Malicious PDF — malware analysis report

Static analysis result for SHA-256 f955e4108bd4384b…

MALICIOUS

PDF

79.1 KB Created: 2021-04-07 22:16:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: c57e8b164ab1a49683b6f2008bfb2f27 SHA-1: 5a76472651dcdd459f1c9cbc64f8fe2e1db85e93 SHA-256: f955e4108bd4384bada1391e9a5b5d85722403ceca098462ed72105d6807dcbf
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 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/strik?utm_term=como+pasar+de+milimetros+a+pulgadas+en+fracciones PDF link annotation
    • https://cdn.sqhk.co/puvivefujef/dD4hauT/tekafunuzunebexoxiwarolig.pdfIn PDF document text
    • https://cdn.sqhk.co/metexemoraga/cHghgjE/69263107599.pdfIn PDF document text
    • https://cdn.sqhk.co/varugefezum/Sif2gBO/raxub.pdfIn PDF document text
    • https://cdn.sqhk.co/sifalavuxozo/hqhpooy/episode_choose_your_story_mod_apk_ios.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489259/normal_60188abf7c6ba.pdfIn PDF document text
    • https://cdn.sqhk.co/denalivek/eibUicM/suxaruxuwiwadasabivovole.pdfIn PDF document text
    • https://cdn.sqhk.co/vipujitebiki/aieMiiU/kaiser_permanente_jobs_westminster_colorado.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383692/normal_605f8a5aa02de.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/190adffe-e9ad-4d85-9f15-ab15319c10a1/12126034212.pdfIn PDF document text
    • https://s3.amazonaws.com/dozuga/canal_boat_magazine.pdfIn PDF document text
    • https://s3.amazonaws.com/mijumomub/xudixutugegilupoju.pdfIn PDF document text
    • https://s3.amazonaws.com/likadojivivofu/77628314552.pdfIn PDF document text
    • https://s3.amazonaws.com/tevigotu/40770646755.pdfIn PDF document text
    • https://s3.amazonaws.com/popisiburewixuj/milpds_how_to_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/rebesudanolo/53854926597.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22fa68e2-fb8c-4061-bb52-b9ab37b194fd/zezojimozo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96790c47-1bca-4dd3-b144-3b062c661ecb/ramana_maharshi_guided_meditation.pdfIn PDF document text
    • https://s3.amazonaws.com/kobivimelelo/72604032743.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f19adfb4-4a96-46e5-b1d3-3ded1c334c8b/kanodax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fb9a8363-1425-42ce-9b36-5b6997c6b41b/powupesonatijuv.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_off0000f412.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF412 5380 bytes
SHA-256: 25b02539f63c3d6639861812c0c9ca870e5e645a96e3607f7d541463bcd26a9d
font_01_sfnt_off00010644.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10644 11876 bytes
SHA-256: cd2472c179cba02aeca09acf2d7be4296c750f9453dab9f21b9ff31a3c1204ea

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