Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b3603bb8a612976…

MALICIOUS

PDF

76.6 KB Created: 2021-04-04 11:07:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 9b3d7a9371f5ba667dad617d8ad22bf0 SHA-1: dc19ab298c32a7bc1e8c4db4f27d76e7a474d307 SHA-256: 6b3603bb8a61297652eab78a81cbfa56b581cc215564e0daad4312d1e4775efa
134 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains embedded JavaScript and numerous external URIs, many of which point to disposable domains and link farms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish for credentials or deliver further malware. The presence of embedded JavaScript (T1059.007) suggests an attempt to execute malicious code upon opening the document, leading to redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://resalured.ru/strik?utm_term=english+literature+degree+jobs+canada PDF link annotation
    • http://womans30planet.com/77383305594v8kan.pdfIn PDF document text
    • http://ptmonline.ru/castaway_on_the_moon_freez238k.pdfIn PDF document text
    • http://123dutch.com/sitivimuzutulu46dii.pdfIn PDF document text
    • http://badgesverified.com/how_to_bucket_fill_in_procreate_pocket3fou2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480162/normal_5fd8a08cb6da6.pdfIn PDF document text
    • http://kenufapozij.22web.org/kigisunavufatuwevezuf.pdfIn PDF document text
    • http://dronextactical.xyz/17188322059jnxik.pdfIn PDF document text
    • http://krepezh.guru/garmin_astro_220_dog_collarslouh5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366339/normal_6062146f43300.pdfIn PDF document text
    • http://gomijojupi.iblogger.org/41204651020.pdfIn PDF document text
    • http://bitcoinlearningcentre.online/boss_therm_brtrf_user_manualb3pxr.pdfIn PDF document text
    • http://exampl1214.com/derechos_humanos_en_argentina_lista3prnu.pdfIn PDF document text
    • http://muzojumovove.iblogger.org/oecd_transfer_pricing_guidelines.pdfIn PDF document text
    • http://tamakar.tech/it_works_book_amazon59bvs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xetaratof.rf.gd/9211300739.pdfIn PDF document text
    • http://gibagefozilot.epizy.com/wynk_music_mod_apk_free.pdfIn PDF document text
    • https://s3.amazonaws.com/zinudipir/mobile_call_blocker_free.pdfIn PDF document text
    • http://pogadimubafixi.rf.gd/irs_publication_523.pdfIn PDF document text
    • http://besuwodusibix.rf.gd/51388006005.pdfIn PDF document text
    • https://s3.amazonaws.com/sumesawoxajew/cloud_platform_as_a_service_examples.pdfIn PDF document text
    • https://s3.amazonaws.com/woberiz/89991802813.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/50785737169.pdfIn PDF document text
    • http://pusudusak.rf.gd/xilijon.pdfIn PDF document text
    • http://femumakowaw.epizy.com/wonusar.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/format_in_writing_application_letter_for_scholarship.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_off0000ee2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2C 5376 bytes
SHA-256: 3aac5b564e6d4b53a6a357d68b9f8223af0b737c9ad9bd79c32203f6923624fe
font_01_sfnt_off0001006e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1006E 10656 bytes
SHA-256: 696a3869a114035a67414d0805314ce504addd3e89609e1e63b42752a089d359

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