Malicious PDF — malware analysis report

Static analysis result for SHA-256 f803e314b37e05f3…

MALICIOUS

PDF

75.0 KB Created: 2021-02-23 07:13:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 9859e5f5e2aca55ad4897e722b49992e SHA-1: 6dba2d0adc87e0b8157f99b3a65e1de1aefe4075 SHA-256: f803e314b37e05f398ccefd17e25db006652aa1904a0102be3ecb2c546578fb8
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=perkins+6-354+water+pump In PDF document text
    • https://cdn.sqhk.co/kesufetumo/ajc5nge/55860992079.pdfIn PDF document text
    • https://cdn.sqhk.co/ponajadu/b7mgjhe/kajajozoka.pdfIn PDF document text
    • https://cdn.sqhk.co/kisesawaropo/rBjcvgh/35495984703.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421352/normal_602f9664e155e.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/7tZiaIB/english_stories_online.pdfIn PDF document text
    • https://cdn.sqhk.co/dinigivo/jf3jgja/12739204653.pdfIn PDF document text
    • http://voseboler.iblogger.org/saki_saki_new_song_bestwap.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496853/normal_5feb96ae66120.pdfIn PDF document text
    • http://design-kvartira.info/todos_los_libros_de_juego_de_tronos_en_espaolxc1qr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://kanisisasulaba.rf.gd/white_brick_wall_texture_free.pdfIn PDF document text
    • https://s3.amazonaws.com/midaguvimabof/elapsed_time_word_problems_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/wulagisi/guwolilanutidunime.pdfIn PDF document text
    • https://s3.amazonaws.com/rufonali/angular_formgroup_validator_pattern.pdfIn PDF document text
    • https://s3.amazonaws.com/lotibabakuj/15424366721.pdfIn PDF document text
    • https://s3.amazonaws.com/falufusu/7271115187.pdfIn PDF document text
    • https://s3.amazonaws.com/tinajabizoreguf/lagu_arkana_band_pasrah.pdfIn PDF document text
    • https://s3.amazonaws.com/jajuzasalikirut/87494773753.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/weluziwawixowapaterev.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_off0000e7e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7E1 5652 bytes
SHA-256: ac29be8147c3b1e11ed840e884da4091f6a6e989854bf6230df767b9bf2cec2a
font_01_sfnt_off0000fb30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB30 10628 bytes
SHA-256: c0268b84c8b2df453ffb545f18963178c67520d515042d7571f65973a35f0987

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