Malicious PDF — malware analysis report

Static analysis result for SHA-256 d53474fae4c38836…

MALICIOUS

PDF

69.1 KB Created: 2021-02-18 19:47:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: dd255b151280417059a712a3c85e9192 SHA-1: c47f32b6ea66fff1c083541c14264155292b2724 SHA-256: d53474fae4c3883662bf57b2f5cfe3ec29819334ee17d4562e45346e4f697661
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://jottigo.ru/wix?keyword=noun+verb+adjective+worksheet+2nd+grade PDF link annotation
    • http://cz-nitrof.website/zuduliwitebebigozupafobrlvpm.pdfIn PDF document text
    • https://fujareke.weebly.com/uploads/1/3/5/3/135391043/rojokinijoxenuv.pdfIn PDF document text
    • http://italywow.pro/lojudell9ufj.pdfIn PDF document text
    • http://nunokitatamipo.22web.org/juvogabigisiruminaluziw.pdfIn PDF document text
    • http://murezisafedamaw.22web.org/free_audacity_with_crack.pdfIn PDF document text
    • http://rabejagoruwobol.66ghz.com/what_is_child_directed_play.pdfIn PDF document text
    • http://thecaffeinatedstudent.com/movie_songs_trivia_questionsdzjqm.pdfIn PDF document text
    • https://katalulipof.weebly.com/uploads/1/3/2/7/132710678/tenilulukixobaz.pdfIn PDF document text
    • https://valodoxajub.weebly.com/uploads/1/3/4/4/134435871/wuxobazamoturaj.pdfIn PDF document text
    • http://probnik1313.tech/basoweragaslre7p.pdfIn PDF document text
    • http://train-home.ru/gimej9lozs.pdfIn PDF document text
    • http://private-channel.site/computer_science_an_overview_12th_edition_brookshear9zhx0.pdfIn PDF document text
    • http://lovemecompletely.com/63095292858bj115.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/fulazelof/9430439568.pdfIn PDF document text
    • https://s3.amazonaws.com/gurowozenupifi/giant_defy_3_size_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/tumasun/86529585890.pdfIn PDF document text
    • https://s3.amazonaws.com/wefemabeni/ice_hockey_goalie_stat_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/tawosutosuxi/anemia_hemolitica_recien_nacido.pdfIn PDF document text
    • http://gorudagomi.rf.gd/bar_bahar_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/fokapikow/buick_century_1994_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/tomamujuf/logic_puzzles_presented_by_puzzle_baron_answers.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_off0000d1c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C5 5700 bytes
SHA-256: 3166b7a6c3e0e1a399d541b60697594adca400544a5b2a4b80d8bbf08706d820
font_01_sfnt_off0000e54d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE54D 9716 bytes
SHA-256: d14a7d075277d4d4f90936517cddb80c4e1009c3dd3de81ed087b73c78eb9ce6

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