PDF malware analysis — malicious · 6d03c85dedc18a73

MALICIOUS

PDF

75.6 KB Created: 2021-09-17 05:52:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24

MD5: 17750372c7f2757d9004aca05885892e SHA-1: 73547f1584d5076361e0fa01d311fd92119afdda SHA-256: 6d03c85dedc18a732cebc9ba9f2ffaeb8df5f7d22beff8bba1812af4dafdedb2

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a phishing lure. The presence of numerous disposable URLs and the 'Password-protected archive handoff' heuristic suggest the document's purpose is to trick users into downloading an encrypted payload. No scripts were extracted, but the PDF structure itself likely facilitates the redirection to these malicious URLs.

Machine Learning

Nyx PDF Classifier malicious score 0.9953

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://huntic.ru/uplcv?utm_term=project+igi+mobile PDF link annotation
- https://termoformat.md/img/files/mimivaxuxinewev.pdfIn PDF document text
- https://mgc.to/sites/web/upload/files/gumulagedisoxokefigi.pdfIn PDF document text
- http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16136be7cdab48---xixojurabuweti.pdfIn PDF document text
- https://e-casainteligenta.ro/userfiles/file/sogamorazupujedeluwa.pdfIn PDF document text
- http://ngocvietbungalow.com/upload/files/xevazitonexaxukogulofoza.pdfIn PDF document text
- https://sistemagestiondpr.co/userfiles/file/raravune.pdfIn PDF document text
- https://harmony-lazienka.pl/Upload/file/36421505684.pdfIn PDF document text
- http://xn--90afqerdlt1f.xn--p1ai/admin/ckfinder/userfiles/files/72547763168.pdfIn PDF document text
- https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/161415dde76442---56298407880.pdfIn PDF document text
- http://bmcnx.com/userfiles/file/17532965970.pdfIn PDF document text
- http://nelly-design.ru/upload/files/zikenibepit.pdfIn PDF document text
- http://carrozzeriabosini.net/userfiles/files/luxegotilujedawediwiri.pdfIn PDF document text
- https://drosamahetta.com/userfiles/file/20526780667.pdfIn PDF document text
- http://interface-referencement.com/userfiles/file/dizupa.pdfIn PDF document text
- http://longarmquiltingacadamy.com/fckeditor/userfiles/file/bukedoz.pdfIn PDF document text
- http://pensionpoint.cz/userfiles/files/33665294018.pdfIn PDF document text
- https://strefaokazji.pl/uploaded/file/36906017964.pdfIn PDF document text
- https://carcable-bg.com/uploads/pictures/files/suvegegaginisesitira.pdfIn PDF document text
- https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/afc7968a8b8299d0cc0cb4556c0269ef/17134577988.pdfIn PDF document text
- http://cn-biyoute.com/d/files/77329724780.pdfIn PDF document text
- http://pphjako.pl/userfiles/file/wusigojiniderujegener.pdfIn PDF document text
- http://ricettebiagi.it/uploads/assets/file/bugasasufazefo.pdfIn PDF document text
- http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/pilagetoju.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_off0000c4a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC4A3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000dcb5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCB5	17488 bytes
SHA-256: `967e6b8171bcc311c06d5a2baed625796d74af11a6de2f216e12c89ecf4c8d00`
`font_02_sfnt_off000109bd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x109BD	10412 bytes
SHA-256: `62a6cb59bc9f3ee341372ac7a608de37987bc02bf32f066b96f1d781f9dceea1`

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