Malicious PDF — malware analysis report

Static analysis result for SHA-256 9952a60f68599aaf…

MALICIOUS

PDF

76.5 KB Created: 2021-03-01 21:23:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 2170149ed75ded96847396fc4fd25939 SHA-1: 811f7cfb80114ddbdca0869117aa4c2d74b0af4f SHA-256: 9952a60f68599aafa5e66a5427c81e1e6d308f79557c0c9a9b84492e805f158a
236 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, indicating malicious intent. The document contains lures related to password resets and instructs the user to copy/paste content into a shell, a common tactic to execute malicious commands. It also contains numerous external links, suggesting it's part of a link farm or distribution network.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://soxebez.ru/award?keyword=how+to+reset+netgear+extender+password PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4404292/normal_5fec933de4896.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387716/normal_5feb158156c4a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412377/normal_60338aaa9cc0d.pdfIn PDF document text
    • http://jukekabotika.22web.org/59454764275.pdfIn PDF document text
    • https://zotizoju.weebly.com/uploads/1/3/5/3/135349435/743674.pdfIn PDF document text
    • https://rixukiwifezi.weebly.com/uploads/1/3/5/3/135392959/fiketujitej.pdfIn PDF document text
    • http://naguvogegexaze.22web.org/adjectives_definition_and_examples.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489601/normal_603a4e468e5bc.pdfIn PDF document text
    • https://biwawidojimu.weebly.com/uploads/1/3/4/6/134648839/a345d6a.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/ecuaciones_de_segundo_grado_ejemplos_con_grafica.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408172/normal_603b113a60db4.pdfIn PDF document text
    • https://terovudomam.weebly.com/uploads/1/3/1/4/131406893/pudapaxulugebano.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/satuja/443939716.pdfIn PDF document text
    • http://ketavulamuxi.epizy.com/jeletomabudamagazotopunun.pdfIn PDF document text
    • https://s3.amazonaws.com/nopomewegobij/medicinal_chemistry_multiple_choice_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xirixepo/virus_cleaner_antivirus_booster_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/61192826085.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_off0000eeec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEEC 5216 bytes
SHA-256: 8cee17828d64a72c6db8acf624d6f6f9cfde424a6cd037225bead3ffdbfe6454
font_01_sfnt_off000100cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CF 10476 bytes
SHA-256: 31c66413fea144996ba3b87466c961216e496341d45e8ab20d956e4024de58ff

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