Malicious PDF — malware analysis report

Static analysis result for SHA-256 eddceead4f3ead51…

MALICIOUS

PDF

107.3 KB Created: 2021-04-01 01:52:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 4c281a380c0906e7044795addf5d2c43 SHA-1: 61c7b46c9e4fc88669c076505699327a0543898a SHA-256: eddceead4f3ead51d3c9e77dc950ef7d1f278e07add251aa1ddb8ec12b944d65
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a tactic to obscure the true malicious destination by using a large number of redirecting links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://lozipotod.ru/award?keyword=bricks+beads+and+bones+notes+pdf PDF link annotation
    • http://lnstagramverifiedsbadgeforms.com/70793460784aknc.pdfIn PDF document text
    • http://jukojadijomefar.medianewsonline.com/grade_12_biology_textbook_nelson.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479710/normal_6001ad856a2e0.pdfIn PDF document text
    • http://netewe8.xyz/kakibafebagpo4ux.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/iEhamtK/9005309343.pdfIn PDF document text
    • https://kodavagimiwebod.weebly.com/uploads/1/3/5/3/135346487/leruxesimorekimat.pdfIn PDF document text
    • https://wujawosekeg.weebly.com/uploads/1/3/4/7/134712458/nakofojumi_mupop_jemevidax_segob.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465269/normal_5ffeb5787f4c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387408/normal_5fd6231464450.pdfIn PDF document text
    • https://dijozigi.weebly.com/uploads/1/3/4/7/134748041/gudozukipawipifeva.pdfIn PDF document text
    • http://zelumefepa.sportsontheweb.net/31680674798.pdfIn PDF document text
    • http://wikotimu.scienceontheweb.net/12080155908.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/how_wide_is_a_32in_tv.pdfIn PDF document text
    • http://shishkin-seed.xyz/catlogo_vieira_de_cdulas_brasileiras_6o_edio_202056vbq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368504/normal_5fe6ba64de62b.pdfIn PDF document text
    • https://cdn.sqhk.co/nulaliki/ieijhjg/namolezusulevikoni.pdfIn PDF document text
    • https://cdn.sqhk.co/zetuzire/hrjeSwA/talking_parrot_toy.pdfIn PDF document text
    • https://bipasakugerada.weebly.com/uploads/1/3/4/3/134350286/jiverozesitedukinipu.pdfIn PDF document text
    • https://visameme.weebly.com/uploads/1/3/1/6/131636817/f45db1e3.pdfIn PDF document text
    • https://cdn.sqhk.co/sobupepokor/gehfKji/wikipedia_logo_vector_free_download.pdfIn PDF document text
    • http://myyshooop224.site/59233925154mztex.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479446/normal_5ff97a066266d.pdfIn PDF document text
    • http://shopwithsale.website/tuvokenalith7eo0.pdfIn PDF document text
    • http://zememor.sportsontheweb.net/what_is_the_theme_of_sons_and_lovers.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kepawomokatuke.myartsonline.com/chuck_palahniuk_lullaby_quotes.pdfIn PDF document text
    • http://tizexazebubo.atwebpages.com/notutarulizefuki.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_off000166e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x166E3 5368 bytes
SHA-256: e815f7601947d20086edaf564350873be6c6289979e3cc04e5b481f3b37f093d
font_01_sfnt_off00017936.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17936 11652 bytes
SHA-256: b0694f1b316e82461eb414207e31506ce6b979a7e20dd8f9df1b8fc4825961da

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