Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9c0ca7f0bf74bb8…

MALICIOUS

PDF

83.1 KB Created: 2021-05-22 19:37:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 72a4195cea2b073a2396d06896a83b53 SHA-1: 581bee46b21bbae5d24bcf9535839904de56dd46 SHA-256: b9c0ca7f0bf74bb8d46f5723190ea62adde2c0151ec0fc77d822f37ceca9ab6c
96 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 external URLs that direct users to attacker-controlled resources. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/strik?utm_term=finding+slope+from+a+table+graph+and+two+points+worksheet PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4420031/normal_603bc226390ac.pdfIn PDF document text
    • https://lesoloruvurer.weebly.com/uploads/1/3/6/0/136028926/2581070.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4452173/normal_5ff6b692cc618.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450438/normal_60615720e7fbe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388420/normal_605fac1025298.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419849/normal_601f001559347.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457849/normal_5fcb63ce6d4b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450243/normal_60323d7a684b0.pdfIn PDF document text
    • https://metonokosaza.weebly.com/uploads/1/3/2/6/132681587/zekar.pdfIn PDF document text
    • https://lerekisisag.weebly.com/uploads/1/3/1/4/131408666/8787167.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368763/normal_604d04c85dbad.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4464852/normal_5ff8fc0930cad.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/zijivevip/friendship_images_free_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6e28d1d-2d3e-46ff-b7d7-a1296edb7eae/letumejemobokakuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2da1762f-67f3-4d6a-9774-54694575d67a/67684433889.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ada826c-db04-4091-b762-68c109121ad0/bose_companion_20_control_pod_for_sale.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/59757344034.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/wavusujemirupamikokuxitop.pdfIn PDF document text
    • https://s3.amazonaws.com/wupixufekijax/23475136486.pdfIn PDF document text
    • https://s3.amazonaws.com/pujirageg/analects_meaning_origin.pdfIn PDF document text
    • https://s3.amazonaws.com/fowikorejodi/is_netgear_circle_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/tisegovofu/80149986746.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_off0001044c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1044C 5704 bytes
SHA-256: ebb649e9c85242d96e69761779e4e4197679cb3b46423927d267eef78e0b0b24
font_01_sfnt_off0001179c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179C 11244 bytes
SHA-256: 98cd8619a2e6f56847531c0b2c451cb346fc7f9ded3f8bc278f69226afb206e9

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