PDF malware analysis — malicious · 9a5e146d7609d182

MALICIOUS

PDF

80.0 KB Created: 2021-05-28 13:12:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-28

MD5: dcc7ee61af2d3349bc187b21bdb5a4ac SHA-1: a17ac09489b727629d90811cc0a7eef14a26bb25 SHA-256: 9a5e146d7609d1823eb4d18e31c29cd14a68ccf1e04eb52fc20516c36cfefc42

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting a link farm or phishing attempt. The primary malicious URL identified is https://botokaw.ru/strik, which is presented as a download link for 'Videoder download per iphone'. No scripts were extracted, but the PDF structure and numerous external links point towards a phishing or malicious redirection scheme.

Machine Learning

Nyx PDF Classifier malicious score 0.9996

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 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.
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=videoder+download+per+iphone PDF link annotation
- https://kawuloxegulul.weebly.com/uploads/1/3/4/3/134389306/joxab-kexiwiwazogonu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4453720/normal_5fd0a1db49742.pdfIn PDF document text
- https://pijagifodila.weebly.com/uploads/1/3/4/3/134308300/bikozoroketami.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4413368/normal_601e1e1490af6.pdfIn PDF document text
- https://tozupetap.weebly.com/uploads/1/3/1/3/131383790/5509057.pdfIn PDF document text
- https://milanabez.weebly.com/uploads/1/3/2/6/132695465/d80ff2395c47.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4470221/normal_6020612ed1d9a.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4461777/normal_6058433850459.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4457011/normal_602c3c563adcf.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4457296/normal_6058891d69cbe.pdfIn PDF document text
- https://lewimovi.weebly.com/uploads/1/3/4/3/134311482/a4d01.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/0e9203e8-ad69-41be-9a5a-04c0648f6029/notary_signing_agent_certification_study_guide_2020.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e4e37481-e2e1-4a43-9c33-eb91cb3c72a9/171046937.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/ef952119-700a-4d8b-b497-e576350ba0d8/vocabulary_context_clues_worksheets_6th_grade.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e3781085-1b22-4d03-bd38-9fe936787272/pubagutamalis.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e0473381-8e07-47dc-b3f6-ffd1b5820e3d/should_my_24_month_old_be_talking.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/236592a6-9db1-407e-91a0-0c50329874c6/how_many_books_in_the_witchlands_series.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/e4a74e62-a2bc-40de-a85e-7471fe0d35fa/33504704326.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/a6781184-fddf-4b29-8117-eab0fafb27ed/13997073693.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5688b7a0-3880-44f0-aba5-4f298f9cf05f/lista_de_verbos_irregulares_en_ingles_con_traduccion_y_pronunciacion.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/97198dd1-26e0-4fca-824f-11f5cfc50758/shirley_jackson_books.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_off0000ef24.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEF24	4636 bytes
SHA-256: `b844420fca333463ceae5bec2894fe6a1b2332f8420e6441a569ff216e8a53af`
`font_01_sfnt_off0000fed5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFED5	11048 bytes
SHA-256: `2964e2092b05164b8d03cecc80c818f5a707fa68ba34f78bed944bf13f2927ec`
`font_02_sfnt_off00012492.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12492	4324 bytes
SHA-256: `a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f`

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