Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d68e121752fc6bf…

MALICIOUS

PDF

77.4 KB Created: 2021-05-25 13:17:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 483006111bef01c53bb1d31851052d4f SHA-1: 51410d7eec9e46f96fd4c92c079b0c9b5a72b104 SHA-256: 6d68e121752fc6bfc89c3a65079d74e584cbfd772b5b5049724b0b67a574979f
156 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. 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 0.9960

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 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.
  • 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://vilenefex.ru/strik?utm_term=geometry+10.4+inscribed+angles+worksheet+answers PDF link annotation
    • https://weralafopibobal.weebly.com/uploads/1/3/4/3/134338927/wikobegiregupefata.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374699/normal_5ff8fb3575097.pdfIn PDF document text
    • https://kowasazupajobex.weebly.com/uploads/1/3/1/3/131383373/8675845.pdfIn PDF document text
    • https://nafipitomaw.weebly.com/uploads/1/3/5/3/135349771/94264f8deb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481520/normal_6009ce66c73ab.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386597/normal_6013e174b05ef.pdfIn PDF document text
    • https://ferijadupegol.weebly.com/uploads/1/3/4/7/134705138/maxejobinirutam-lamire-mexus.pdfIn PDF document text
    • https://jutemutugitut.weebly.com/uploads/1/3/4/6/134617260/ruzafizowedej.pdfIn PDF document text
    • https://sijalafad.weebly.com/uploads/1/3/4/8/134887162/5052986.pdfIn PDF document text
    • https://novafonofijufi.weebly.com/uploads/1/3/4/4/134480525/79ce004817df7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481847/normal_60013c7527517.pdfIn PDF document text
    • https://pofexetebi.weebly.com/uploads/1/3/4/5/134592759/lubudunex_jojiku.pdfIn PDF document text
    • https://sudarixadozitot.weebly.com/uploads/1/3/5/3/135331315/gefer.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/dowadotiju/what_are_the_3_estates_of_france.pdfIn PDF document text
    • https://s3.amazonaws.com/geraromu/girenizeputufasoweronazon.pdfIn PDF document text
    • https://s3.amazonaws.com/rizoli/1._list_three_project_management_tools.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/docker_alpine_apk_add_proxy.pdfIn PDF document text
    • https://s3.amazonaws.com/bolovopizonuki/ribewomu.pdfIn PDF document text
    • https://s3.amazonaws.com/donake/les_miserables_musical_brief_synopsis.pdfIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/snes_emulator_roms_pack.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/pusejolanidojupadugida.pdfIn PDF document text
    • https://s3.amazonaws.com/kotenu/rujusurefaraxuriselefap.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/ww_monk_leveling_guide_bfa.pdfIn PDF document text
    • https://s3.amazonaws.com/wopari/how_to_test_smd_diode_with_multimeter.pdfIn PDF document text
    • https://s3.amazonaws.com/liwara/pidugugime.pdfIn PDF document text
    • https://s3.amazonaws.com/dejazuvorira/dopuzoxed.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ef23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF23 6096 bytes
SHA-256: 7d5ae0834db2deb58ecc77eb7e6a9736a8be92469af6ceeb7f5f1d2756318974
font_01_sfnt_off000103e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103E3 10472 bytes
SHA-256: db86efeb35b3844ff65cfba138d2f6a3292ec1daa2b24a747c175f48b5df0077

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