PDF malware analysis — malicious · 88db7aef64dc9394

MALICIOUS

PDF

80.1 KB Created: 2021-03-20 04:40:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20

MD5: f793bc57339e1079b3305f664bf7bea8 SHA-1: cc769177249340f1b745f9f014da2cf5dd3918d1 SHA-256: 88db7aef64dc939423662930364b1ea11fa5efdbc0b8ec748365ed259a05ef23

126 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The document contains numerous embedded URLs, including suspicious domains like zajinet.ru and gixipures.sportsontheweb.net, suggesting a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of malicious intent, likely to redirect users to harmful sites.

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/wix?keyword=nuclear+chemistry+answers PDF link annotation
- http://gixipures.sportsontheweb.net/great_resonant_weapon.pdfIn PDF document text
- http://sopugepibimel.mypressonline.com/62493494029.pdfIn PDF document text
- http://zupurowuzuxule.iblogger.org/i_am_a_fun_guy_t_shirt.pdfIn PDF document text
- https://cdn.sqhk.co/bisuligiga/c4zJhfE/3339808471.pdfIn PDF document text
- http://tatanip.medianewsonline.com/simple_html_and_css_templates_free_download.pdfIn PDF document text
- http://fimewovoko.getenjoyment.net/psychology_objective_questions.pdfIn PDF document text
- http://kadesevi.iblogger.org/zixekuposin.pdfIn PDF document text
- https://cdn.sqhk.co/fowurona/iavoNib/cold_war_black_ops_campaign.pdfIn PDF document text
- http://nufivuzelikonax.getenjoyment.net/meade_lx200_telescope_review.pdfIn PDF document text
- https://cdn.sqhk.co/turanexode/ejifY7J/washington_post_app_windows_10.pdfIn PDF document text
- https://cdn.sqhk.co/xapawavuma/c42Tias/wheel_scale_mod_apk_download.pdfIn PDF document text
- http://rafupofamurawaf.mygamesonline.org/childrens_short_stories_about_gratitude.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://17851959-1482-4b49-8222-7b7b0c628459.filesusr.com/ugd/3cb679_e410f3dc58d449d386c21436a578ca4b.pdf?index=trueIn PDF document text
- http://wemaxoseni.myartsonline.com/vuzukowufopazolosega.pdfIn PDF document text
- https://7f3356c1-ec1f-498a-9d41-5b36c14d87b7.filesusr.com/ugd/98d33d_74ae236484074aa3a403ed7a0ba3b719.pdf?index=trueIn PDF document text
- http://jupimiko.epizy.com/juzazidozuzowofopovevovan.pdfIn PDF document text
- https://69a7f268-727d-4112-ba4f-a3538cc856be.filesusr.com/ugd/9a0d60_e68b11106c46449f9ed82400502fd54b.pdf?index=trueIn PDF document text
- http://bageradafasuk.rf.gd/gajowutudavonogel.pdfIn PDF document text
- https://e5720c39-3c1c-4a52-9be9-509675281b5a.filesusr.com/ugd/0010c8_6f1c136438bf4e128fe55e6cb444cd69.pdf?index=trueIn PDF document text
- http://sawokinajiralar.rf.gd/exclusive_buyer_agency_agreement.pdfIn PDF document text
- http://zifofupox.rf.gd/zujibikujozapul.pdfIn PDF document text
- http://zenakezogutomu.onlinewebshop.net/aha_take_on_me_piano.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 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e5a3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE5A3	5200 bytes
SHA-256: `f77651ca6b23e72b2731c078e9dec0a4914fa3affde693ad6104a03c88299147`
`font_01_sfnt_off0000f742.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF742	11252 bytes
SHA-256: `2d71a3514417c2add3390a6fa4228ae4060aeb8e251aaa6a5fc8b62c357e8d0a`
`font_02_sfnt_off00011e1e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11E1E	16080 bytes
SHA-256: `014fdb7076ebfc326e48e50914f0077be73d9a972b327c9fef30e9d59f054234`

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