PDF malware analysis — malicious · e37e0ac0d2e721fb

MALICIOUS

PDF

82.9 KB Created: 2021-04-08 13:02:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: b7498c83365b06bca356034c995f5680 SHA-1: 24e661b5246a2593f05bb0db521e298193171af9 SHA-256: e37e0ac0d2e721fba4a559cb1b04867d0578777d58f2431cb98bea15f4f178a8

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The embedded URLs point to sites that may host malicious content or redirect to phishing pages.

Machine Learning

Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/strik?utm_term=children%2527s+tamil+stories+free+download PDF link annotation
- https://gidunixodon.weebly.com/uploads/1/3/5/3/135322071/regabo.pdfIn PDF document text
- https://butiziro.weebly.com/uploads/1/3/4/3/134308177/9738583.pdfIn PDF document text
- https://vusugurubem.weebly.com/uploads/1/3/0/9/130969976/555aa9f311a0635.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4414334/normal_603e0a454a466.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4421215/normal_5ff68570e7567.pdfIn PDF document text
- http://giwitap.getenjoyment.net/le_petit_nicolas_film_netflix.pdfIn PDF document text
- https://birijoxumel.weebly.com/uploads/1/3/4/5/134587798/c5df5c6ae5e6022.pdfIn PDF document text
- https://folozulo.weebly.com/uploads/1/3/5/3/135351090/jopen_jinumilisepuzo_masuwit.pdfIn PDF document text
- http://difuwikikum.iblogger.org/camden_county_technical_school_salary_guide.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4405925/normal_6056aa31af18a.pdfIn PDF document text
- https://tasoxagizuj.weebly.com/uploads/1/3/4/7/134734804/d4feb421.pdfIn PDF document text
- https://poxagubojawi.weebly.com/uploads/1/3/1/4/131482812/e0ee1ae07485.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://gatinilub.epizy.com/gurarewufu.pdfIn PDF document text
- http://faxupinunuwup.epizy.com/wukita.pdfIn PDF document text
- http://jemuxopirale.rf.gd/blueprints_obstetrics_and_gynecology_7th_edition_free.pdfIn PDF document text
- http://wikukodukoja.onlinewebshop.net/luxawitobikazubodufus.pdfIn PDF document text
- http://figaniver.epizy.com/xulojigofidifutozuzari.pdfIn PDF document text
- http://suwisekuxowiw.epizy.com/ca_125_elevado_causas.pdfIn PDF document text
- http://dafifaxotodaraw.epizy.com/ada_2017_espaol_descargar.pdfIn PDF document text
- http://wuwedilejom.myartsonline.com/personal_branding.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_off0000f7a5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF7A5	5084 bytes
SHA-256: `36f2f7a221b42addda8ef25575a28e373d95d27a7f3c50e2ba98dfab1b3624f8`
`font_01_sfnt_off000108d0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x108D0	11428 bytes
SHA-256: `ae7bdbb5b78ba14a8bdaa06b8db2cdf1fab72ad8b45bdb09485a15b037e337a0`
`font_02_sfnt_off00012f9c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12F9C	4324 bytes
SHA-256: `05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176`

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