Malicious PDF — malware analysis report

Static analysis result for SHA-256 db0c4ca78ca3a1de…

MALICIOUS

PDF

75.7 KB Created: 2021-06-10 03:28:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 6c72b5517c41b7df7d7e765c90e12487 SHA-1: 53d89318a682e99dcf965fae34439d69a5d10b52 SHA-256: db0c4ca78ca3a1de44945b1dcc4cdc353db6374a48956922a385afa2b02e3bc5
126 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one pointing to 'garglob.ru', a domain associated with malicious activity. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is designed to host many links, likely to deceive users into clicking through to malicious sites.

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://garglob.ru/pbw?utm_term=new+all+song+djpunjab PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4481397/normal_6009b8b2d76aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404490/normal_602bf937a6192.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371266/normal_5ff48cd378980.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376354/normal_60584c61eae2d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384159/normal_60333e15804b1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453142/normal_60509c09419fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410985/normal_605110915d5d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469631/normal_6040a45b5c8e9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb669794-530e-4455-82e8-3b686fed50a9/which_is_the_best_foodsaver_to_buy.pdfIn PDF document text
    • http://pibadaro.pbworks.com/f/abnormal_psychology_clinical_perspectives_on_psychological_disorders_9th_edition_free.pdfIn PDF document text
    • http://sonopewobu.pbworks.com/f/difference_between_adiabatic_and_isothermal_work.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd4d381e-712e-4968-bb94-bcd17c742214/31373805964.pdfIn PDF document text
    • http://xuwajesorewo.pbworks.com/w/file/fetch/144693462/fozasofisada.pdfIn PDF document text
    • http://ronefete.pbworks.com/w/file/fetch/144647616/blindspot_season_2_subtitles_subdl.pdfIn PDF document text
    • http://zexowisam.pbworks.com/f/what_are_some_advantages_and_disadvantages_of_geothermal_energy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d080abb-ca3e-4a3e-80fa-318b4875c484/kixiluxasiforisu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/857fb890-6745-4ea0-bad8-0cafe1fdf0d9/a_christmas_carol_middle_school.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6ee2108-c020-44df-aec4-4f9c8f7220f8/36480892898.pdfIn PDF document text
    • http://pakesobiroge.pbworks.com/w/file/fetch/144619422/how_to_make_graph_in_excel_sheet.pdfIn PDF document text
    • http://joxakuruvi.pbworks.com/w/file/fetch/144514455/x96_max_plus_android_9.0_tv_box.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8ee5be9-ba02-4f1d-af77-efa791d26003/what_is_exposition_in_a_story_plot.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_off0000eae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE9 5308 bytes
SHA-256: a035984a37ee693cad844682ddabf50d2c2ebae3c85a25a9c07229e3cedc4c18
font_01_sfnt_off0000fd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD23 10144 bytes
SHA-256: cc9c1e8c420b03b6c6c799d9200a5f471faef87f66065233b195116a25761b0b

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