PDF malware analysis — malicious · 34a1c08266cb5101

MALICIOUS

PDF

78.7 KB Created: 2021-03-15 23:31:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23

MD5: 45e4c00d69f3f0fb99b89c79a77fb144 SHA-1: d52dade2263fc13552360d8f8aa0555032b97887 SHA-256: 34a1c08266cb51010d8883e31396407061b8554935d7e9142e5b3cdb897e5b55

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external URIs, many hosted on disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The document body, though partially corrupted, suggests a lure related to 'helping students with dyslexia read', directing users to a suspicious URL. The presence of embedded JavaScript, indicated by the T1059.007 technique, likely facilitates the redirection to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9994

Heuristics 5

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 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://botokaw.ru/strik?utm_term=how+to+help+students+with+dyslexia+read PDF link annotation
- http://zelenege.iblogger.org/block_site_android_firefox.pdfIn PDF document text
- http://tikonazab.iblogger.org/browser_video_opera.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4384460/normal_602d005f0adb1.pdfIn PDF document text
- http://motawosofi.iblogger.org/samofip.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4379355/normal_5ffb51e65b11d.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4385410/normal_5fe4aff4dbe79.pdfIn PDF document text
- http://zemexulerum.iblogger.org/figasatesewakoz.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4376379/normal_604baa6b02df5.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4366050/normal_6041019faf81d.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://89d37d93-eaf9-4fc7-8d5e-07438b8f18e7.filesusr.com/ugd/e80f4c_3be39b212c3e4b9b940d507710cc8628.pdf?index=trueIn PDF document text
- http://kenavegolixase.epizy.com/siwawuzigijebifajuti.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/25bd91a2-eafe-448b-905d-65f29ea539c4/15020096497.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/aa10c0da-5111-4aa7-8c34-fbf3727bcc0a/zodijinakewokibubitojudo.pdfIn PDF document text
- http://zoruvalumupubi.rf.gd/67046889681.pdfIn PDF document text
- https://s3.amazonaws.com/lorugipopuxe/64264905289.pdfIn PDF document text
- https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_2dbe0bb296624cd2b1f2e8dde2753a42.pdf?index=trueIn PDF document text
- https://681956c7-2c57-495f-b996-d04b50c745b0.filesusr.com/ugd/907d98_7a3829813a4547a0bfd02ccc6938ca82.pdf?index=trueIn PDF document text
- https://3682d434-6e27-4ac8-9ac2-d3ec24fa429c.filesusr.com/ugd/9b5f63_eb0322ec1b6042b48045a6d9f8dd03cf.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/rojalexipokadaz/performance_review_sample_answers_for_employees.pdfIn PDF document text
- https://s3.amazonaws.com/dazuxujepov/how_much_does_a_first_class_international_stamp_cost.pdfIn PDF document text
- https://571cbd0a-ba82-408d-be6d-2df53a8fcfe5.filesusr.com/ugd/02af14_4ebdcccbe2b24ffca45ee0201886c804.pdf?index=trueIn PDF document text
- https://uploads.strikinglycdn.com/files/81524050-757a-4f66-8d01-74532ea8da5e/sushi_neko_las_vegas_50_off.pdfIn PDF document text
- https://s3.amazonaws.com/gowupuzokowuxes/ansi_ashrae_standard_62._1.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 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f6b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF6B9	5272 bytes
SHA-256: `a569191221fa29c75f7a476cf2c50e1dde967dc17d27713a0646b8cef8a79437`
`font_01_sfnt_off000108b0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108B0	10712 bytes
SHA-256: `61698de6cca136ccab16d265e67c39e57dbb262681e13d7bfd8b92492e20fbac`

Open this report in the interactive analyzer, or submit your own file for analysis.