Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd48bfd3d7380e00…

MALICIOUS

PDF

72.0 KB Created: 2021-04-06 15:06:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3ed77c13dd55a400c8ae5b2b6751230a SHA-1: 4511de578655adb2d3892379d5a6a9f9f5fe771f SHA-256: dd48bfd3d7380e006f5a37364dd105068e7dc23249bd7f098886144ce27678e1
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many pointing to disposable domains and disguised as downloadable documents. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and extensive link farm suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://bologen.ru/award?keyword=benim+hocam+t%25C3%25BCrk%25C3%25A7e+ders+notlar%25C4%25B1+pdf PDF link annotation
    • http://reduslim-italiaufficiale.site/35444672251eu40o.pdfIn PDF document text
    • https://dijajogid.weebly.com/uploads/1/3/0/8/130874349/ba2ce2.pdfIn PDF document text
    • http://daliadiago.com/basic_seismic_processingf0bye.pdfIn PDF document text
    • http://reduslim-italia.website/agribusiness_management_textbookfgapj.pdfIn PDF document text
    • http://detonicinitalia.website/nbde_part_1_questions_free_download7iart.pdfIn PDF document text
    • http://gdztut.com/artist_loft_floor_easel_instructions12vvh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468838/normal_6048323da780e.pdfIn PDF document text
    • http://xilabapuradom.iblogger.org/two_by_two_nicholas_sparks_movie.pdfIn PDF document text
    • https://cdn.sqhk.co/mopomotop/hbzha6H/the_happy_hocky_family_moves_to_the_country.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4406787/normal_5ffff83fdea22.pdfIn PDF document text
    • https://totovipuvo.weebly.com/uploads/1/3/2/7/132740708/papusado.pdfIn PDF document text
    • https://govobozof.weebly.com/uploads/1/3/5/3/135315692/a54694.pdfIn PDF document text
    • https://cdn.sqhk.co/dijabidasu/IjjlKja/13176274626.pdfIn PDF document text
    • https://fubupudixad.weebly.com/uploads/1/3/4/7/134742266/sexefamikiwuwuj-telilived-natonodidasu.pdfIn PDF document text
    • https://majabowuji.weebly.com/uploads/1/3/6/0/136092793/gazinimakuguxa.pdfIn PDF document text
    • https://ligofaxudatejot.weebly.com/uploads/1/3/0/7/130739538/sawaxawejuti.pdfIn PDF document text
    • https://rebumazezip.weebly.com/uploads/1/3/4/8/134860465/jodelajubinewew.pdfIn PDF document text
    • http://zegexurimaf.iblogger.org/how_to_download_final_cut_pro_for_free_2019.pdfIn PDF document text
    • https://xufiwelak.weebly.com/uploads/1/3/1/1/131164558/wutirufa.pdfIn PDF document text
    • https://cdn.sqhk.co/vofonowul/ighdjg6/17023221685.pdfIn PDF document text
    • https://cdn.sqhk.co/wedowetaso/crscZjf/38805167854.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fevenubonanez.rf.gd/latimitafixipi.pdfIn PDF document text
    • http://tutunod.epizy.com/vutixiwapefojajiwopogavid.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_off0000db25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB25 5844 bytes
SHA-256: 1adfaae2435ff360ac71a8473251969b43483a33aeff81d8bffc3bd46b400296
font_01_sfnt_off0000ee63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE63 10284 bytes
SHA-256: c545214a53aa25cc3bd68d2805e05de806c3ea57ad8cd96ade1471ab20a8805e

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