PDF malware analysis — malicious · 846eb84a3b69d69d

MALICIOUS

PDF

78.7 KB Created: 2021-03-16 09:47:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23

MD5: 06f303c61822c4079367be1f6b549106 SHA-1: 2750fc189979bdfa54ba586b379ef07acfe49671 SHA-256: 846eb84a3b69d69d935372f1de9841958e0a91560294bb421d249d09fabeaea9

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many pointing to disposable domains, characteristic of a link farm or SEO manipulation scheme. The ClamAV detection and ML classifier strongly indicate malicious intent, likely to redirect users to phishing or malware hosting sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to exploit users through redirection.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

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
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
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://jottigo.ru/wix?keyword=bushnell+binoculars+repair+manual PDF link annotation
- https://nunipotewisi.weebly.com/uploads/1/3/4/8/134892443/408f561e169.pdfIn PDF document text
- http://ramuwesitavoz.mywebcommunity.org/sedonuxo.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470552/normal_6046c19251417.pdfIn PDF document text
- http://wivupivipewezap.mygamesonline.org/biozone_ib_biology_student_workbook.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4382003/normal_5ff060f832571.pdfIn PDF document text
- https://jetosiwer.weebly.com/uploads/1/3/4/7/134767378/4832895.pdfIn PDF document text
- https://fudukonuxevefez.weebly.com/uploads/1/3/4/6/134606022/3125848.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://www.daltonmaag.com/In PDF document text
- https://uploads.strikinglycdn.com/files/7e54cee4-a21e-43ce-a3fb-41ddb42dd26a/blood_in_my_eye_george_jackson_uk.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/142fe37e-08ea-441f-a7a7-90b0160695c8/noboborokotiva.pdfIn PDF document text
- https://s3.amazonaws.com/kopisigapub/amman_movie_1995_free.pdfIn PDF document text
- https://s3.amazonaws.com/didowugorokirug/why_did_america_help_korea.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/fc6791ae-4ccd-4781-b012-adb631814dc6/33357112726.pdfIn PDF document text
- https://s3.amazonaws.com/marimejerebo/steam_speed_going_up_and_down.pdfIn PDF document text
- https://s3.amazonaws.com/fibesezati/risidekikidewupavesures.pdfIn PDF document text
- https://s3.amazonaws.com/bulolimepol/53379945400.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/500bb7fc-10fe-405d-97a8-640337c1815a/oxford_english_dictionary_offline_free_download_for_windows_10.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/89e363fa-6018-49d6-950e-c4dd5c5205f1/zutugapizisevomativazewez.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/2f9fbd3b-7f52-459f-9e52-5edd3be6e4ef/muvivojizipimaxes.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000eb7d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB7D	5164 bytes
SHA-256: `839d1ad90075b3ee0482f5a1776bebeb19c54780b553fee910247e5ad0139c82`
`font_01_sfnt_off0000fcc6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCC6	10192 bytes
SHA-256: `2d74c5d1ed364f4164799b6263a7ed2d235ad269103407c3140f7c51e870fed1`
`font_02_sfnt_off00011fac.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11FAC	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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