Malicious PDF — malware analysis report

Static analysis result for SHA-256 514cb2332d10ffa3…

MALICIOUS

PDF

77.6 KB Created: 2021-03-17 17:12:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: b166b286061611c17a60309a740f6ffe SHA-1: 5a99a1b96b898c84a2245a271b5845039c39a5de SHA-256: 514cb2332d10ffa311c9e7ade11e16958a1d52e7af9f42ec130cd0b60f752e6e
66 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs pointing to disposable domains, a characteristic of link farming and SEO manipulation. The ML classifier strongly flagged this PDF as malicious, and the heuristic analysis identified it as a link farm on disposable hosting. While no scripts were explicitly extracted, the presence of embedded URLs suggests potential for redirecting users to malicious sites or downloading further payloads.

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://dugedepap.ru/wix?keyword=the+awakening+chapter+30-35+summary PDF link annotation
    • https://cdn.sqhk.co/nimuxugemu/ghi4jcU/furub.pdfIn PDF document text
    • https://cdn.sqhk.co/wixefawoz/m3igigx/hello_neighbor_hide_and_seek_apk_uptodown.pdfIn PDF document text
    • http://guzoseta.getenjoyment.net/algorithms_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/bitizulokiva/ibiglib/aen_downhill_mountain_biking_gear.pdfIn PDF document text
    • http://trastenmyqort.online/walurolotakuduhneap.pdfIn PDF document text
    • https://cdn.sqhk.co/towevefizub/chhgcja/80489940888.pdfIn PDF document text
    • http://zifixoribe.scienceontheweb.net/yamaha_hs8_subwoofer.pdfIn PDF document text
    • https://cdn.sqhk.co/sizebadit/hiBDujg/26797823623.pdfIn PDF document text
    • http://patajafurep.mywebcommunity.org/32401233216.pdfIn PDF document text
    • https://cdn.sqhk.co/wejideduv/aBIJDTI/fobivolosuri.pdfIn PDF document text
    • http://lamisorosasam.mywebcommunity.org/69173803201.pdfIn PDF document text
    • http://wozupabalaviv.medianewsonline.com/tuwudilom.pdfIn PDF document text
    • http://covid-19online.site/wiladunaridumewitot562.pdfIn PDF document text
    • http://xamoxipuwizutux.scienceontheweb.net/martin_luther_king_last_speech_words.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/yjgDgcB/traffic_rider_3d_heavy_bikes_traffic_escapes.pdfIn PDF document text
    • http://gukevipagopu.mywebcommunity.org/56234250445.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sogivuwe.onlinewebshop.net/edit_pages_on_ipad.pdfIn PDF document text
    • https://s3.amazonaws.com/kefiperizonofu/most_common_gre_words_magoosh.pdfIn PDF document text
    • https://s3.amazonaws.com/vaxebisapesi/vmware_workstation_14_for_ubuntu.pdfIn PDF document text
    • https://s3.amazonaws.com/bifadiwuwileji/ninujinaxuzodovetozebat.pdfIn PDF document text
    • https://s3.amazonaws.com/vizegemawokaxe/spanish_frequency_list_1000.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_off0000f147.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF147 5984 bytes
SHA-256: 2648db15e11fd9a3fda25e6bfcb854d4a747549d0cd7db9f626af45ce7a14fd3
font_01_sfnt_off000105a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A8 10876 bytes
SHA-256: 5d3eda230ab6e990653ed2332d6b88596bf5ad318d0b9b13e05aef160b377ea2

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