amazonaws.com/kopisigapub/valoracion_acido_base.pdfIn PDF document text
- https://s3.amazonaws.com/jujadodedaruxix/72573776731.pdfIn PDF document text
- http://jupegojut.atwebpages.com/71536768048.pdfIn PDF document text
- http://nizowozutagele.atwebpages.com/biometria_hematica_normal.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/57123021-5e9d-4a64-b916-f4f679c89b30/48615061319.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7b30980e-16e0-48d8-9a76-36688e5ee0a8/66816671925.pdfIn PDF document text
- http://zuzopejorexa.onlinewebshop.net/romaine_bilingualism.pdfIn PDF document text
- https://s3.amazonaws.com/xupimaral/ponitesabasekevegovimexo.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2a1cbe31-50d4-4b37-baac-a0a20cc991f6/39487474531.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/323c0b01-2344-4e76-a12a-bd6d71eb17b2/64895982808.pdfIn PDF document text
- https://s3.amazonaws.com/foneniz/holly_goldberg_sloan_counting_by_7s_movie.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000c9eb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC9EB	5104 bytes
SHA-256: `31036658b46011334396f58dfffb832efde5e7e3c495c3e6c4af3e182dea731c`
`font_01_sfnt_off0000db41.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDB41	10332 bytes
SHA-256: `a738f0802bce6c6e73da098ffcfceb77b377c4b096fb24fee86b087f3a427fda`
`font_02_sfnt_off0000fe9b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFE9B	4324 bytes
SHA-256: `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`

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