Malicious PDF — malware analysis report

Static analysis result for SHA-256 63faa88f5ac3919a…

MALICIOUS

PDF

81.9 KB Created: 2021-03-15 12:36:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: f156e049797b7c09e401ecd0b3ec18ae SHA-1: 0f2e35898e249c334fbb97dfdccd69bea5c9567f SHA-256: 63faa88f5ac3919ab26ac04c28169e50c31bff37521887d42c59cb2fab25c23e
186 Risk Score

Malware Insights

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

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 0.9961

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=letters+from+santa+template+uk PDF link annotation
    • https://kafunonedejo.weebly.com/uploads/1/3/4/6/134662894/rasotovuge.pdfIn PDF document text
    • https://cdn.sqhk.co/pefevepufi/hjZhegg/wallpaper_4k_hd_download_for_android_mobile.pdfIn PDF document text
    • http://consumer-data-protection-bureau.com/lorutipajidiwixuninuk0moa.pdfIn PDF document text
    • https://cdn.sqhk.co/bupewazadufa/hhhdugc/wigivulinubije.pdfIn PDF document text
    • https://pojamemurix.weebly.com/uploads/1/3/1/4/131408024/de9a9b.pdfIn PDF document text
    • http://italiabeach.space/christmas_tree_color_by_number_coloring_pagessszo3.pdfIn PDF document text
    • http://themarkuzmusic.com/51320336064icnjf.pdfIn PDF document text
    • https://felipivi.weebly.com/uploads/1/3/1/8/131856333/gixutage_lizoziwebabu_bizegefifivelu.pdfIn PDF document text
    • https://gufobetatogeset.weebly.com/uploads/1/3/1/0/131069923/75b55d0.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/fhjMSid/fepasixuwubupejotadijaji.pdfIn PDF document text
    • http://usacreditreport.info/will_shatter_me_become_a_movieb81ae.pdfIn PDF document text
    • https://mepodatadun.weebly.com/uploads/1/3/1/4/131452799/e51a15d301d2d.pdfIn PDF document text
    • https://pefuxagofir.weebly.com/uploads/1/3/4/3/134359429/sakepasosilobuz.pdfIn PDF document text
    • https://lagukowimewalis.weebly.com/uploads/1/3/5/3/135335318/xopazupojum.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368964/normal_601c6a6bebdbe.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376598/normal_5ffe4f2764ce7.pdfIn PDF document text
    • http://nikecortez.net/93444408046qckag.pdfIn PDF document text
    • https://firulozide.weebly.com/uploads/1/3/0/7/130775295/5299775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451377/normal_600cf64c0ddd9.pdfIn PDF document text
    • https://gisunada.weebly.com/uploads/1/3/1/4/131409009/pirokuxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409103/normal_5fe8ef6b6498d.pdfIn PDF document text
    • https://cdn.sqhk.co/janurisu/gguhdt1/ganudoxemamomiwuzajaveta.pdfIn PDF document text
    • https://zuvagojajom.weebly.com/uploads/1/3/5/3/135398962/fopijado.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/panokojol/best_shooter_games_2018_android.pdfIn PDF document text
    • https://s3.amazonaws.com/fidefofudi/68120562751.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/android_studio_gradle_3._3_sync_failed.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_off00010044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10044 5052 bytes
SHA-256: 4e7044a9622dfafff560e2744f74f572b5a4a0dc5673d1e6abb1085971315393
font_01_sfnt_off0001115f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1115F 11308 bytes
SHA-256: afb23b1121495dfe34bf491c1ebac9dd9552a352b606a40767e37d8deef9dfee