Malicious PDF — malware analysis report

Static analysis result for SHA-256 35670354a2fa43bc…

MALICIOUS

PDF

74.0 KB Created: 2021-03-15 20:29:10 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 5be1bf6edd9ed06fcb17558d5a581105 SHA-1: 9895aea38148ca7d6a7c24c39784eb9bd66fe29d SHA-256: 35670354a2fa43bc14ea4efc668f7e07a8eb2ef41f9197d4e0d2eb5f3c26ca06
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://fokemale.ru/wix?keyword=general+chemistry+solutions+manual+4+edition+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404124/normal_602c06dda281b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393628/normal_5fcfa5796962f.pdfIn PDF document text
    • http://zizodoroluxonaf.sportsontheweb.net/likigizobebajuwikafijafu.pdfIn PDF document text
    • http://zipogagu.iblogger.org/barca_transfer_news_bleacher_report.pdfIn PDF document text
    • https://cdn.sqhk.co/xejadukoxeta/jiggDqg/75257467876.pdfIn PDF document text
    • https://cdn.sqhk.co/loxowopiv/gCKjUhi/totopos_de_maiz_azul.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367919/normal_600c005cb09e7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4477658/normal_5fc5ecc1e4062.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisimak/heeghjh/17000039209.pdfIn PDF document text
    • http://benodemutuvi.22web.org/ccleaner_professional_plus_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390074/normal_6043a250a5225.pdfIn PDF document text
    • https://cdn.sqhk.co/pisomuma/ghD4gdg/airline_manager_4_mod_apk_latest_version.pdfIn PDF document text
    • http://dexaputanit.mygamesonline.org/steel_almirah_price_list.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://84bd2c60-91d0-47b6-9565-6ae8a6593e58.filesusr.com/ugd/963627_374e55bb3f1b4208a570c39145bcaa73.pdf?index=trueIn PDF document text
    • http://ledojefuvase.rf.gd/management_consultant_cv_templates.pdfIn PDF document text
    • http://datidogebe.epizy.com/cursive_writing_worksheets_letter_m.pdfIn PDF document text
    • https://3794eb9c-cc8b-492c-aecc-44533f76aaa6.filesusr.com/ugd/1ee69b_ed20d91a82c84ba686b101ec33152eda.pdf?index=trueIn PDF document text
    • http://sidepojedava.myartsonline.com/core_connections_algebra_1_chapter_4_answers.pdfIn PDF document text
    • http://rodisasedozax.myartsonline.com/87476889125.pdfIn PDF document text
    • https://99a51e5b-0970-4a55-8da9-66b0886d76df.filesusr.com/ugd/a58502_d773aa5c9b9844c8b905d87d112018fa.pdf?index=trueIn PDF document text
    • https://200ee3fc-349d-4871-b5c3-2c1c69b60476.filesusr.com/ugd/7b00a0_dfb48bd8d03c4c5f9936c913a0b7900c.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d4a8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4A8 5496 bytes
SHA-256: a9feaa6250f01cea89fc6c96c89e58f50be88253788994d4e1b7d68706abeae7
font_01_sfnt_off0000e734.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE734 10832 bytes
SHA-256: d3c03476dff2ea74a252c0c762b018e81ac4ecd3e59ec16a68e6b8f9ec2de6b6
font_02_sfnt_off00010c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1B 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f

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