Malicious PDF — malware analysis report

Static analysis result for SHA-256 3020fe3b67b53085…

MALICIOUS

PDF

81.1 KB Created: 2021-05-21 15:24:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0235301172ef7e3d68f3bf0ef452ab8c SHA-1: 8dfe22006b3b3a67f8023581d9831b3f999a36ad SHA-256: 3020fe3b67b53085550810ba3485865f03dc39e7abc481e235724c6dc8905ab4
156 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 0.9954

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 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.
  • 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://druttle.ru/strik?utm_term=cu%25C3%25A1l+es+la+diferencia+entre+la+educaci%25C3%25B3n+f%25C3%25ADsica+el+deporte+y+la+recreaci%25C3%25B3n PDF link annotation
    • https://vurikiwuguwek.weebly.com/uploads/1/3/1/4/131408439/1689105.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385620/normal_604644449cc83.pdfIn PDF document text
    • https://xelavizagak.weebly.com/uploads/1/3/5/3/135325118/ee32d99050.pdfIn PDF document text
    • https://darizifipofoluw.weebly.com/uploads/1/3/2/8/132815181/lugapewa_vokunuzodosopu.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4480750/normal_5fc88fabc1dcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390385/normal_6027c4622c9bb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376101/normal_6045e31e7dcba.pdfIn PDF document text
    • https://nedidibizexoba.weebly.com/uploads/1/3/0/9/130969065/lomajuxokugafi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415309/normal_6000344770a6e.pdfIn PDF document text
    • https://kavosimodo.weebly.com/uploads/1/3/4/9/134901779/2fea6ac.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/lofese/nagolizokuzonuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf9c44c9-b055-41f5-a695-e5fa871b066d/long_range_baofeng.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48f507c5-6cac-4231-b11c-6b7016c89bcb/premiere_pro_effects_tab_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/760e90b9-5620-4d7d-9b40-c35efcc744c1/toyota_camry_se_2018_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/936ad754-db7c-47b4-8f86-9451de1f9605/49079092299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5979af26-a0c5-4115-b57c-8766da47308c/vowejomurusaxozupusidod.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d095e891-de73-424f-9723-9d49f0f72e5c/49680270440.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/adobe_audition_free_cs6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/59283469-0446-40a7-a35e-62ef094d9666/how_do_i_reset_my_schlage_door_code.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/629496ea-fd20-41b7-b638-73d442f6efc7/xozitadebemukudego.pdfIn PDF document text
    • https://s3.amazonaws.com/nafibanefexex/50090667998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dafb820-13ae-4111-b0ac-dd031aacf82d/88253730877.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d1c7571a-5d4f-480e-8fd6-853951762e68/gutazadekipidan.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/xititifowoxawozubanetilu.pdfIn PDF document text
    • https://s3.amazonaws.com/wuzalugiseto/chess_for_android_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/tuxenipup/woxaregefew.pdfIn PDF document text
    • https://s3.amazonaws.com/jusagi/advanced_normalization_tools_matlab.pdfIn PDF document text
    • https://s3.amazonaws.com/fajixe/xokakujokefedamiti.pdfIn PDF document text
    • https://s3.amazonaws.com/jamuluvuvava/45518049166.pdfIn PDF document text
    • https://s3.amazonaws.com/tosego/normal_cbc_test_report.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_off0000fbca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBCA 5580 bytes
SHA-256: 5a3e55481aa1b53f53916c1a6bd87463c64a17bd51b3c704bcc3d673ea8c8ee1
font_01_sfnt_off00010e02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E02 11168 bytes
SHA-256: a4ec8b7a37c537605fa38165b1b1f5ac89ceac663ebd56783f93908da5084666

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