Malicious PDF — malware analysis report

Static analysis result for SHA-256 e857e27de345c1c3…

MALICIOUS

PDF

75.0 KB Created: 2021-02-23 01:22:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: aa4adb38984acd6a00007d7b58dc7e40 SHA-1: dfbb24d0f2bd7be3a0d66936b9420b611da8380e SHA-256: e857e27de345c1c3d14e02597210d9db1b636b42c76bf49726cdc8e510fd5cb8
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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://maypoin.ru/wix?keyword=unit+8+worksheet+1+mole+relationships+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4383460/normal_600750f754334.pdfIn PDF document text
    • https://cdn.sqhk.co/todiwapubu/icdgc3h/sudoku_hard_puzzle_book.pdfIn PDF document text
    • https://cdn.sqhk.co/nopavoboriru/eurkPBI/hepatic_portal_vein_system.pdfIn PDF document text
    • https://cdn.sqhk.co/tazuxalana/iiLZhg2/xezixasivarizupej.pdfIn PDF document text
    • https://cdn.sqhk.co/bujerinalo/cSie3he/technical_project_manager_salary_nyc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449605/normal_5ff2b26f26e6e.pdfIn PDF document text
    • https://buvefejam.weebly.com/uploads/1/3/1/4/131453018/f8258f951.pdfIn PDF document text
    • https://muwujexowosis.weebly.com/uploads/1/3/1/4/131437891/1942914.pdfIn PDF document text
    • https://cdn.sqhk.co/budotedo/jbgddif/dialect_quiz_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/tezizejaropu/dMgfghM/love_nikki_dress_up_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/zafowavo/gfljbf8/35797716895.pdfIn PDF document text
    • http://dikerulaba.22web.org/23956342092.pdfIn PDF document text
    • https://cdn.sqhk.co/fopujetoros/1jjd41G/kajoxizuv.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/fidefofudi/khokababu_bengali_movie_song.pdfIn PDF document text
    • https://s3.amazonaws.com/jenagubadopi/ads_on_android_phone_screen.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/xoloxewo.pdfIn PDF document text
    • https://s3.amazonaws.com/xufoxorog/algorithms_design_and_analysis_oxford.pdfIn PDF document text
    • https://s3.amazonaws.com/zetubakuz/bhakta_prahlada_naa_songs_free.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_off0000e4b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4B7 5452 bytes
SHA-256: e86fe7016be9a1f5efb84634b7e94f7cc545d60966bac9986f04dfd2b65cd2dc
font_01_sfnt_off0000f732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF732 11120 bytes
SHA-256: ba6b4e0faa833f307a00a473ffe493d46bdb43621d2fd9a9ac6c0ee07fc28d70

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