PDF malware analysis — malicious · 6b450a323b0ec471

MALICIOUS

PDF

81.3 KB Created: 2021-03-18 23:41:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 23c615cca66bc4dbe9e212bcf9d4b263 SHA-1: 57d4985c3417d5c27c43262151067e5256d66c8e SHA-256: 6b450a323b0ec47147486e8413f7d41c931c357b66d795ab50d66aec67167754

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, with one prominent URL pointing to 'maypoin.ru' and suggesting a lure for 'english speaking mp3 free download'. The PDF structure and the presence of external URIs indicate an attempt to redirect the user to a potentially malicious site, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9989

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://maypoin.ru/strik?utm_term=english+speaking+mp3+free+download PDF link annotation
- https://cdn-cms.f-static.net/uploads/4457561/normal_602fa234e09d7.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4391621/normal_5fff40abbaa8f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4460968/normal_600eb95c6647a.pdfIn PDF document text
- http://lijovafe.22web.org/38203975319.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4457281/normal_5fd671a584be1.pdfIn PDF document text
- http://creditscorecard.info/nefozamivufomemkybg.pdfIn PDF document text
- http://bunnygummy.ru/how_to_set_a_armitron_watch_to_military_timew225c.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4464735/normal_5feb69dfc5691.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4502245/normal_604fc3eb8a4ca.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4413475/normal_5fffc83cac463.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4383804/normal_5ff63abb6fa4f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4451762/normal_6041f9cd65b01.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4464707/normal_604b949300953.pdfIn PDF document text
- http://whitecheat.xyz/37186455749omoi4.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4368504/normal_5ff6be188c385.pdfIn PDF document text
- http://xbet1.fun/frigidaire_washer_dryer_combo_not_drainingnhnzi.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4387816/normal_602490753ca3f.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4444115/normal_5fca07a7a3f66.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
- http://vasedazixi.rf.gd/jofitipigajizelisag.pdfIn PDF document text
- https://s3.amazonaws.com/lopadivupudexa/lung_cancer_screening_canadian_guidelines.pdfIn PDF document text
- http://viwefar.rf.gd/toyota_a3_problem_solving.pdfIn PDF document text
- https://s3.amazonaws.com/wemazun/32301335588.pdfIn PDF document text
- https://s3.amazonaws.com/wajufifenoxuj/teresigegokekajo.pdfIn PDF document text
- http://ratudafoxivux.rf.gd/google_forms_templates_free.pdfIn PDF document text
- https://s3.amazonaws.com/fizup/99618497824.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_off0000f17f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF17F	5440 bytes
SHA-256: `f288c5664aefde0f3cc74af5f15f1a0ef2351ef84a34969f33094d28d87eb6bd`
`font_01_sfnt_off000103db.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x103DB	11184 bytes
SHA-256: `442921dcbd1567294e1f9e9b2b7e4c1b6aca948f7174c5a596e4c87e99b0a892`
`font_02_sfnt_off000129a5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x129A5	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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