PDF malware analysis — malicious · 4cb3050ea5d8024a

MALICIOUS

PDF

77.2 KB Created: 2021-03-14 22:30:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: d831f9d4d0d67360a9ee4181db133578 SHA-1: 719ea8c1381b7e5b41e4fbdf001f9793c494e742 SHA-256: 4cb3050ea5d8024ae6187f03900909fdc8252913d28f0710930b9f75a92855b0

96 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was detected as a malicious PDF by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs that lead to external resources, suggesting it's used to redirect users to potentially malicious sites for phishing or malware delivery. No scripts were extracted, but the presence of multiple suspicious URLs points towards a social engineering attack.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://dafemum.ru/strik?utm_term=apm+project+management+qualification+%2528pmq%2529+study+guide+%25287th+edition%2529+pdf
- http://bixifofagowezi.22web.org/meal_plan_template_google_sheets.pdf
- https://cdn.sqhk.co/zenekukera/eHxjjjh/top_free_usa_dating_apps.pdf
- http://com-signto6.xyz/83668210393gw7yr.pdf
- https://cdn-cms.f-static.net/uploads/4472198/normal_6017245d348e0.pdf
- http://pagipuniluti.iblogger.org/pimufodelofilesox.pdf
- http://tehnopolis.org/558006358131x3dz.pdf
- https://cdn.sqhk.co/panafilaputu/fvUijja/34477027115.pdf
- http://mavito.online/480933585875p58k.pdf
- https://cdn-cms.f-static.net/uploads/4415946/normal_6015c960006d5.pdf
- http://xteenware.online/adele_someone_like_you_chords_ukuleleb6bso.pdf
- http://kpupnov.pro/badupogiwikupezajtk8me.pdf
- http://hangzhoumetal.ru/jokekugowokizawunewen5ke68.pdf
- http://all-gopro.com/74994374957r6uz1.pdf
- http://meetsol.xyz/bumper_io_apkibpcw.pdf
- http://usesalle.xyz/98187569424ql211.pdf
- https://cdn-cms.f-static.net/uploads/4380413/normal_604b90aa78afd.pdf
- https://cdn.sqhk.co/papusabefo/kjbghif/perufobedovonexomura.pdf
- https://static.s123-cdn-static.com/uploads/4409796/normal_5fec1d84da639.pdf
- http://azorocheat1.xyz/rapadadawapitjrm9f.pdf
- http://www.ascendercorp.com/
- http://www.ascendercorp.com/typedesigners.html
- http://vizawog.epizy.com/bifaseb.pdf
- http://rijewetevoxo.rf.gd/what_is_a_sister_quotes_and_poems.pdf
- http://www.w3.org/1999/02/22-rdf-syntax-ns#
- http://purl.org/dc/elements/1.1/
- http://ns.adobe.com/pdf/1.3/
- http://ns.adobe.com/xap/1.0/
- http://ns.adobe.com/xap/1.0/mm/
- http://ns.adobe.com/xap/1.0/rights/
- http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000eef1.bin` `d974e754e5c91d18b8ab2814228693f87e71c2abee540d7f1e03dfbdd5da9b8f`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEEF1	6096 bytes
`font_01_sfnt_off000103a3.bin` `f70cf6f4e0bee98f2eba184d5ac869ec75a4c2e001a0d8e3b7f2839921b6668c`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103A3	10216 bytes

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