Malicious PDF — malware analysis report

Static analysis result for SHA-256 82dc4e0be3f4db24…

MALICIOUS

PDF

73.8 KB Created: 2021-01-29 09:44:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: abc85647d04b2573dc1042096d688c41 SHA-1: 9ebe0ad40dabe8316c55a6423a0ac42cd5214dff SHA-256: 82dc4e0be3f4db24aa6150d316e7a2535d26182f92e68be1c325ec8c29c75b2f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The sample was flagged by ML classifiers and ClamAV as malicious. It contains numerous external URIs, including a link farm on disposable hosting, indicating a phishing or redirection attempt. The PDF's structure and embedded URLs suggest it is used to direct users to potentially harmful websites.

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://leonvi.ru/123?utm_term=evil+dead+hail+to+the+king+game PDF link annotation
    • http://liketime.fun/lesolegesapea39ha.pdfIn PDF document text
    • https://cdn.sqhk.co/riteximeras/jncXtza/rotten_tomatoes_netflix_series_ratings.pdfIn PDF document text
    • http://anarchymedya.com/super_power_fx_be_a_superhero_mod_apkeptr8.pdfIn PDF document text
    • https://cdn.sqhk.co/nagubeze/gbODHjj/strategic_management_partners_augusta_ga.pdfIn PDF document text
    • https://cdn.sqhk.co/luwibajik/j0ZgiUp/zezotixebesu.pdfIn PDF document text
    • https://cdn.sqhk.co/titabofasika/bKRvhgr/to_do_list_app_for_macbook.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424331/normal_6010d877d4ff7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/mejawiwomak/harmonize_song_magufuli.pdfIn PDF document text
    • http://jurolabadujo.rf.gd/az_corporation_commission_filing_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/setigafat/53811858742.pdfIn PDF document text
    • https://s3.amazonaws.com/labitajaxatufib/fukovajukogenupet.pdfIn PDF document text
    • http://dojagosixotebut.rf.gd/difabipazupamax.pdfIn PDF document text
    • http://kinapemib.rf.gd/beautiful_pics_wallpaper_free.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e55f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE55F 5048 bytes
SHA-256: 6e2c6e7df53aa9df58b6fd3a820307df80532aefa8193413dd5df1bec57f25e4
font_01_sfnt_off0000f66f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF66F 10500 bytes
SHA-256: dcd24ea597fdf0aa65aad5076cad336f5e3b4716e6176414ee0348ff8a870d0d

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