Malicious PDF — malware analysis report

Static analysis result for SHA-256 2046203a2ac13db8…

MALICIOUS

PDF

75.6 KB Created: 2021-04-02 11:27:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: d8fd93b5ca7cd7c806e4c97a3b56d2f3 SHA-1: be66019724a662b475c6671b3a5b4a742a9f6ca5 SHA-256: 2046203a2ac13db8f0dd8922c9daa6d76e3abcd8f6cf3985e12a94817aada46e
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 0.9997

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://baarspo.ru/strik?utm_term=century+80+gasless+wire+feed+welder+120+volt PDF link annotation
    • https://bazanepuxakelu.weebly.com/uploads/1/3/4/3/134346533/tirorarolajedaro.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4416654/normal_5feed0e50a644.pdfIn PDF document text
    • http://rumafelaneli.mygamesonline.org/expired_polaroid_600_film_sx_70.pdfIn PDF document text
    • http://nijepatexosanus.medianewsonline.com/basic_english_lessons_for_beginners.pdfIn PDF document text
    • https://mixuvuweti.weebly.com/uploads/1/3/1/4/131483588/485030.pdfIn PDF document text
    • https://delazodudiz.weebly.com/uploads/1/3/4/5/134591817/9e2ef6.pdfIn PDF document text
    • https://porovepo.weebly.com/uploads/1/3/4/5/134527374/2461270.pdfIn PDF document text
    • https://wurilulisewanid.weebly.com/uploads/1/3/4/7/134728532/6239835.pdfIn PDF document text
    • https://baxovazexozubuv.weebly.com/uploads/1/3/4/3/134318553/fiwomezeritik_mofuminebosux_jilutabogi_dukek.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405184/normal_6042d70a91bc3.pdfIn PDF document text
    • https://bulumivivowusip.weebly.com/uploads/1/3/4/6/134667270/935504.pdfIn PDF document text
    • https://witukuvufun.weebly.com/uploads/1/3/4/8/134895732/xepuxerevewetoze.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/xeruxaxer/kanofo.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/psp_ps2_emulator_android_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/samsung_tv_series_6_have_bluetooth.pdfIn PDF document text
    • https://s3.amazonaws.com/mexijegedakol/prokaryotic_and_eukaryotic_cells_pogil_worksheet.pdfIn PDF document text
    • https://s3.amazonaws.com/risalenefazozo/9776298218.pdfIn PDF document text
    • https://s3.amazonaws.com/makixibawumebol/salems_lot_remake_2019.pdfIn PDF document text
    • http://legokejapo.atwebpages.com/mysql_workbench_tutorial_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/wefadep/97036799048.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_off0000eb09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB09 5752 bytes
SHA-256: ddfadbc0929e53da5daaec0b271ae1c2c47433b79d2c952d8080f319cb94bdaa
font_01_sfnt_off0000fed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFED1 10016 bytes
SHA-256: 1b8a279c55ca662291d034a4802a6ea9f31d7f076976dc91255ee230570afd74

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