PDF malware analysis — malicious · 47809ee08c2410e5

MALICIOUS

PDF

71.9 KB Created: 2021-10-07 07:27:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31

MD5: 47414ed3b8ecc82fe106a9ab733803ef SHA-1: 6b5a139517ed28765d540de44158e33aad0d4d36 SHA-256: 47809ee08c2410e5302b442eab73599142d18d96bef45d3552a2cb9545c1c281

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to link farms on disposable hosting, a common tactic for phishing and malware distribution. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to open a password-protected archive, a method to evade gateway scanning. ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. No scripts were extracted, but the overall pattern suggests a phishing or malware delivery attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.9916

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
Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE

Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
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://infrive.ru/uplcv?utm_term=guns+of+glory+building+costs PDF link annotation
- https://www.webhisto.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613d70511c8b7---33814609379.pdfIn PDF document text
- https://giasidaily.com/uploads/userfiles/file/xibodegusiritixarab.pdfIn PDF document text
- http://cuboni.com/uploadfile/hong202109091156079541.pdfIn PDF document text
- https://jf-orvalho.pt/userfiles/file/47209726111.pdfIn PDF document text
- https://almudenafernandez.co/ckfinder/userfiles/Files/90212590116.pdfIn PDF document text
- http://0048.pl/48files/file/25490878257.pdfIn PDF document text
- http://sys-svinding.dk/userfiles/file/96947128905.pdfIn PDF document text
- https://tfpac.com/nbloom/fckuploads/file/wujibot.pdfIn PDF document text
- http://newbiesites.com/userfiles/file/kuvulonelipi.pdfIn PDF document text
- https://jaurrieta.net/USERFILES_JAURRIETA/files/54165740828.pdfIn PDF document text
- http://grgct.com/ckfinder/userfiles/files/dekomulagugezes.pdfIn PDF document text
- http://unibox.lv/files/text/xagujipibonikoxev.pdfIn PDF document text
- http://leadingedgecorporate.com/user_images/file/9999155323.pdfIn PDF document text
- http://a-mega.ua/images/uploads/file/pakexamonuz.pdfIn PDF document text
- http://cgemfoco.com.br/ckfinder/userfiles/files/76778325657.pdfIn PDF document text
- https://sistemagestiondpr.com/userfiles/file/44806919052.pdfIn PDF document text
- http://biogenetec.tw/image/files/20210905_213753.pdfIn PDF document text
- https://centaur.vri.cz/docs/files/74090322816.pdfIn PDF document text
- http://ufcnagykanizsa.hu/userfiles/file/1180510352.pdfIn PDF document text
- http://koddous.com/userfiles/file/24890103120.pdfIn PDF document text
- http://kcemsp.org/upload/editor/file/42270581472.pdfIn PDF document text
- http://bowie.abwingsmd.com/uploads/files/xelumumoxakupudil.pdfIn PDF document text
- http://hairfibers24.com/upload/file/51072180.pdfIn PDF document text
- http://www.abcklima.hu/data/editorfile/15490401878.pdfIn PDF document text
- http://phongthuyphatloc.com/luutru/files/xixuragudile.pdfIn PDF document text
- http://roletyhanarol.pl/files/file/74380410598.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_off0000bac9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBAC9	10748 bytes
SHA-256: `c51412fe7457509b602311658f99c79434c5a754e30dceda8f1588dc360f117f`
`font_01_sfnt_off0000d377.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD377	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000eb89.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB89	15024 bytes
SHA-256: `82ec7f3013665693760d1004c0d49536adf4ff2571f97356c1544eedce7853f8`

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