Malicious PDF — malware analysis report

Static analysis result for SHA-256 6448e083bd2b8390…

MALICIOUS

PDF

86.5 KB Created: 2021-05-30 22:46:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3653628a8b95f6325890d5f2aaa0240c SHA-1: 72c91e866621cdf37a338665febad5184411853a SHA-256: 6448e083bd2b8390da3fe3ae80ff05c308a977ead91bc4deb6a5a7fe90503f15
156 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains an external URI pointing to 'mezovuduw.ru' which is likely part of the lure, disguised as a Windows 8.1 key. The PDF also contains a link farm with numerous external PDF links, suggesting an attempt to distribute further malicious content or engage in SEO manipulation for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/strik?utm_term=chave+do+windows+8.1+single+language+32+bits PDF link annotation
    • https://gozezitigaja.weebly.com/uploads/1/3/4/3/134340412/4378810.pdfIn PDF document text
    • https://resagivet.weebly.com/uploads/1/3/1/3/131383325/9422736.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469831/normal_6011c266ae2b3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366949/normal_6010771c43a54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446026/normal_601aab4242312.pdfIn PDF document text
    • https://nelibijejukeli.weebly.com/uploads/1/3/1/4/131437261/nujamamimad-visanuwogugome-wiwavixazu-wexobiwopit.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/a694f95b-a9cf-4186-9fc4-7b7be15ed340/nufadevajawi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cc39146c-101b-46e5-a839-c5b6b9dbe36d/jado_ambra_barasya_pani_mp3_song_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b1d16bcf-55d3-4318-8999-dc097045d76e/18737202935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1ed7138-1f26-4791-9aa9-1c42aead1f09/68848163508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/127cd405-ea35-498b-af20-3f672b0afa57/nakukotaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3940cf9b-68f4-40ec-8c70-c438b9c44b4b/gone_with_the_wind_cast_where_are_they_now.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29370228-7e4f-41d2-a042-c2aebcffb636/xuxopat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7241cb93-0ec0-404e-9852-d6243b5da683/41707349163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41090c35-a80e-4774-82ca-413d51f02775/dnd_sheep_token.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3282f1d2-1c4c-4d57-a1f4-9f32179ab73a/pronombres_personales_del_italiano.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cb5d4cf0-4c7f-4265-87b1-4e97afb634ec/96208403878.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f9c87dbf-696e-4b6d-a2ec-58178e4b878c/natudojuwi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4866b18e-4141-4771-a9da-9d985f9f3a05/pikuvaza.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0a84badc-e23b-4a6d-bb72-38c42848e9f3/jibokapexi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ce1d24ca-2acf-4c4e-98ef-59b6e7996d7d/pictures_of_the_cutest_animals_in_the_whole_wide_world.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e725447-178b-4e04-a218-65cb0d4192a0/gozopasuvotagofopu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12ef0368-73a0-42c3-ae2b-55de4ac08645/golds_gym_trainer_430i_treadmill_weight_limit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d3b0f01-d234-424e-be65-6e2ca31472a6/how_to_do_good_character_development.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b478e0b-ea03-4c6e-a396-637f34d2f247/18120122961.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_off00010928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10928 5760 bytes
SHA-256: c5a70fe2e438c1fd719f88cc4368ac0649eb10e1f4377f5f738c8c9d47d5d1c0
font_01_sfnt_off00011cdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CDD 19848 bytes
SHA-256: 22d5a92232e4ec03e667b356bfeb07c1285942bd697fb88305d4cd4d958a841b