PDF malware analysis — malicious · 992c8896bd7ca4ea

MALICIOUS

PDF

80.5 KB Created: 2021-03-24 13:44:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: bf84d19f6efda8114322cf176fb517e0 SHA-1: ed42a316b4d663fe02a4d8379adb11b871eec37f SHA-256: 992c8896bd7ca4eaecb8b868570d8bf13ab0ea6407d8dbc8e8a23329a507bf20

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, with one prominent URL suggesting a phishing lure related to academic content. The document body, though heavily obfuscated, contains references to search terms and the authoring application, indicating an attempt to disguise its malicious intent.

Machine Learning

Nyx PDF Classifier malicious score 0.9991

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://baarspo.ru/award?keyword=bayesian+statistics+and+marketing+pdf PDF link annotation
- http://servempieza.site/dukenepokenusarfz23z.pdfIn PDF document text
- http://vozivovog.scienceontheweb.net/voodoo_hoodoo_2015_review.pdfIn PDF document text
- http://ecosbor.net/warhammer_inquisitor_martyr_psyker_guide9drdq.pdfIn PDF document text
- http://businesshelpservice.com/51989378766a3w5g.pdfIn PDF document text
- http://trokot-roznica.xyz/dipazumd5i.pdfIn PDF document text
- http://jorowijedo.mywebcommunity.org/wevuvixivetisanafoju.pdfIn PDF document text
- http://nowtorrentz.com/the_complete_green_letter_book_lovefss3n.pdfIn PDF document text
- http://pusapev.scienceontheweb.net/ashish_singh_lecture._com_download.pdfIn PDF document text
- http://ayazshabutdinov.club/66450893413koem0.pdfIn PDF document text
- http://indir-kazan.com/desejerumewevuar3vs.pdfIn PDF document text
- http://douchehq.xyz/international_management_case_study_answersf62vz.pdfIn PDF document text
- http://lenudes.com/how_are_atoms_held_together_in_a_solid_potassium_metalu42eg.pdfIn PDF document text
- http://gbarb.me/7640082406h6wgo.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
- https://be5a03d2-cb36-429a-bb4d-4773f067dd3b.filesusr.com/ugd/b46ca8_89572d1d1b4d497db0ba2e943d852f44.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/taturi/limukoxubipi.pdfIn PDF document text
- https://s3.amazonaws.com/figugipopar/dbx_166xl_compressor_user_manual.pdfIn PDF document text
- https://72be5e1b-4d14-4335-96ee-88463f604c48.filesusr.com/ugd/57ecfe_5bfe29ef41314fcea92a6192afd2b61d.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/sefepugolupalax/android_7._1_factory_reset_password.pdfIn PDF document text
- https://da18e6a8-d720-42de-a88c-3f13daad7efb.filesusr.com/ugd/08fe48_b05a48627d814a08ac95b360c6428b5b.pdf?index=trueIn PDF document text
- http://pogetowem.onlinewebshop.net/avivamento_no_pais_de_gales_livro_gratis.pdfIn PDF document text
- https://f803bf1b-e1c2-47f6-a41f-c9785c88fbd4.filesusr.com/ugd/bf07b1_dec85db83e4646edb9a29994b97b3164.pdf?index=trueIn PDF document text
- https://86908e24-11f3-43a1-9346-bf531f45ee0b.filesusr.com/ugd/97493d_3b46ff3dd1d740d785d695f27c530680.pdf?index=trueIn PDF document text
- http://rukosivujuxu.atwebpages.com/46073402799.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_off0000ee44.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE44	5336 bytes
SHA-256: `f3d6841c85f3e705a17785c24003d2c07f73b115140f2e18dfe40630ad10888f`
`font_01_sfnt_off0001005d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1005D	11232 bytes
SHA-256: `722443959bfdc13c7859689abecea28ec7fcf035d5eb78bef601967235daf89c`
`font_02_sfnt_off00012644.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12644	4324 bytes
SHA-256: `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`

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