Malicious PDF — malware analysis report

Static analysis result for SHA-256 9da2c6d36974a071…

MALICIOUS

PDF

81.0 KB Created: 2021-03-10 12:24:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fa7890eb366adddaa68f23d05a1d0eb7 SHA-1: 5faf4b5a2bf77fdfe293f62abfa3ce296be15333 SHA-256: 9da2c6d36974a07121b12aac17896ef3d0d0f5c085be3fdfd2ed0ee0dd48d57c
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing malware or conducting phishing attacks. The presence of external URIs and the nature of the URLs suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://mezovuduw.ru/123?utm_term=abbyy+screenshot+reader+portable++full PDF link annotation
    • http://dojemop.mywebcommunity.org/boska_komedia.pdfIn PDF document text
    • http://xolokukifimiv.sportsontheweb.net/iit_foundation_maths_books_for_class_8_free_download.pdfIn PDF document text
    • https://vakogupomuniv.weebly.com/uploads/1/3/4/6/134610568/sadekelel.pdfIn PDF document text
    • http://rumurel.mywebcommunity.org/saxosivozup.pdfIn PDF document text
    • http://worabipupe.mypressonline.com/virtual_lab_the_cell_cycle_and_cancer_worksheet_quizlet.pdfIn PDF document text
    • http://avtoshtorki.shop/396952643050bcub.pdfIn PDF document text
    • http://makebugobiwuka.mypressonline.com/how_to_use_krups_espresso_machine_xp3208.pdfIn PDF document text
    • http://zebisol.mypressonline.com/how_to_set_timer_on_delonghi_dragon_heater.pdfIn PDF document text
    • http://brandframeb.com/chamma_chamma_new_song_video_tinyjukepu0nq.pdfIn PDF document text
    • https://levalezekavazif.weebly.com/uploads/1/3/4/6/134639406/xilegajadapaxurisume.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478378/normal_603f19fc11a4d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490256/normal_60129b4e87229.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387036/normal_601fcc751169b.pdfIn PDF document text
    • http://chempion.coffee/do_car_seat_bases_expire_chicco84qx3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489255/normal_603bdb4acb12c.pdfIn PDF document text
    • https://malitizume.weebly.com/uploads/1/3/4/0/134097131/mipilelumoso_ruxaturosulemir.pdfIn PDF document text
    • https://patosalar.weebly.com/uploads/1/3/1/3/131384166/wabazoso_miwoxejisos_puwekan_kazenulaw.pdfIn PDF document text
    • http://tuwasukam.getenjoyment.net/what_does_bmw_service_engine_soon_light_mean.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tavoxelelenasi.onlinewebshop.net/78399886965.pdfIn PDF document text
    • http://miganuvag.myartsonline.com/how_old_is_hermione_in_sorcerers_stone.pdfIn PDF document text
    • http://zejusamipokera.myartsonline.com/auto_mechanics_fundamentals.pdfIn PDF document text
    • http://xenexafa.myartsonline.com/lakitapaxinezed.pdfIn PDF document text
    • http://xipanizi.myartsonline.com/aging_as_a_social_process_canadian_perspectives_7th_edition.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_off0000fefe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFE 5472 bytes
SHA-256: a000668c9a948cac620f5e1962b760997303b9bb0054184126698de450c396a4
font_01_sfnt_off0001119c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1119C 10836 bytes
SHA-256: 72049829be3e9e9f68e7b3e0bece5b59eda992af536c292e0729199380d6b6b4

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