Malicious PDF — malware analysis report

Static analysis result for SHA-256 8942647a45ce56d5…

MALICIOUS

PDF

82.7 KB Created: 2021-03-23 20:53:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d1b147d3c36a5ec460546fc818ecbbba SHA-1: 15477025dc6aa16b7d5355b6d88ea7c25ab8df60 SHA-256: 8942647a45ce56d53722f00bc401055c67773612a82b6094d3fad66085a6909d
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 0.9996

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://pelibifir.ru/strik?utm_term=at%2526t+cordless+phone+answering+machine+not+working PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4407994/normal_602575a49bd2b.pdfIn PDF document text
    • http://vituloza.sportsontheweb.net/xiwuletujopexapaxudojis.pdfIn PDF document text
    • https://nesajejegumexe.weebly.com/uploads/1/3/0/7/130776687/2a6c22493.pdfIn PDF document text
    • http://wivevemeb.scienceontheweb.net/saptashati_path.pdfIn PDF document text
    • https://morutasatosode.weebly.com/uploads/1/3/4/3/134366393/1666788.pdfIn PDF document text
    • http://zezasarasojid.mywebcommunity.org/all_the_kings_horses_line_dance.pdfIn PDF document text
    • https://fawurefo.weebly.com/uploads/1/3/4/4/134441885/bukovorakeja.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450419/normal_604d94039cda7.pdfIn PDF document text
    • http://zatorigixoluji.iblogger.org/minecraft_pe_free_chromebook.pdfIn PDF document text
    • http://jekeluxuto.mywebcommunity.org/65160822517.pdfIn PDF document text
    • http://nuvuxek.iblogger.org/grossman_s_cardiac_catheterization_angiography_and_intervention_free_download.pdfIn PDF document text
    • http://zazorin.scienceontheweb.net/anemia_ferropenica_diagnostico.pdfIn PDF document text
    • https://xizulorojude.weebly.com/uploads/1/3/5/3/135391297/8e0b2449d640651.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444882/normal_6045fd5f4451d.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bawilifugoxak.epizy.com/835731432.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/mojizefakokut.pdfIn PDF document text
    • http://mabivumida.rf.gd/remove_the_veil_in_the_bible.pdfIn PDF document text
    • https://s3.amazonaws.com/dazuxujepov/how_much_does_a_first_class_international_stamp_cost.pdfIn PDF document text
    • http://vuxonisozezuxov.rf.gd/avaya_one_x_agent_error_in_startup_root_element_is_missing.pdfIn PDF document text
    • http://mojogoralil.onlinewebshop.net/74414710341.pdfIn PDF document text
    • https://s3.amazonaws.com/tufujifinobiro/what_generation_is_the_newest_kindle_fire_10.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2D7 4144 bytes
SHA-256: 2e53d0f6fcd1b7433af5566efc5d8d38a976c2049471fd5a6cc656efdbb6683c
font_01_sfnt_off0000f0fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FA 25420 bytes
SHA-256: 1cd2052e32a0b83f07991db6d2c7f97dfe5df4dba1d3ba6e8557a6887bddbd9c
font_02_sfnt_off000126c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C7 16296 bytes
SHA-256: 5663d8578250f824917609d3eb76e3efe1318610afd7b77be9e2258255c4b957

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