PDF malware analysis — malicious · 558f243cc3a3886a

MALICIOUS

PDF

79.7 KB Created: 2021-03-13 13:08:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26

MD5: 1ca618eb1e2188aa13b282fb9f4e1f35 SHA-1: 89cd80ec00387eeb1c30a74e5d3a70d1ba612b46 SHA-256: 558f243cc3a3886a772c6e53fee2752139ae535db97414d98135d5ae46da5d51

126 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. The document contains numerous embedded URLs, many pointing to disposable hosting or suspicious domains, suggesting it functions as a link farm or phishing lure. The presence of external URIs and the overall structure point towards an attempt to redirect users to malicious sites, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9995

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://zajinet.ru/award?keyword=ethnographic+definition+pdf PDF link annotation
- https://cdn.sqhk.co/vuwipabobatu/y6heggi/37549248198.pdfIn PDF document text
- http://dabokopi.22web.org/51282349227.pdfIn PDF document text
- https://cdn.sqhk.co/xudekutof/fgCjfoP/download_bottle_flip_3d_hack.pdfIn PDF document text
- http://choosenews.space/puzipixobusegenul9s9fr.pdfIn PDF document text
- https://cdn.sqhk.co/wugunifikezu/irridsG/fiwajedamelurosolofenivik.pdfIn PDF document text
- http://francobusiness.com/88685141947ww0ea.pdfIn PDF document text
- https://cdn.sqhk.co/pugepavofu/hNGgjdr/betomawixofafamarur.pdfIn PDF document text
- http://giwosoto.sportsontheweb.net/why_is_collective_security_difficult_to_achieve.pdfIn PDF document text
- http://dorightunion.com/618119125234dvhm.pdfIn PDF document text
- http://bezerojiw.scienceontheweb.net/tipos_de_actitudes.pdfIn PDF document text
- http://duplicwcnj.space/percy_jackson_sea_of_monsters_watch_movien96cb.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://sebuvikibafil.epizy.com/dilinesakademisada.pdfIn PDF document text
- http://jusibutotesax.epizy.com/97365248996.pdfIn PDF document text
- http://sujawokasafu.onlinewebshop.net/auditing_and_assurance_services_free_download.pdfIn PDF document text
- https://s3.amazonaws.com/vuxalirudidel/free_kindergarten_worksheets_writing_numbers.pdfIn PDF document text
- https://ddd59a73-be73-4575-bd7b-2e5900175f8b.filesusr.com/ugd/5dc0ef_7f1a144cbb204c5ab2d4fffba5aaf237.pdf?index=trueIn PDF document text
- https://ae8c1479-5121-4009-b0ed-8259dbb1205b.filesusr.com/ugd/0aff45_212e0531ba554ff78ea176d8b495c069.pdf?index=trueIn PDF document text
- http://vorisenunajix.myartsonline.com/samsung_galaxy_s5_mini_max_sd_card_size.pdfIn PDF document text
- https://9f9bd9fa-00fe-4673-b34e-9a629881f524.filesusr.com/ugd/09273f_3fdcef946de34902a1c219974c1575ef.pdf?index=trueIn PDF document text
- https://s3.amazonaws.com/jigezilor/chip_avira_android_kostenlos.pdfIn PDF document text
- http://xuvotawelotito.epizy.com/bangalore_university_provisional_degree_certificate_format.pdfIn PDF document text
- https://a3720f92-bdaa-4449-a3ff-14f36884d2d5.filesusr.com/ugd/afadc3_2d6760562aae4c0196c688b6566b9729.pdf?index=trueIn 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_off0000ee58.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEE58	4952 bytes
SHA-256: `dc21d4dc79e55dc547081de335c6f5d945cc99fe195aa70a3f15845e831e3251`
`font_01_sfnt_off0000ff20.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFF20	10572 bytes
SHA-256: `8ed8f2d68b1f68f90d29e6cec7f300c1020b6b200f0cab810bc85318d068fcfc`
`font_02_sfnt_off00012322.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12322	4324 bytes
SHA-256: `cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34`

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