Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3bd5a2dbe5716c…

MALICIOUS

PDF

80.6 KB Created: 2021-04-07 05:31:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 1b49f9a396e03ba75194578248f5b8e3 SHA-1: 964f0e8e73bb4628f2efce48d266c094604bbb35 SHA-256: 0e3bd5a2dbe5716ccc394d61dd1e6b18a55a4c9da89606b003f6a000a10200c4
186 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9997

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://fokemale.ru/123?utm_term=podremos+vivir+juntos+alain+touraine+pdf PDF link annotation
    • https://jubekufolofifi.weebly.com/uploads/1/3/4/5/134593927/rusolinusizabijujo.pdfIn PDF document text
    • https://kidubaviputotej.weebly.com/uploads/1/3/4/5/134520398/183c7957a5c.pdfIn PDF document text
    • https://buwulikifem.weebly.com/uploads/1/3/4/5/134583505/fawenavorunujizugis.pdfIn PDF document text
    • https://cdn.sqhk.co/madozozafi/3qvgjih/35535637865.pdfIn PDF document text
    • https://bafuvigugasud.weebly.com/uploads/1/3/5/3/135308410/9249649.pdfIn PDF document text
    • https://cdn.sqhk.co/lufelumad/ide29wk/marshmello_fortnite_skin.pdfIn PDF document text
    • https://cdn.sqhk.co/nawamuzimosu/QyZm8ig/gourmet_race_sheet_music_violin.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418178/normal_605977ec7a33a.pdfIn PDF document text
    • https://jowidirususonin.weebly.com/uploads/1/3/0/7/130775515/medifixoxug.pdfIn PDF document text
    • http://zirosax.iblogger.org/hotel_guest_registration_form_template_word.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452845/normal_60384d11d6d46.pdfIn PDF document text
    • https://cdn.sqhk.co/wesaduleb/hjdyjb0/juripilim.pdfIn PDF document text
    • http://gemajesubon.22web.org/oral_surgery_armamentarium.pdfIn PDF document text
    • https://zodekunomaxuj.weebly.com/uploads/1/3/0/7/130739112/xilufijowu.pdfIn PDF document text
    • https://cdn.sqhk.co/xuwifoviwalo/ggidzhb/molovuposadosep.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kifasonow.rf.gd/carpal_tunnel_nerve_glides.pdfIn PDF document text
    • http://rotitow.rf.gd/88687808781.pdfIn PDF document text
    • http://wijudog.epizy.com/45449028803.pdfIn PDF document text
    • http://vavilonogamet.epizy.com/how_to_flip_the_camera_in_a_video.pdfIn PDF document text
    • http://nebokidib.epizy.com/25350695968.pdfIn PDF document text
    • http://lesiterifok.epizy.com/40890591291.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_off0000fa6b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6B 5324 bytes
SHA-256: 294eca60d3451577b3f4c6bfd7680b47707848f496a1da837c8613e81f071063
font_01_sfnt_off00010c7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7A 12008 bytes
SHA-256: 70f7ccd6ea056c3e1f72d32dd26e5d620af5578ea8a4831de3084b70ffa03e21

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