Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d2cea922b83b420…

MALICIOUS

PDF

78.5 KB Created: 2021-03-19 19:12:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: ca89e4c18cf89f5222e3825263251881 SHA-1: 13a8716730009c740fb427882b591017d0e507b2 SHA-256: 4d2cea922b83b420934b4015ff5dfd1aae2ad606a0678cc003e28abdb58f8adf
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://kuzutuzo.ru/wix?keyword=2005+suzuki+eiger+400+4x4+owners+manual PDF link annotation
    • http://craftsmansmetics.com/33679739441edtgt.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4466140/normal_600afad08fba8.pdfIn PDF document text
    • http://tehnopolis.org/8856810025117dhk.pdfIn PDF document text
    • http://jarisudowapebi.sportsontheweb.net/greenhouse_effect_project_in_english.pdfIn PDF document text
    • http://iuts.space/how_to_root_samsung_galaxy_tab_4_sm-t231_using_odin8zl7g.pdfIn PDF document text
    • http://teren.fun/when_does_dork_diaries_book_14_come_outt4nod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428052/normal_604ceb84e2069.pdfIn PDF document text
    • http://jawunefuda.mygamesonline.org/neruwiweramunal.pdfIn PDF document text
    • http://retys.fun/gudik0ytz4.pdfIn PDF document text
    • http://spindlndou.space/35390126691990hh.pdfIn PDF document text
    • http://table-wait.com/birefubuwixetowidd7cf7.pdfIn PDF document text
    • http://linodogeb.scienceontheweb.net/nezilepuxurexozipokun.pdfIn PDF document text
    • http://xilexevu.scienceontheweb.net/45528347575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472495/normal_60399a0f59b18.pdfIn PDF document text
    • http://kakolamilasaru.medianewsonline.com/minn_kota_trolling_motor_plug_and_receptacle_24v.pdfIn PDF document text
    • http://tufuwavaziga.mygamesonline.org/66398287763.pdfIn PDF document text
    • http://fakexexu.sportsontheweb.net/77471944749.pdfIn PDF document text
    • http://nikaold.site/507536795097v770.pdfIn PDF document text
    • http://worldthailand.fun/14020514999the2w.pdfIn PDF document text
    • http://ver-alex.website/wozuwuzixutugenofisasoxa5cy10.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wobadumiravolu.atwebpages.com/barcode417_font_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0446e616-053d-4c20-a8c5-11bae1eb0f91/zojifuvazutabenevato.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b938bc85-5888-4018-ac94-b3260db7ae6e/what_is_the_plot_of_game_of_thrones.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0a47594-de9d-4b4e-8c99-65bc90d1e4ba/48930137505.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_off0000f3e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E5 5668 bytes
SHA-256: d92b8e422211240214e35a3b995671d55ab93c953afdb0f0b5c4c5803bcc06f9
font_01_sfnt_off00010747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10747 10828 bytes
SHA-256: 57b2a12b5cd05b973b6ec339c917a433fa98ee6865a6086516e5558a6914fcb0

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