Malicious PDF — malware analysis report

Static analysis result for SHA-256 267d16a47de9d69d…

MALICIOUS

PDF

84.3 KB Created: 2021-03-07 17:42:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: a395f559fd853fb07f16595fa5636a2e SHA-1: e898839c5a74262b7ae16fb3aeabb3f8572ee04d SHA-256: 267d16a47de9d69ddfcb09157dd6dd1d74af31a49a1bb99c6df8600a1aad9b21
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 0.9998

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://baarspo.ru/strik?utm_term=dnd+5e+phantasmal+force+spell PDF link annotation
    • https://cdn.sqhk.co/raxuzuvuluf/cA5vPgz/vewobokisu.pdfIn PDF document text
    • http://klosheff.xyz/copernic_desktop_search_kostenlos_enp8zlv.pdfIn PDF document text
    • http://medway24.com/muruzodaduqzf.pdfIn PDF document text
    • http://puwonasomoso.22web.org/2936846002.pdfIn PDF document text
    • https://cdn.sqhk.co/pimupigedu/iihhgjY/72858919320.pdfIn PDF document text
    • http://semowatuk.iblogger.org/seth_teigen_salary.pdfIn PDF document text
    • https://cdn.sqhk.co/jekuvobu/fjdgjfQ/46133240577.pdfIn PDF document text
    • http://velixone.66ghz.com/medan_magnet_kelas_12.pdfIn PDF document text
    • https://cdn.sqhk.co/kawinojos/fvPqTja/bil_batori_picture.pdfIn PDF document text
    • http://kiladuwujufuzav.22web.org/nifuf.pdfIn PDF document text
    • https://cdn.sqhk.co/zunezafi/eefhgD9/15266823780.pdfIn PDF document text
    • http://slmit.fun/16293562997z2shj.pdfIn PDF document text
    • http://copyright-help-report.com/what_is_unlimited_power_plan_u_mobilefqwpk.pdfIn PDF document text
    • https://cdn.sqhk.co/gogamosujimi/YqZSJC8/25812361088.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kigiviga.rf.gd/72601718255.pdfIn PDF document text
    • http://kisepupiregeseb.rf.gd/open_office_free_windows_8._1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99b69704-7413-4162-8fae-2427f623edb0/lodofezofunibog.pdfIn PDF document text
    • http://lofoxos.epizy.com/android_google_analytics_example.pdfIn PDF document text
    • http://xokofenox.epizy.com/gokewopewili.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a099e1f-efb3-48ce-be9f-579cc5e79bdb/segn_according_to_fermn_qu_habra_pasado_si_hubieran_cerrado_la_puerta_con_llave_1_of_1.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_off0000ff7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7C 5516 bytes
SHA-256: c98afd3ad026f72bb1a08abd235c7ca1891e79c038060a4b55d1f00600cc115a
font_01_sfnt_off0001121b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1121B 16216 bytes
SHA-256: 33a1a29ff62bc0b0a0fdaa252a38f7ba9c0c3a86e8dafcab31988b4af230c30d

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