Malicious PDF — malware analysis report

Static analysis result for SHA-256 033e4e6da4e1aeca…

MALICIOUS

PDF

126.8 KB Created: 2021-04-04 15:05:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 8860dad83eb9e50f6f33d5edcd447217 SHA-1: ab9e2308f584ef13a3bff614533813694bf68f93 SHA-256: 033e4e6da4e1aeca2af774d0226bfb46a6667dbe9a78ccfdf8b8eb72d71ebace
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to external websites, many of which are hosted on disposable domains and flagged as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The presence of external URIs and the link farm heuristic suggest the document is designed to redirect users to potentially harmful sites.

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://xajibur.ru/award?keyword=automatic+transfer+switch+schematic+diagram+pdf PDF link annotation
    • http://wegansit.space/tutorial_membuat_website_wordpresscv7re.pdfIn PDF document text
    • http://gratoramm.website/95847084597ltc4f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482218/normal_6028fbf6c50aa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498366/normal_601608a974693.pdfIn PDF document text
    • http://extrameets.fun/the_hardest_would_you_rather_quiz_everv3iv6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413987/normal_6008885d15ae7.pdfIn PDF document text
    • http://fitness-ital.fun/how_to_connect_jam_2_speakerraums.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385435/normal_604331b2e8edb.pdfIn PDF document text
    • http://trokot-online.xyz/27403716423xdfb7.pdfIn PDF document text
    • http://aarbuz.space/hastie_group_limited_annual_report_2011xdase.pdfIn PDF document text
    • http://sweetygirl.club/442863346632owh1.pdfIn PDF document text
    • http://study-english-04.space/todajinikiba95cb.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/add92878-03ea-4514-a284-55738069544c/8103362102.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8694ad34-375c-402a-a0b2-d00b0c01a62f/what_is_a_claim_in_argumentative_writing.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fc210ce-2da2-4afa-b495-2245565b6324/saga_harry_potter_editorial_salamandra_precio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7799c4f-16b4-4f36-b9ca-56b5677756c9/romeo_and_juliet_1996_full_movie_google_drive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28fddbf1-959f-4524-a458-d81d3a615376/integral_x_cos_2x23_dx.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19e66e20-1d8f-4322-9cf7-9d5e2e53a6eb/attack_on_titan_season_4_last_episode_release_date.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52752c5f-d3c6-46cf-a66f-929793529ff2/life_fitness_bike_screen_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/187df605-ab5a-4e32-a9f9-e8e18339e19c/can_you_make_a_smoothie_with_frozen_fruit_and_ice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6743cdda-43b2-49bc-a078-f9ce7d352481/what_causes_a_kitchen_faucet_to_leak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ceaebb6d-7892-4ab1-b36f-6bf1436470d5/how_much_weight_can_a_8ft_trampoline_take.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cb4e293-9f66-41f0-9d2a-51d7cd8c813c/digitech_rp1000_guitar_multi-effects_processor.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_off0001b163.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B163 5616 bytes
SHA-256: ebc70cb3baaa6cdd8b819791e5d71d7fbeeeb9ad4ddf10f8cf51e4e0f6bab656
font_01_sfnt_off0001c460.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C460 11984 bytes
SHA-256: df0c9c533b6cfdc940f46f61d3b93dac3e3d572fa815cc295b4e4f32a3d53c29