Malicious PDF — malware analysis report

Static analysis result for SHA-256 c410cc527ce3a531…

MALICIOUS

PDF

78.4 KB Created: 2021-04-27 14:09:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c72b9032fd3a711f50d329d675ccc41e SHA-1: e935de371db0e575d1766ad5d71d8fcd8e654279 SHA-256: c410cc527ce3a5317db71eb0957efb3f4d5ec845b3328bb4a3550a2b1f92cec5
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://baarspo.ru/strik?utm_term=how+to+replace+insinkerator+disposal PDF link annotation
    • http://invitesistem.ru/2003_jeep_liberty_sport_tire_sizeyvo96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371543/normal_6069f6e243d71.pdfIn PDF document text
    • http://bnl-jobs.com/5722452546364zii.pdfIn PDF document text
    • http://debasowajedo.22web.org/any_nail_salons_open_on_sundays_near_me.pdfIn PDF document text
    • http://copyrightreports.com/padobuwujobimafinamigobp772i.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370074/normal_600c73501e767.pdfIn PDF document text
    • http://sejapamuji.22web.org/safety_management_system_training.pdfIn PDF document text
    • http://silewugebed.scienceontheweb.net/what_are_the_phrasal_verbs_in_english.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457311/normal_604b95d47a847.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/tomus.pdfIn PDF document text
    • http://zesenadozefut.sportsontheweb.net/sogemexelusevuxid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gofirog.epizy.com/chakravyuh_movie_300mb.pdfIn PDF document text
    • https://s3.amazonaws.com/lusabifef/vijebexedanonesa.pdfIn PDF document text
    • http://xojudemavu.onlinewebshop.net/leon_gordis_epidemiologia.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/2020_toyota_camry_xse_v4_horsepower.pdfIn PDF document text
    • https://ad858f6a-7bbb-416d-9365-e04d7986ed9b.filesusr.com/ugd/3c9ac1_4a053859fe2341a6b68e3f8639364c6e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dosipive/egyptian_girl_guide_uniform.pdfIn PDF document text
    • http://rinafuladimuk.epizy.com/amadis_de_gaula_gratis.pdfIn PDF document text
    • http://wajiletum.epizy.com/29552638091.pdfIn PDF document text
    • https://e691ad07-92dc-45fa-af10-8929b4045ede.filesusr.com/ugd/87b9a8_14f3c37aa3aa46e09441dba7d045209d.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2D9 5184 bytes
SHA-256: 7f26ef53276fe61c96877dc0b7d302782a1062d4dadef958a5fcef139b346043
font_01_sfnt_off00010494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10494 11196 bytes
SHA-256: fa2820df02357414fec5177a591cca2f5fedb2e32407ac66ba6feb461cc74278

Open this report in the interactive analyzer, or submit your own file for analysis.