Malicious PDF — malware analysis report

Static analysis result for SHA-256 434ee2d195af52c9…

MALICIOUS

PDF

85.6 KB Created: 2021-03-15 08:16:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: fdebf0cb4af38ead48a042a8421d367b SHA-1: 33abebb1d6d756c060746cca09a2a32d508e38fc SHA-256: 434ee2d195af52c99efe0a1b7ab6d3c616260b4c644c9e33627745af99cad6e2
66 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 is flagged by ML classifiers as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a link farm strategy, suggesting the document's primary purpose is to redirect users to external sites. While no scripts were explicitly extracted, the presence of embedded URIs and the ML classification strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • 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://lozipotod.ru/award?keyword=nyc+doe+school+calendar+2020+19+pdf PDF link annotation
    • https://cdn.sqhk.co/numiwuzuwix/Jhcgihc/girakiletetalawifufodok.pdfIn PDF document text
    • https://cdn.sqhk.co/bewewojiwo/hig3Yhi/border_patrol_in_texas.pdfIn PDF document text
    • https://cdn.sqhk.co/vizebika/U71aEhg/95097754684.pdfIn PDF document text
    • https://cdn.sqhk.co/zifuvifiweva/r6gPheE/fadevazagavejanexis.pdfIn PDF document text
    • http://junumidutuzakox.getenjoyment.net/amoeba_sisters_video_recap_of_mutations_worksheet_answer_key.pdfIn PDF document text
    • https://cdn.sqhk.co/vafodagusun/ij8jigi/over_smartness_quotes.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxolusufa/jvQhb4G/jetpack_jump_crazy_games.pdfIn PDF document text
    • https://cdn.sqhk.co/bipuzojafa/jhhcgjg/musicians_friend_coupon_code_april_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/lunajevon/PhigiMA/votiwexofuponosisavexoro.pdfIn PDF document text
    • http://xukoxulopimob.22web.org/wovumap.pdfIn PDF document text
    • https://cdn.sqhk.co/nunewole/hbrIwie/the_sims_tm_mobile_download.pdfIn PDF document text
    • https://cdn.sqhk.co/kebabefepu/gePjfia/57331285470.pdfIn PDF document text
    • http://rapoxarawiwalo.sportsontheweb.net/tp-link_av500_tl-wpa4220kit_manual.pdfIn PDF document text
    • http://bojukekaj.66ghz.com/3393514255.pdfIn PDF document text
    • https://cdn.sqhk.co/mamevugixej/geXaidl/lirigo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lepigofogirevog.epizy.com/biblioteca_del_bicentenario_de_bolivia.pdfIn PDF document text
    • http://xasejumav.onlinewebshop.net/wefemivetaripixuviti.pdfIn PDF document text
    • http://bumerezuwo.epizy.com/fusionner_mac_os_x.pdfIn PDF document text
    • http://mesobuze.epizy.com/difference_between_basel_2_and_basel_3.pdfIn PDF document text
    • http://gomojopovin.rf.gd/42779827158.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_off00010c97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C97 5796 bytes
SHA-256: aa37b116dfd31b6ccc86ce97b7e958a2d52e81f580afec730c81e21d24b6844b
font_01_sfnt_off0001205a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1205A 12232 bytes
SHA-256: 2bea6fd5c714e229860a54a45093425f44426dde077daf0723c2b75ebe277a2b

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