Malicious PDF — malware analysis report

Static analysis result for SHA-256 3548275eb656bc8b…

MALICIOUS

PDF

83.1 KB Created: 2021-03-02 22:19:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 0bad9c710fa67260f8fe42560d5b9d9b SHA-1: d471f7a2a1aff764a27f5bedc73db4e579fa8802 SHA-256: 3548275eb656bc8b175b8beda9d5d4f59e9b9742e5d72c1d555258e3dcff2533
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the presence of embedded URLs points towards an attack pattern focused on redirecting users to potentially harmful external sites.

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://seumenha.ru/award?keyword=percy+jackson+titan%2527s+curse+movie+watch+online PDF link annotation
    • http://rivepozepuxar.mywebcommunity.org/how_to_edit_my_writing.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/jelapisekomiferoxeger.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367302/normal_600dfcf7440e7.pdfIn PDF document text
    • http://tixesikixux.mygamesonline.org/mean_from_a_frequency_table_exam_questions.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/1._what_is_the_general_data_protection_regulation_2018.pdfIn PDF document text
    • http://delalikifavaru.iblogger.org/69307277471.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498893/normal_5fd913cb5ceb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459780/normal_600fe34acb517.pdfIn PDF document text
    • http://lnstagram-helping-centre.com/bootstrap_basic_template_free2xj6s.pdfIn PDF document text
    • http://podipotekoi.ru/control_systems_inc_buford_ga3yivq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366031/normal_5ff44982c5afb.pdfIn PDF document text
    • http://sanatoriy-izumrudny.ru/397792555226wgoz.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/72066450490.pdfIn PDF document text
    • http://siwosupegejolop.medianewsonline.com/kiwarego.pdfIn PDF document text
    • http://finuxezanasa.mygamesonline.org/fedemazawur.pdfIn PDF document text
    • http://nopotaz.medianewsonline.com/badexedarofizasewifaf.pdfIn PDF document text
    • http://lazategomid.scienceontheweb.net/how_to_check_epson_ink_level.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sexikiti.epizy.com/motu_patlu_cartoon_song.pdfIn PDF document text
    • http://kavejanunar.epizy.com/9529662646.pdfIn PDF document text
    • http://gowojurepola.epizy.com/google_spreadsheet_calendar_2018_template.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_off0000f1d8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1D8 5468 bytes
SHA-256: 1da159e9734df555cc875d169c27be36dc9bf447a5caa8bd352b5be13e7656e8
font_01_sfnt_off0001046b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046B 19548 bytes
SHA-256: 0e40282686ae847d6563d407f01c8fe9906bee4d484972732b38249e07a8af16

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