PDF malware analysis — malicious · b9f9ef37a365b23c

MALICIOUS

PDF

76.9 KB Created: 2021-09-13 02:06:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29

MD5: ddbdf67cc513e661bddb917e93a82af7 SHA-1: d7d427095f72964d00aa41514298072c184d8d1d SHA-256: b9f9ef37a365b23c6b9e98ef4a728d1a7eb3e5c93999c5d1098ac5fb6a2fa98d

166 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF was flagged by a machine learning classifier and ClamAV as malicious, with specific heuristics indicating it's a password-protected archive lure and a link farm. The embedded URLs, while numerous, do not directly indicate a specific malware family. No scripts were extracted, limiting the analysis of direct execution or payload delivery mechanisms.

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 http://dycelife.com/userfiles/file/zopoxurulevabikolad.pdf In PDF document text
- https://swagath.co/new/ckfinder/userfiles/files/23211389847.pdfIn PDF document text
- http://oralrem.kz/ckfinder/userfiles/files/dafejonimimelepizovaxaniz.pdfIn PDF document text
- https://fpcofmacon.com/nbloom/fckuploads/file/zabitefijajuna.pdfIn PDF document text
- https://samavetpharm.com/userfiles/files/suzamiluzojir.pdfIn PDF document text
- https://gobelsprofil.com/upload/files/xavurejurutuxifigezofo.pdfIn PDF document text
- https://ozanetiket.com/TasarimAcarnet/serhali/upload/files/92980219633.pdfIn PDF document text
- https://igruppe.no/ckfinder/userfiles/files/todizidoxijipepasifogor.pdfIn PDF document text
- https://beldaoyun.com/calisma2/files/uploads/11783760421.pdfIn PDF document text
- https://electroagro.es/pub/files/zoxemibesivolekebesad.pdfIn PDF document text
- http://gadkowski.pl/repository/filemanager/file/wulaxekoposos.pdfIn PDF document text
- http://ambulatorioveterinariorigolon.eu/userfiles/files/74723904270.pdfIn PDF document text
- http://munnarinfo.in/userfiles/file/32646416535.pdfIn PDF document text
- http://gfb.it/upload/fck/file/kijubatogamidemopasa.pdfIn PDF document text
- https://livredart.com/ckfinder/userfiles/files/wirefaferukegidig.pdfIn PDF document text
- http://mrybalko.ru/files/xisamamatukaduzikogaji.pdfIn PDF document text
- http://sichera.eu/userfiles/files/10877337405.pdfIn PDF document text
- http://secondhandgraphics.com/usrfiles/file/67474107285.pdfIn PDF document text
- https://malashealthcare.com/userfiles/files/biruzageloroneguvu.pdfIn PDF document text
- https://aucordechasse.fr/vosImages/5549821548.pdfIn PDF document text
- http://tecresconsolidamentorestauro.it/fck_data/file/megagemufakeroxaro.pdfIn PDF document text
- http://centralgiving.com/media/userfiles/file/63005467497.pdfIn PDF document text
- http://randoquad72.fr/userfiles/file/kenererejozilivapuko.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=apps+installing+themselves+androidPDF link annotation
- https://forums.androidcentral.com/showthread.php?t=365217&s=be4ac974b8e763b15301cca83ea00e06&p=34735In 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
- https://forums.androidcentral.com/showthread.php?t=365217&s=be4ac974b8e763b15301cca83ea00e06&p=34735In 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_off0000c6f4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC6F4	17744 bytes
SHA-256: `1c503bcd23b18d32aab6d8b11f8a0dcace6538382aba88594e28b6ab1091ac57`
`font_01_sfnt_off0000f56c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF56C	10888 bytes
SHA-256: `b547df65f2536fa838273bdda926d6ae63be2916a6c3b4bf0adfc84c6f043f05`
`font_02_sfnt_off00010e3c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10E3C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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