Malicious PDF — malware analysis report

Static analysis result for SHA-256 025953d78db6108c…

MALICIOUS

PDF

84.0 KB Created: 2021-02-25 00:11:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: d074ca6c7c1f87566b477bfac11b6e33 SHA-1: 605e13a2f5ca109ac458fc53be2a2f647b25f46d SHA-256: 025953d78db6108c6ee25e28f3d0df1d3cf56fb7d55603e80f354c5382e282a6
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to disposable hosting services and are likely malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a link farm designed to host malicious content or redirect users to phishing sites. While no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence indicate a malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/123?utm_term=death+cure+book PDF link annotation
    • https://sasozubavurak.weebly.com/uploads/1/3/4/8/134886198/8475655.pdfIn PDF document text
    • https://julavatevimire.weebly.com/uploads/1/3/4/6/134669339/gopigixe.pdfIn PDF document text
    • http://grizhoff.ru/espn_basketball_fantasy_cheat_sheetzujlc.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/fokebo.pdfIn PDF document text
    • https://fabebebu.weebly.com/uploads/1/3/2/7/132740756/wexulemirufowik-todapi-rovobawi.pdfIn PDF document text
    • http://legko.travel/final_reich_walkthroughvc62i.pdfIn PDF document text
    • https://juzudibat.weebly.com/uploads/1/3/4/3/134328144/filatu-rugozogalodifer-sowidazo.pdfIn PDF document text
    • http://dorightunion.com/bushnell_tour_v2_slope_manualsrkui.pdfIn PDF document text
    • http://mmeueue.space/salumalab2g66k.pdfIn PDF document text
    • http://redirunna.xyz/i_ready_quiz_answers_level_c_readingriq6o.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rorives/skinny_love_piano_accompaniment_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/96712706862.pdfIn PDF document text
    • http://zotubune.myartsonline.com/how_to_read_an_ebook_on_ipad.pdfIn PDF document text
    • http://pikubub.onlinewebshop.net/zojubimapeduvexobajem.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/73207529224.pdfIn PDF document text
    • http://gewapapis.epizy.com/68956044162.pdfIn PDF document text
    • http://saxodanokijaj.atwebpages.com/81254319528.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_off0000f7d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7D9 5616 bytes
SHA-256: aec5aa930485c4fc94534fe537c23b9a1e80db78653dfffbecfc582eb76f816f
font_01_sfnt_off00010b6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B6E 4880 bytes
SHA-256: 8e2fd90a93076bd148f1e83ad9daef5f3a810e911c8818effaf8739410b6517a
font_02_sfnt_off00011c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C07 11464 bytes
SHA-256: b6b80e63a6ff8986a1301a0b46d2aafbe2cf425f6540c35d5d9d1db71066a5ef

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