PDF malware analysis — malicious · 555bd4d21b63dd5b

MALICIOUS

PDF

69.5 KB Created: 2021-10-03 08:56:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 008de724d6cd84c638835e3d1679de10 SHA-1: f63ced41bb4b408290f23d8ab833b9d16bf9e7fd SHA-256: 555bd4d21b63dd5b1492539fa9bffadc6588bb984920a794c6fc770e225dc249

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URLs, many of which are hosted on disposable domains and appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The PDF structure and embedded URLs indicate an attempt to lure the user to malicious content, likely for credential harvesting or further payload delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.9982

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://drafthe.ru/uplcv?utm_term=notice+of+retrenchment+letter+template+south+africa PDF link annotation
- https://www.bosingels.nl/ckfinder/userfiles/files/jobudabojolaxi.pdfIn PDF document text
- http://excitechem.com/userfiles/file/nuwuluwufilategenafan.pdfIn PDF document text
- http://kingtonkatsu.com/uploads/files/4564495509.pdfIn PDF document text
- http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1615877807f2ec---jibimumobon.pdfIn PDF document text
- http://elma-itc.ru/!upload/files/64700182089.pdfIn PDF document text
- https://mtestbd.com/assets/uploads/files/xirijurikebika.pdfIn PDF document text
- http://bdsps.org/slbdavbatala/userfiles/file/18967261108.pdfIn PDF document text
- http://atletika-pardubice.cz/files/file/33359730916.pdfIn PDF document text
- https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/161580eb1000ff---vaneziripake.pdfIn PDF document text
- https://petpetmates.com/files/editor/file/mafexuxurapagu.pdfIn PDF document text
- http://www.museopizarra.com/ckfinder/userfiles/files/bememufenovazifolata.pdfIn PDF document text
- http://aristosaigonhotel.com/uploads/files/kuziriw.pdfIn PDF document text
- http://cicm2015.mist.ac.bd/app/webroot/ckfinder/userfiles/files/14723772502.pdfIn PDF document text
- https://economiadecomunion.net/ckfinder/userfiles/files/mubaposegusitezixoto.pdfIn PDF document text
- http://mikailang.net/userfiles/file/20210929083726_1309510726.pdfIn PDF document text
- https://gulf-rope.com/images/bulk_images/files/timipugipisuludebo.pdfIn PDF document text
- http://portakalweb.net/home/portakal/public_html/ckfinder/userfiles/files/sumoxipojubuxa.pdfIn PDF document text
- http://ontozescentrum.hu/tmp/96909885286.pdfIn PDF document text
- http://seoulsquare.com/userfiles/file/sanitififemiji.pdfIn PDF document text
- https://mchs.kz/userfiles/File/21744681600.pdfIn PDF document text
- http://okna-kursk.ru/page_edit/_samples/userfiles/files/wumepanozobufiwemaredawa.pdfIn PDF document text
- http://henghuitong.com/jingkelun/userfiles/files/20210930233416.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_off0000b0d8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB0D8	10824 bytes
SHA-256: `408fdd953282b51a1a052b2d8b2c2ae6822f50867f6337e7118a77b8f13c24bb`
`font_01_sfnt_off0000c9a2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC9A2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000e1b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE1B4	15156 bytes
SHA-256: `160548dcecfcb991915e517c4eaf9793a4b4e6d7c1a00d708a888ce5b57c17c5`

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