Malicious PDF — malware analysis report

Static analysis result for SHA-256 f060954b723721fd…

MALICIOUS

PDF

71.0 KB Created: 2021-02-23 00:46:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: dfd713b4dd52839c3276dfe28f321c91 SHA-1: d47c42b883335da1a7f17accf6910ff58b91075c SHA-256: f060954b723721fd987587969bafba6f3e35062402bb36ca0e3f2c59e82bd199
126 Risk Score

Malware Insights

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

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, with one specifically pointing to 'druttle.ru', suggesting a phishing or malware distribution attempt. The presence of PDF-specific heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports the classification as a malicious document designed to redirect users to external, potentially harmful, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=advanced+engine+performance+diagnosis+7th+edition+pdf PDF link annotation
    • http://wacc-cat.org/47055155220i20lt.pdfIn PDF document text
    • http://dawavuwera.22web.org/rubegezifujisab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501229/normal_5ff026fd44b54.pdfIn PDF document text
    • http://euroshopmn.space/sogajiruwezitud491nr.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460950/normal_5fe6d13f6c133.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387932/normal_600b7980dd0d3.pdfIn PDF document text
    • http://nebibila.iblogger.org/crock-pot_4.7l_hinged_lid_digital_slow_cooker_-_black_instructions.pdfIn PDF document text
    • http://begavarig.22web.org/15245538991.pdfIn PDF document text
    • http://sumomubidisuwo.iblogger.org/jonewamag.pdfIn PDF document text
    • http://edevletorg.com/247620231427sce.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478438/normal_5fedfad39bb94.pdfIn PDF document text
    • http://mmmmmme.space/tambourine_man_lyrics_bob_dylanq4y8m.pdfIn PDF document text
    • http://jakuzilikigo.iblogger.org/malayalam_album_song_ringtone_free.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/befafuni/how_to_root_samsung_galaxy_s5_active.pdfIn PDF document text
    • http://vewesefidovif.epizy.com/lapisarajelebuxodamizu.pdfIn PDF document text
    • https://s3.amazonaws.com/wutisigila/velejonugubofigomorotesa.pdfIn PDF document text
    • http://nuxumejaxumem.epizy.com/28089970166.pdfIn PDF document text
    • https://s3.amazonaws.com/zonivezada/financial_accounting_and_reporting_1_valix.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/impexmetal_sa_annual_report.pdfIn PDF document text
    • http://bikutuvuxaxixo.epizy.com/dawunajovuxenodunawoxofa.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC989 5456 bytes
SHA-256: e4f0fde1a1236dded584697c35f5fedc81d867902e36545348e11906f8dd6b70
font_01_sfnt_off0000dbf8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF8 10604 bytes
SHA-256: d17127e0d859abae9c14face81d447cbf91375d91c54cabdac2af8599f61c13f
font_02_sfnt_off0001003b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1003B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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