Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0115d1b3dcf9ac0…

MALICIOUS

PDF

104.4 KB Created: 2021-03-23 05:19:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1b1f1253835635cdd429fdceda85d379 SHA-1: 159bdd4e6192f34c4769df517030cd647c3db964 SHA-256: c0115d1b3dcf9ac019641594c81ef2a57b6e8c2a6bb135c634e7a2e59cc1c748
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 0.9994

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://druttle.ru/award?keyword=english+to+portuguese+dictionary+pdf+free+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4418786/normal_60096a5929015.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374963/normal_60385264efad6.pdfIn PDF document text
    • http://umkatrade.ru/em_casais_seguimos_estes_passos_para1at3b.pdfIn PDF document text
    • http://ita-bio.space/vokidajaxekeledisupo6nsyk.pdfIn PDF document text
    • http://fullcreditreport.info/rizawunufobeg3vty.pdfIn PDF document text
    • http://wodunobogigav.22web.org/what_does_dappled_mean_in_art.pdfIn PDF document text
    • http://pigokakiw.iblogger.org/improper_fractions_and_mixed_numbers_worksheet.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc824b30-5a6d-406d-9713-7b89a179d65d/25541880576.pdfIn PDF document text
    • https://s3.amazonaws.com/xisefowu/incumbency_certificate_uk_template.pdfIn PDF document text
    • http://tidofudavok.rf.gd/metugovenanaregadawe.pdfIn PDF document text
    • https://s3.amazonaws.com/xeroguru/love_me_if_you_dare_movie_ending_explanation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/272e01e1-deeb-4b9f-ae09-fb9dd8cfb493/64077667981.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/kulogomo.pdfIn PDF document text
    • http://puredaw.rf.gd/sikamanejovupise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/66c24e44-633b-4a2f-abe7-1504242fa78b/pijupomemujafalaxe.pdfIn PDF document text
    • http://vififaraw.rf.gd/92091603717.pdfIn PDF document text
    • http://pugagewuda.rf.gd/omron_evolv_review.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e293.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE293 16180 bytes
SHA-256: e233960bb0cf779d30460f1f7de00e27b525ba392eaab59362fbe260e7519da9
font_01_sfnt_off00011766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11766 5568 bytes
SHA-256: 05b84dc802327273f715aedc98a89f35308bb9a660dc722b9ccd33e055caa13e
font_02_sfnt_off00012a66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A66 9052 bytes
SHA-256: 2d55231370f8a5b5d34bbaf79049f33d4d59b4a14fde31362a74bad63bf20ec1
font_03_sfnt_off000143e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143E4 15188 bytes
SHA-256: a64eef29081ede1ed5ae7705732a52221849623eb7e44311b906bd91ab60bc94
font_04_sfnt_off000171cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x171CB 19264 bytes
SHA-256: 1056ef4fff9ce1725c56bcf8466cf92e3b959fd2af8b8a37868b13bf287c59f5

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