Malicious PDF — malware analysis report

Static analysis result for SHA-256 0759439220c0b468…

MALICIOUS

PDF

69.4 KB Created: 2021-03-30 06:41:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6ebda3235f30663287326124edbdec10 SHA-1: 3e7c9c514bf8137156c3a315477a6e619c458ae9 SHA-256: 0759439220c0b4689097f61d7d766417e50ffa2ab710c372226b55087d418674
96 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or redirection scheme. One of the primary external URIs points to a suspicious domain, while another embedded PDF URL is also flagged. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the structure and heuristics point towards a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 4

  • 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://druttle.ru/123?utm_term=haareya+salim+song++pagalworld PDF link annotation
    • http://kerorakesona.22web.org/sotaxopajirukurujened.pdfIn PDF document text
    • http://dusogewosat.iblogger.org/altiplano_game_rules.pdfIn PDF document text
    • https://cdn.sqhk.co/xuzuvazol/ge2haT8/hd_wallpapers_download_for_android_mobile_1080p_girl.pdfIn PDF document text
    • https://cdn.sqhk.co/vuveleni/5iaiggj/bvg_group_full_form.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://saduzubut.rf.gd/84919486425.pdfIn PDF document text
    • https://c7bff75e-0a19-4817-9d47-fca4cf08161b.filesusr.com/ugd/3b6424_336b6ba981ad4b7d883a7250aea74561.pdf?index=trueIn PDF document text
    • https://87c8fc71-818b-4167-bf0d-2ac3bc49ffd1.filesusr.com/ugd/f9d4cd_101325ebe8c94fb9a0191b7dcc712b03.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/mutixamazasobuxizowofo.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/4475324534.pdfIn PDF document text
    • https://s3.amazonaws.com/dezajok/coleman_inflatable_hot_tub_cover.pdfIn PDF document text
    • http://kirojera.rf.gd/nadodarewozurisa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fa9f864-45b4-44ec-a50c-db7e56d3bbb1/how_do_you_connect_roku_to_wifi_without_remote.pdfIn PDF document text
    • https://s3.amazonaws.com/poguvelefa/97599882979.pdfIn PDF document text
    • https://a0bbd489-bf03-48a0-8e93-88abd0751e5b.filesusr.com/ugd/370ea2_74a58b617156401d9757d39debe540d1.pdf?index=trueIn PDF document text
    • https://0e098354-e5d1-4afc-9be7-763a70ae5e44.filesusr.com/ugd/ef253e_63dbd406d0e24d9baea38ed3f442061b.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/cea13e93-230b-432a-bef4-5ba289cbd797/94216714553.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4321cf55-97e6-47ec-af19-9fe3e6648bad/2008_ford_f350_repair_manual_free_download.pdfIn PDF document text
    • https://a4758657-6aaa-4003-b0f6-1957e800abfd.filesusr.com/ugd/70c1f8_9ffdc5c9581b4a42813fb7267f1217c3.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/lovomijelun/reading_comprehension_worksheets_for_5th_grade.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/tawixigux.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/43362121904.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a364f7b0-d76c-4d3b-a2aa-c5c63b2b9f97/ice_breakers_candy_mints.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c52e6762-f92b-44f6-846f-a04c0d897132/rainbow_study_bible_app.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_off0000cec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEC2 5436 bytes
SHA-256: 67438b66197413dff59808356cbba81afeb37b8ce468d6f047b810bb6769c0f6
font_01_sfnt_off0000e13f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE13F 11344 bytes
SHA-256: 917e6e6aa82a3c720d2b8bba34d589133e05bf4c8d7377364e1c97b92a9212a9

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