PDF malware analysis — malicious · 3584762ea8a9ed96

MALICIOUS

PDF

86.7 KB Created: 2021-04-07 06:25:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27

MD5: 45e037b44ecee770934fc8baf767c69b SHA-1: e55644d7dd0b93d931f7cb2975421b4562856da6 SHA-256: 3584762ea8a9ed9663dc809723f723ff57aeee2a37da27aa7c730a442fc003cb

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a significant number of external links, many pointing to disposable hosting, indicating a link farm or SEO poisoning tactic. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9992

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://fokemale.ru/123?utm_term=kcet+2018+answer+key+chemistry PDF link annotation
- https://tezifotunojoke.weebly.com/uploads/1/3/0/7/130776805/nezidipenif.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4392867/normal_5fddd5cf5859b.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4489407/normal_6054cfe80af47.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4484610/normal_6019966d0e7c1.pdfIn PDF document text
- http://sosed.market/indian_navy_mr_syllabus_in_hindip2or3.pdfIn PDF document text
- http://persequen.com/gojizavelagibetexizomatylqwk.pdfIn PDF document text
- http://hq-cleartv.info/what_foods_help_reduce_high_blood_pressure6i2f5.pdfIn PDF document text
- https://varovugunigode.weebly.com/uploads/1/3/4/4/134480676/menifusanifuj_bovilagenopana_nukezotuzuruk_gosig.pdfIn PDF document text
- https://duvutonog.weebly.com/uploads/1/3/6/0/136020002/06074a217b84ef1.pdfIn PDF document text
- https://wadasazaba.weebly.com/uploads/1/3/3/9/133999184/cea8d0a0ad79770.pdfIn PDF document text
- http://vuwobide.22web.org/subject_and_predicate_worksheet_grade_2.pdfIn PDF document text
- https://tefovaxosu.weebly.com/uploads/1/3/1/1/131163863/bb16ceda8c1f18.pdfIn PDF document text
- https://wiwojuzikog.weebly.com/uploads/1/3/6/0/136050554/babowilidipufug.pdfIn PDF document text
- https://weligolujevis.weebly.com/uploads/1/3/4/7/134748453/6637023.pdfIn PDF document text
- https://verumoxozuvije.weebly.com/uploads/1/3/1/4/131407377/povegiluto_sododovivasepan.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4496148/normal_5fd32f7a19ad4.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4460975/normal_5fe8fbcc8f806.pdfIn PDF document text
- https://lovaxases.weebly.com/uploads/1/3/4/6/134685664/luwesu-lexivoja.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4402948/normal_605c6b5d6d05c.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://wafijoraw.rf.gd/20672455380.pdfIn PDF document text
- http://satelit.rf.gd/guida_turistica_cagliari.pdfIn PDF document text
- http://wamitut.epizy.com/problem_solving_in_social_workers.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
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f029.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF029	5432 bytes
SHA-256: `b54c3f585f9e9ab0d87da2628d3ce423623e6262fc4f81d4f5017791b64dc6b1`
`font_01_sfnt_off0001027b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1027B	11120 bytes
SHA-256: `8c36ea63e5cbeef08f21f897a4be405493871ebc12e50d8d0ef930d4cc5c9ba1`
`font_02_sfnt_off00012820.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12820	16172 bytes
SHA-256: `7f268005b80ff82e89639affb95403f55eddb42516abbde6a76e27226db124cd`
`font_03_sfnt_off00013d3e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13D3E	4324 bytes
SHA-256: `0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333`

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