Malicious PDF — malware analysis report

Static analysis result for SHA-256 0dd08f9786bdb7b4…

MALICIOUS

PDF

75.3 KB Created: 2021-03-02 08:16:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 09d2fd53144a521ffc280fb3d29e2942 SHA-1: 70364f67632b8d8fce36e7889ddda860d2b54b16 SHA-256: 0dd08f9786bdb7b4dc01aa77070beea4c7c2cd0c5423c5bc39c1a76a2b988626
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by heuristics as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with malicious document lures.

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://vilenefex.ru/wix?keyword=against+moderate+gun+control PDF link annotation
    • http://idealslimitaly-ufficiale.site/davesetx0b6.pdfIn PDF document text
    • http://beviluxenumiliv.mywebcommunity.org/how_do_you_use_sea_bond_denture_adhesive_seals.pdfIn PDF document text
    • http://tublitalia.space/best_offline_dictionary_apkyc5gz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387567/normal_603b29cec70d3.pdfIn PDF document text
    • http://usesucre.pro/cell_phone_ringing_sound_effectle7rp.pdfIn PDF document text
    • https://namazowofurap.weebly.com/uploads/1/3/4/3/134372349/a6d69f547.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405179/normal_5ff87ead8e697.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/atlantic_fleet_free_download_pc.pdfIn PDF document text
    • http://nigoguno.scienceontheweb.net/who_is_gretel_in_the_boy_in_the_striped_pajamas.pdfIn PDF document text
    • https://webeboxux.weebly.com/uploads/1/3/4/4/134493090/zezenukoradi.pdfIn PDF document text
    • https://kerawidirara.weebly.com/uploads/1/3/4/7/134746453/0abb082cb.pdfIn PDF document text
    • http://filfex.ru/what_is_tantric_energypng3v.pdfIn PDF document text
    • http://daddytestit.xyz/how_to_connect_hp_deskjet_2545_wireless588wj.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370791/normal_5ff50bfaa922d.pdfIn PDF document text
    • https://zabugejagovim.weebly.com/uploads/1/3/1/6/131637755/c909393.pdfIn PDF document text
    • https://xevumijujivo.weebly.com/uploads/1/3/1/3/131383583/45d1c.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/lovomijelun/bitefunenekudo.pdfIn PDF document text
    • https://s3.amazonaws.com/meludav/aha_blood_pressure_measurement_guidelines_2017.pdfIn PDF document text
    • http://wowutuzineko.myartsonline.com/change_12_m2_into_cm2.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/sample_format_of_balance_of_payment_account.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_off0000e92c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE92C 5248 bytes
SHA-256: 4a90c0b0cf5220441676e04aff7060f8c738ac185a910f4bf76dd56395b825cf
font_01_sfnt_off0000faec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEC 10824 bytes
SHA-256: c3a31dd171f52b00fec399661d9ab6837cc0f41a25c0e4c127c3d8b02f16b4c4

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