PDF malware analysis — malicious · bcbff36ae1fa5d42

MALICIOUS

PDF

104.0 KB Created: 2021-05-17 17:03:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21

MD5: 80dfd61912f1a1d99f22f399c5581043 SHA-1: 235b526cf152d17d3a5ee31b99b169a60e8d1e26 SHA-256: bcbff36ae1fa5d420a145fdb4dcec15dde379f90103ce989f556503c08cbe15a

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous embedded URLs, many pointing to disposable domains and identified as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9986

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+put+in+polaroid+film+600 PDF link annotation
- https://cdn-cms.f-static.net/uploads/4413718/normal_602afc8a8c492.pdfIn PDF document text
- http://fomigiv.mypressonline.com/43198147439.pdfIn PDF document text
- http://datingsexchat.site/768016128305f40f.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4415321/normal_6047482296873.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4369316/normal_5fe3108762a4c.pdfIn PDF document text
- http://spainwow.pro/how_to_play_chess_for_the_beginners8vlro.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4404112/normal_603c87f7226c7.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4485800/normal_604cdd007c9f4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413719/normal_602d2bb100dc8.pdfIn PDF document text
- http://vuwefedope.sportsontheweb.net/epson_wf_2630_not_working.pdfIn PDF document text
- http://xulodol.mygamesonline.org/takodizijiwap.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4386837/normal_6019f0d7dbfec.pdfIn PDF document text
- http://asta-stroy.ru/xusuzu9dykr.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4426549/normal_603d21bab85dd.pdfIn PDF document text
- http://italonewsero.site/79158407733034a5.pdfIn PDF document text
- http://generatorsale.ru/17276906007g8d4z.pdfIn PDF document text
- http://veviwumifuvemuz.mypressonline.com/cancionero_de_folklore_para_guitarra_criolla.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://uploads.strikinglycdn.com/files/012ca6a7-23d6-4489-9cd9-26e3b3d70ab2/ruger_air_hawk_elite_2_parts_list.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/c2aa3160-67a0-4c39-ac60-5e915cf730a6/99416980880.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ffdd4fa5-7cc5-4272-aad8-800d16ebde72/400_microgramos_a_mg.pdfIn PDF document text
- http://fuvuvadut.onlinewebshop.net/is_sudden_high_blood_pressure_a_symptom_of_covid_19.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/6d3f971e-b24e-4da9-a439-390fc55da8f9/can_i_go_to_any_dps_office_to_renew_my_license.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/f8ec56c1-7020-4d12-acbf-8d1594bde540/33842604456.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/7d6524e2-0b52-4b1f-aafc-ec9a1774d9ac/par_quoi_remplacer_le_beurre_de_cacao.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_off000139e3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x139E3	8388 bytes
SHA-256: `153e9a5bf5a3325992cc06904416aae9743c626a2bfab1c5efeab88cdd4e7609`
`font_01_sfnt_off000155f1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x155F1	5360 bytes
SHA-256: `f151bec1952a05c1141ceaa606ebc655e558cf785b34ba6fce022ac27a4fbbdf`
`font_02_sfnt_off00016826.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16826	12272 bytes
SHA-256: `6281008fb5e7de9b714207dac1a49f54ee42f4ee7b536f21ca6bdf1b095f6086`

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