Malicious PDF — malware analysis report

Static analysis result for SHA-256 d05e196fd973eea5…

MALICIOUS

PDF

89.2 KB Created: 2021-04-20 11:18:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 9b6b84d0c95acfc36ad073356d384820 SHA-1: be8ecee6819705517fb325036638d6c0fbf6005f SHA-256: d05e196fd973eea5cd89a975dc74be6f29f462734ae400368b13fc93f3367a26
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and exhibiting link farm characteristics, as indicated by the PDF_SEO_DISPOSABLE_LINK_FARM heuristic. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. While no scripts were explicitly extracted, the presence of external URIs and the overall structure point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://ponafet.ru/strik?utm_term=malachi+martin+books+pdf PDF link annotation
    • http://tehnikator.ru/bmw_e30_bentley_service_manualz7odt.pdfIn PDF document text
    • http://islemleriniz.org/suit_punjabi_lyrics_video_download9z185.pdfIn PDF document text
    • http://evilcheats.fun/aditya_hrudayam_by_spb_mp3_free_download6rjcy.pdfIn PDF document text
    • http://chambreapp.xyz/40701104931vn1hf.pdfIn PDF document text
    • http://doordash.link/55609358378pf7k3.pdfIn PDF document text
    • http://lollipopa.online/fepaseguladnnzsh.pdfIn PDF document text
    • http://helpforteam.com/guitar_hero_or_rock_band_xbox_oneuhx9a.pdfIn PDF document text
    • http://tixshopclub.fun/comparison_superlative_worksheetd9n9r.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/nursing_drug_handbook_2020_free_downloaddlqtl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/10321de9-ab03-4b76-8691-af2c264a90f1/what_to_do_with_apple_tv_3rd_generation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8c1f2ce9-78bd-473a-bb24-a1c979af0c5e/muwisavuvenotewaduz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c4ee8b3-993c-48c7-9c64-73d989266ef1/html_and_css_for_dummies.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3eb5e41c-499f-4da9-a3db-625cc2a7204b/20521648486.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/how_to_connect_my_bluetooth_headphones_to_my_imac.pdfIn PDF document text
    • https://s3.amazonaws.com/wovitiku/assembler_language_tutorial_mainframes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d55e6f12-9535-4a14-b60d-a902453c20b4/22551376519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03de6a17-2925-48eb-bedc-ad04450f6aef/75960530807.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d94b3cb-f6cc-4daf-8a2e-3df1a2df3909/segimomesozes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a0e65243-38bc-45dc-a01d-52841f301ce5/jizur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ac97fac-6529-4a0d-9c58-d245d60129d0/34348111285.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/025c95be-a20b-478a-bca4-6caba2dc56ec/willow_log_table_lamp.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011171.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11171 5272 bytes
SHA-256: 2a5f2f18b6f9f75ce98689d4b3b565f14165a1d2848ea0c831322b4fae29575a
font_01_sfnt_off0001231f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231F 11724 bytes
SHA-256: d85fb7a652741ddef782c34afbf8ae7fc338c5a391f94ac5ccc9117120d40a23
font_02_sfnt_off00014933.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14933 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c