Malicious PDF — malware analysis report

Static analysis result for SHA-256 eab4f26a167bc9b8…

MALICIOUS

PDF

99.0 KB Created: 2021-03-04 03:23:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: d72a5244f083d1b31222de2c1a7914bd SHA-1: 244b7fd70d1b48957b52b3c2fd8083574ab496d4 SHA-256: eab4f26a167bc9b87b599a85459c957efdb887fd2426743924db759bac0729c9
66 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to various domains, many of which are associated with link farms and disposable hosting. The ML classifier strongly indicated maliciousness. While no scripts were explicitly extracted, the heuristic firings suggest the PDF is designed to redirect users to potentially malicious external sites, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/wix?keyword=pse+vision+compound+bow+manual PDF link annotation
    • http://xojuxelase.medianewsonline.com/how_to_pair_roku_remote_to_panasonic_tv.pdfIn PDF document text
    • https://cdn.sqhk.co/tarekekog/jdJiehb/34365742954.pdfIn PDF document text
    • http://vomimaforotagi.mywebcommunity.org/what_does_af_mean_on_my_maytag_dryer.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366947/normal_5fef188672de0.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/mothers_day_words_of_wisdom58v0i.pdfIn PDF document text
    • https://segawalapuk.weebly.com/uploads/1/3/4/9/134902876/doliloniwuw_vorazur.pdfIn PDF document text
    • http://myluckywin.site/wipatovakezeydp3.pdfIn PDF document text
    • http://salebox.shop/zesid40ven.pdfIn PDF document text
    • https://dadekubezaxinis.weebly.com/uploads/1/3/2/7/132740399/5ab5c3.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/33710177668.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478685/normal_5feff383cbd4d.pdfIn PDF document text
    • http://idealica-it.website/nedigerakawosavepazag0qf.pdfIn PDF document text
    • https://jitemino.weebly.com/uploads/1/3/0/9/130969659/wawapafo_purumunakonato_fikomu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421471/normal_5fd61a7c8c87e.pdfIn PDF document text
    • http://fukiwurezopukof.mywebcommunity.org/92453903809.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388276/normal_5fd6c63058146.pdfIn PDF document text
    • https://cdn.sqhk.co/gowamojon/jechjmp/66506211649.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/sefabe/online_marksheet_mp_board.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/tracfone_lg_rebel_4_review.pdfIn PDF document text
    • https://s3.amazonaws.com/kavugusepe/lawawodeve.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00015306.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15306 23304 bytes
SHA-256: e18f959ce2ad159e8ab2c7df40c338fba62a51763e18101b4f331e3d1d0ad95c
font_00_sfnt_off00011425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11425 5416 bytes
SHA-256: 82e01ea4ca8f8dcfad2737fe680d49ba34e854dbce0089e34e42b17df94ee8a5
font_01_sfnt_off0001268e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1268E 14152 bytes
SHA-256: 8633a7ec3a00037d1e3adffca133dd1ec8977f06cfffb6eeea7b54a798100ffb

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