PDF malware analysis — malicious · fb08c165b0f837e2

MALICIOUS

PDF

87.4 KB Created: 2021-05-03 23:29:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25

MD5: 6a177b26b7a2b6e4b2553426f4cb812e SHA-1: afc1accff8802479f688d76745ee72f2c6d780c9 SHA-256: fb08c165b0f837e230aa31e534218a5627a0b0f9d4e496c973e22ed79bfee9b7

186 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URIs pointing to disposable hosting sites, likely to distribute malware or phish users. The presence of external links suggests an attempt to redirect the user to malicious content, potentially via a spearphishing attachment delivery vector.

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://vilenefex.ru/strik?utm_term=nintendo+ds+lite+rechargeable+battery+pack+%2528usg-003%2529 PDF link annotation
- https://dodupezuvu.weebly.com/uploads/1/3/4/4/134443873/462471.pdfIn PDF document text
- https://rosolivemimej.weebly.com/uploads/1/3/1/3/131382018/6757274.pdfIn PDF document text
- https://ligapixoxos.weebly.com/uploads/1/3/4/3/134378271/sanoxobe_winew_javagigesov_sasuwap.pdfIn PDF document text
- http://pedrons.space/oracle_java_1.8_download_linuxw8ulu.pdfIn PDF document text
- https://zemutixo.weebly.com/uploads/1/3/4/8/134865820/tomisif_lufobunabumik.pdfIn PDF document text
- http://4gusevshop.space/landlords_tenancy_agreement_template_freee2ls8.pdfIn PDF document text
- http://shopbest.online/video_de_la_carcacha_selena_y_los_dinos81k2r.pdfIn PDF document text
- https://fujulisu.weebly.com/uploads/1/3/4/0/134042697/1075545.pdfIn PDF document text
- https://poxatekegevu.weebly.com/uploads/1/3/4/7/134753674/3223863.pdfIn PDF document text
- http://webdefilmizle.com/21838461320wn1jd.pdfIn PDF document text
- https://guzozexuvuro.weebly.com/uploads/1/3/4/3/134322735/8284628.pdfIn PDF document text
- https://rezezeveg.weebly.com/uploads/1/3/1/8/131871466/taromuwikid_legozamake.pdfIn PDF document text
- https://posodukur.weebly.com/uploads/1/3/4/3/134347560/9666711.pdfIn PDF document text
- https://fuwipinax.weebly.com/uploads/1/3/4/0/134016709/7270197.pdfIn PDF document text
- https://sesifubonimexa.weebly.com/uploads/1/3/5/3/135317238/9032607.pdfIn PDF document text
- http://copyright-infringement.business/timezee8flx.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/db4c9309-c3e6-4cc5-9244-8796913a7354/what_are_ticker_symbols_in_stocks.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/5df1deb0-2441-4ec4-a9e1-a629602c6bba/4391610326.pdfIn PDF document text
- https://uploads.strikinglycdn.com/files/eba54f57-2975-439c-9d29-ce46a2a963bc/zawewulobilejovol.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_off000107c9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x107C9	5984 bytes
SHA-256: `2d2af3b3dfa1aa5e408ca087b7ce984c99b4f4861ba6bcba003f64616d6afbdd`
`font_01_sfnt_off00011c32.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11C32	11024 bytes
SHA-256: `06781c61897c9f2854e608574701d2f19abd433824d09137226b2eeb4a5b8b0d`
`font_02_sfnt_off000141c1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x141C1	4324 bytes
SHA-256: `9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2`

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