Malicious PDF — malware analysis report

Static analysis result for SHA-256 8dd42da58e1e33cb…

MALICIOUS

PDF

110.1 KB Created: 2021-03-15 18:01:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 88b31c878251066d4c3776a7633b61d0 SHA-1: 3d904d517e65c0d8edce2671fef28e4e0dcdb016 SHA-256: 8dd42da58e1e33cb33a430d19ecc54193bbecdbc52cc1ae49ec6286370b79e91
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. 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 0.9990

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 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://bologen.ru/wix?keyword=shark+professional+steam+mop+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4475389/normal_5fe9aab6c866a.pdfIn PDF document text
    • https://cdn.sqhk.co/tudobele/dJidFIB/fabfitfun_fall_2020_edit_sale.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451563/normal_6004afb13227c.pdfIn PDF document text
    • https://cdn.sqhk.co/dibirolinu/byly3he/vietnam_era_music_60_s_70_s_youtube.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464869/normal_603be791d9e36.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374022/normal_601d218548d14.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472494/normal_5ff8d6c8c7e05.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446790/normal_6037165f2f626.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367305/normal_6039faf69442e.pdfIn PDF document text
    • http://medazuxa.mywebcommunity.org/garmin_920xt_manual_portugues.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444875/normal_6038e4f5434b7.pdfIn PDF document text
    • http://marifivelaj.mygamesonline.org/6298909442.pdfIn PDF document text
    • http://manovina.mypressonline.com/81421429397.pdfIn PDF document text
    • http://frankiearvelo.com/joleparonazh4vtl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454966/normal_5fdfadc3af915.pdfIn PDF document text
    • https://cdn.sqhk.co/lafuwexale/igjijbr/mazebert_td_strategy.pdfIn PDF document text
    • https://cdn.sqhk.co/parepejapoki/hayif2I/aide_ide_for_android_java_c.pdfIn PDF document text
    • http://podjem2.club/28099805104w4936.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://sorisavitekinuj.onlinewebshop.net/age_of_empires_2_the_conquerors_no_cd_crack_2.0.pdfIn PDF document text
    • http://xovefopu.myartsonline.com/antrenmanlarla_matematik_tamam_zml_soru_bankas.pdfIn PDF document text
    • http://wiloradakuno.onlinewebshop.net/paulo_coelho_hippie_book.pdfIn PDF document text
    • http://ruruwuvatokatal.onlinewebshop.net/53066324034.pdfIn PDF document text
    • http://kozogasivufi.myartsonline.com/molalidad_disolucion_formula.pdfIn PDF document text
    • http://tosurok.myartsonline.com/83521387301.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_off00016dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16DC8 5308 bytes
SHA-256: d40d29f4b65286aa969a7961c9cfe64e9db05d8ad2c72700f36e7027fb013e27
font_01_sfnt_off00017fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17FAB 12764 bytes
SHA-256: df1dbf7a7f41b4689930e702eb6f05455b3379d3300c2a93ce70d2e61a3210ac

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